{"id":30,"date":"2021-05-14T00:15:06","date_gmt":"2021-05-13T16:15:06","guid":{"rendered":"https:\/\/www.xudongvp.com\/?p=30"},"modified":"2021-05-14T00:41:40","modified_gmt":"2021-05-13T16:41:40","slug":"httpclient-4-3-%e4%b8%ad%e6%96%87%e7%94%a8%e6%88%b7%e6%89%8b%e5%86%8c","status":"publish","type":"post","link":"https:\/\/www.xudongvp.com\/?p=30","title":{"rendered":"HttpClient 4.3 \u4e2d\u6587\u7528\u6237\u624b\u518c"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">\u524d\u8a00<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Http\u534f\u8bae\u5e94\u8be5\u662f\u4e92\u8054\u7f51\u4e2d\u6700\u91cd\u8981\u7684\u534f\u8bae\u3002\u6301\u7eed\u589e\u957f\u7684web\u670d\u52a1\u3001\u53ef\u8054\u7f51\u7684\u5bb6\u7528\u7535\u5668\u7b49\u90fd\u5728\u7ee7\u627f\u5e76\u62d3\u5c55\u7740Http\u534f\u8bae\uff0c\u5411\u7740\u6d4f\u89c8\u5668\u4e4b\u5916\u7684\u65b9\u5411\u53d1\u5c55\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u867d\u7136jdk\u4e2d\u7684java.net\u5305\u4e2d\u63d0\u4f9b\u4e86\u4e00\u4e9b\u57fa\u672c\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7http\u534f\u8bae\u6765\u8bbf\u95ee\u7f51\u7edc\u8d44\u6e90\uff0c\u4f46\u662f\u5927\u591a\u6570\u573a\u666f\u4e0b\uff0c\u5b83\u90fd\u4e0d\u591f\u7075\u6d3b\u548c\u5f3a\u5927\u3002HttpClient\u81f4\u529b\u4e8e\u586b\u8865\u8fd9\u4e2a\u7a7a\u767d\uff0c\u5b83\u53ef\u4ee5\u63d0\u4f9b\u6709\u6548\u7684\u3001\u6700\u65b0\u7684\u3001\u529f\u80fd\u4e30\u5bcc\u7684\u5305\u6765\u5b9e\u73b0http\u5ba2\u6237\u7aef\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u62d3\u5c55\uff0cHttpClient\u5373\u652f\u6301\u57fa\u672c\u7684http\u534f\u8bae\uff0c\u8fd8\u652f\u6301http-aware\u5ba2\u6237\u7aef\u7a0b\u5e8f\uff0c\u5982web\u6d4f\u89c8\u5668\uff0cWebservice\u5ba2\u6237\u7aef\uff0c\u4ee5\u53ca\u5229\u7528or\u62d3\u5c55http\u534f\u8bae\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1\u3001HttpClient\u7684\u8303\u56f4\/\u7279\u6027<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u662f\u4e00\u4e2a\u57fa\u4e8eHttpCore\u7684\u5ba2\u6237\u7aefHttp\u4f20\u8f93\u7c7b\u5e93<\/li><li>\u57fa\u4e8e\u4f20\u7edf\u7684\uff08\u963b\u585e\uff09IO<\/li><li>\u5185\u5bb9\u65e0\u5173<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2\u3001HttpClient\u4e0d\u80fd\u505a\u7684\u4e8b\u60c5<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>HttpClient\u4e0d\u662f\u6d4f\u89c8\u5668\uff0c\u5b83\u662f\u4e00\u4e2a\u5ba2\u6237\u7aefhttp\u534f\u8bae\u4f20\u8f93\u7c7b\u5e93\u3002HttpClient\u88ab\u7528\u6765\u53d1\u9001\u548c\u63a5\u53d7Http\u6d88\u606f\u3002HttpClient\u4e0d\u4f1a\u5904\u7406http\u6d88\u606f\u7684\u5185\u5bb9\uff0c\u4e0d\u4f1a\u8fdb\u884cjavascript\u89e3\u6790\uff0c\u4e0d\u4f1a\u5173\u5fc3content type\uff0c\u5982\u679c\u6ca1\u6709\u660e\u786e\u8bbe\u7f6e\uff0chttpclient\u4e5f\u4e0d\u4f1a\u5bf9\u8bf7\u6c42\u8fdb\u884c\u683c\u5f0f\u5316\u3001\u91cd\u5b9a\u5411url\uff0c\u6216\u8005\u5176\u4ed6\u4efb\u4f55\u548chttp\u6d88\u606f\u4f20\u8f93\u76f8\u5173\u7684\u529f\u80fd\u3002<\/li><\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">\u7b2c\u4e00\u7ae0 \u57fa\u672c\u6982\u5ff5<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">1.1. \u8bf7\u6c42\u6267\u884c<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u6700\u57fa\u672c\u7684\u529f\u80fd\u5c31\u662f\u6267\u884cHttp\u65b9\u6cd5\u3002\u4e00\u4e2aHttp\u65b9\u6cd5\u7684\u6267\u884c\u6d89\u53ca\u5230\u4e00\u4e2a\u6216\u8005\u591a\u4e2aHttp\u8bf7\u6c42\/Http\u54cd\u5e94\u7684\u4ea4\u4e92\uff0c\u901a\u5e38\u8fd9\u4e2a\u8fc7\u7a0b\u90fd\u4f1a\u81ea\u52a8\u88abHttpClient\u5904\u7406\uff0c\u5bf9\u7528\u6237\u900f\u660e\u3002\u7528\u6237\u53ea\u9700\u8981\u63d0\u4f9bHttp\u8bf7\u6c42\u5bf9\u8c61\uff0cHttpClient\u5c31\u4f1a\u5c06http\u8bf7\u6c42\u53d1\u9001\u7ed9\u76ee\u6807\u670d\u52a1\u5668\uff0c\u5e76\u4e14\u63a5\u6536\u670d\u52a1\u5668\u7684\u54cd\u5e94\uff0c\u5982\u679chttp\u8bf7\u6c42\u6267\u884c\u4e0d\u6210\u529f\uff0chttpclient\u5c31\u4f1a\u629b\u51fa\u5f02\u6837\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u662f\u4e2a\u5f88\u7b80\u5355\u7684http\u8bf7\u6c42\u6267\u884c\u7684\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.createDefault();&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;http:\/\/localhost\/&#8221;);&nbsp;&nbsp;<\/li><li>CloseableHttpResponse&nbsp;response&nbsp;=&nbsp;httpclient.execute(httpget);&nbsp;&nbsp;<\/li><li>try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;response.close();&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">1.1.1. HTTP\u8bf7\u6c42<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u6709\u7684Http\u8bf7\u6c42\u90fd\u6709\u4e00\u4e2a\u8bf7\u6c42\u884c(request line)\uff0c\u5305\u62ec\u65b9\u6cd5\u540d\u3001\u8bf7\u6c42\u7684URI\u548cHttp\u7248\u672c\u53f7\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u652f\u6301HTTP\/1.1\u8fd9\u4e2a\u7248\u672c\u5b9a\u4e49\u7684\u6240\u6709Http\u65b9\u6cd5\uff1a<code>GET<\/code>,<code>HEAD<\/code>,<code>POST<\/code>,<code>PUT<\/code>,<code>DELETE<\/code>,TRACE<code>\u548c<\/code>OPTIONS<code>\u3002\u5bf9\u4e8e\u6bcf\u4e00\u79cdhttp\u65b9\u6cd5\uff0cHttpClient\u90fd\u5b9a\u4e49\u4e86\u4e00\u4e2a\u76f8\u5e94\u7684\u7c7b\uff1a<\/code>HttpGet<code>,&nbsp;<\/code>HttpHead<code>,&nbsp;<\/code>HttpPost<code>,&nbsp;<\/code>HttpPut<code>,&nbsp;<\/code>HttpDelete<code>,&nbsp;<\/code>HttpTrace<code>\u548c<\/code>HttpOpquertions\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Request-URI\u5373\u7edf\u4e00\u8d44\u6e90\u5b9a\u4f4d\u7b26\uff0c\u7528\u6765\u6807\u660eHttp\u8bf7\u6c42\u4e2d\u7684\u8d44\u6e90\u3002Http request URIs\u5305\u542b\u534f\u8bae\u540d\u3001\u4e3b\u673a\u540d\u3001\u4e3b\u673a\u7aef\u53e3\uff08\u53ef\u9009\uff09\u3001\u8d44\u6e90\u8def\u5f84\u3001query\uff08\u53ef\u9009\uff09\u548c\u7247\u6bb5\u4fe1\u606f\uff08\u53ef\u9009\uff09\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>HttpGet&nbsp;httpget&nbsp;=&nbsp;new&nbsp;HttpGet(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&#8220;http:\/\/www.google.com\/search?hl=en&amp;q=httpclient&amp;btnG=Google+Search&amp;aq=f&amp;oq=&#8221;);&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u63d0\u4f9b<code>URIBuilder<\/code>\u5de5\u5177\u7c7b\u6765\u7b80\u5316URIs\u7684\u521b\u5efa\u548c\u4fee\u6539\u8fc7\u7a0b\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>URI&nbsp;uri&nbsp;=&nbsp;new&nbsp;URIBuilder()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setScheme(&#8220;http&#8221;)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setHost(&#8220;www.google.com&#8221;)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setPath(&#8220;\/search&#8221;)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setParameter(&#8220;q&#8221;,&nbsp;&#8220;httpclient&#8221;)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setParameter(&#8220;btnG&#8221;,&nbsp;&#8220;Google&nbsp;Search&#8221;)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setParameter(&#8220;aq&#8221;,&nbsp;&#8220;f&#8221;)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setParameter(&#8220;oq&#8221;,&nbsp;&#8220;&#8221;)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget&nbsp;=&nbsp;new&nbsp;HttpGet(uri);&nbsp;&nbsp;<\/li><li>System.out.println(httpget.getURI());&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8ff0\u4ee3\u7801\u4f1a\u5728\u63a7\u5236\u53f0\u8f93\u51fa\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>http:\/\/www.google.com\/search?q=httpclient&amp;btnG=Google+Search&amp;aq=f&amp;oq=&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">1.1.2. HTTP\u54cd\u5e94<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u670d\u52a1\u5668\u6536\u5230\u5ba2\u6237\u7aef\u7684http\u8bf7\u6c42\u540e\uff0c\u5c31\u4f1a\u5bf9\u5176\u8fdb\u884c\u89e3\u6790\uff0c\u7136\u540e\u628a\u54cd\u5e94\u53d1\u7ed9\u5ba2\u6237\u7aef\uff0c\u8fd9\u4e2a\u54cd\u5e94\u5c31\u662fHTTP response.HTTP\u54cd\u5e94\u7b2c\u4e00\u884c\u662f\u534f\u8bae\u7248\u672c\uff0c\u4e4b\u540e\u662f\u6570\u5b57\u72b6\u6001\u7801\u548c\u76f8\u5173\u8054\u7684\u6587\u672c\u6bb5\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>HttpResponse&nbsp;response&nbsp;=&nbsp;new&nbsp;BasicHttpResponse(HttpVersion.HTTP_1_1,&nbsp;&nbsp;&nbsp;<\/li><li>HttpStatus.SC_OK,&nbsp;&#8220;OK&#8221;);&nbsp;&nbsp;<\/li><li>System.out.println(response.getProtocolVersion());&nbsp;&nbsp;<\/li><li>System.out.println(response.getStatusLine().getStatusCode());&nbsp;&nbsp;<\/li><li>System.out.println(response.getStatusLine().getReasonPhrase());&nbsp;&nbsp;<\/li><li>System.out.println(response.getStatusLine().toString());&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><br>\u4e0a\u8ff0\u4ee3\u7801\u4f1a\u5728\u63a7\u5236\u53f0\u8f93\u51fa\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>HTTP\/1.1&nbsp;&nbsp;<\/li><li>200&nbsp;&nbsp;<\/li><li>OK&nbsp;&nbsp;<\/li><li>HTTP\/1.1&nbsp;200&nbsp;OK&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">1.1.3. \u6d88\u606f\u5934<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u4e2aHttp\u6d88\u606f\u53ef\u4ee5\u5305\u542b\u4e00\u7cfb\u5217\u7684\u6d88\u606f\u5934\uff0c\u7528\u6765\u5bf9http\u6d88\u606f\u8fdb\u884c\u63cf\u8ff0\uff0c\u6bd4\u5982\u6d88\u606f\u957f\u5ea6\uff0c\u6d88\u606f\u7c7b\u578b\u7b49\u7b49\u3002HttpClient\u63d0\u4f9b\u4e86\u65b9\u6cd5\u6765\u83b7\u53d6\u3001\u6dfb\u52a0\u3001\u79fb\u9664\u3001\u679a\u4e3e\u6d88\u606f\u5934\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>HttpResponse&nbsp;response&nbsp;=&nbsp;new&nbsp;BasicHttpResponse(HttpVersion.HTTP_1_1,&nbsp;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;HttpStatus.SC_OK,&nbsp;&#8220;OK&#8221;);&nbsp;&nbsp;<\/li><li>response.addHeader(&#8220;Set-Cookie&#8221;,&nbsp;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&#8220;c1=a;&nbsp;path=\/;&nbsp;domain=localhost&#8221;);&nbsp;&nbsp;<\/li><li>response.addHeader(&#8220;Set-Cookie&#8221;,&nbsp;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&#8220;c2=b;&nbsp;path=\\&#8221;\/\\&#8221;,&nbsp;c3=c;&nbsp;domain=\\&#8221;localhost\\&#8221;&#8221;);&nbsp;&nbsp;<\/li><li>Header&nbsp;h1&nbsp;=&nbsp;response.getFirstHeader(&#8220;Set-Cookie&#8221;);&nbsp;&nbsp;<\/li><li>System.out.println(h1);&nbsp;&nbsp;<\/li><li>Header&nbsp;h2&nbsp;=&nbsp;response.getLastHeader(&#8220;Set-Cookie&#8221;);&nbsp;&nbsp;<\/li><li>System.out.println(h2);&nbsp;&nbsp;<\/li><li>Header[]&nbsp;hs&nbsp;=&nbsp;response.getHeaders(&#8220;Set-Cookie&#8221;);&nbsp;&nbsp;<\/li><li>System.out.println(hs.length);&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><br>\u4e0a\u8ff0\u4ee3\u7801\u4f1a\u5728\u63a7\u5236\u53f0\u8f93\u51fa\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Set-Cookie:&nbsp;c1=a;&nbsp;path=\/;&nbsp;domain=localhost&nbsp;&nbsp;<\/li><li>Set-Cookie:&nbsp;c2=b;&nbsp;path=&#8221;\/&#8221;,&nbsp;c3=c;&nbsp;domain=&#8221;localhost&#8221;&nbsp;&nbsp;<\/li><li>2&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u6709\u6548\u7684\u83b7\u53d6\u6307\u5b9a\u7c7b\u578b\u7684\u6d88\u606f\u5934\u7684\u65b9\u6cd5\u8fd8\u662f\u4f7f\u7528<code>HeaderIterator<\/code>\u63a5\u53e3\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>HttpResponse&nbsp;response&nbsp;=&nbsp;new&nbsp;BasicHttpResponse(HttpVersion.HTTP_1_1,&nbsp;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;HttpStatus.SC_OK,&nbsp;&#8220;OK&#8221;);&nbsp;&nbsp;<\/li><li>response.addHeader(&#8220;Set-Cookie&#8221;,&nbsp;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&#8220;c1=a;&nbsp;path=\/;&nbsp;domain=localhost&#8221;);&nbsp;&nbsp;<\/li><li>response.addHeader(&#8220;Set-Cookie&#8221;,&nbsp;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&#8220;c2=b;&nbsp;path=\\&#8221;\/\\&#8221;,&nbsp;c3=c;&nbsp;domain=\\&#8221;localhost\\&#8221;&#8221;);&nbsp;&nbsp;<\/li><li>HeaderIterator&nbsp;it&nbsp;=&nbsp;response.headerIterator(&#8220;Set-Cookie&#8221;);&nbsp;&nbsp;<\/li><li>while&nbsp;(it.hasNext())&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(it.next());&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8ff0\u4ee3\u7801\u4f1a\u5728\u63a7\u5236\u53f0\u8f93\u51fa\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Set-Cookie:&nbsp;c1=a;&nbsp;path=\/;&nbsp;domain=localhost&nbsp;&nbsp;<\/li><li>Set-Cookie:&nbsp;c2=b;&nbsp;path=&#8221;\/&#8221;,&nbsp;c3=c;&nbsp;domain=&#8221;localhost&#8221;&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">HeaderIterator\u4e5f\u63d0\u4f9b\u975e\u5e38\u4fbf\u6377\u7684\u65b9\u5f0f\uff0c\u5c06Http\u6d88\u606f\u89e3\u6790\u6210\u5355\u72ec\u7684\u6d88\u606f\u5934\u5143\u7d20\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>HttpResponse&nbsp;response&nbsp;=&nbsp;new&nbsp;BasicHttpResponse(HttpVersion.HTTP_1_1,&nbsp;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;HttpStatus.SC_OK,&nbsp;&#8220;OK&#8221;);&nbsp;&nbsp;<\/li><li>response.addHeader(&#8220;Set-Cookie&#8221;,&nbsp;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&#8220;c1=a;&nbsp;path=\/;&nbsp;domain=localhost&#8221;);&nbsp;&nbsp;<\/li><li>response.addHeader(&#8220;Set-Cookie&#8221;,&nbsp;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&#8220;c2=b;&nbsp;path=\\&#8221;\/\\&#8221;,&nbsp;c3=c;&nbsp;domain=\\&#8221;localhost\\&#8221;&#8221;);&nbsp;&nbsp;<\/li><li>HeaderElementIterator&nbsp;it&nbsp;=&nbsp;new&nbsp;BasicHeaderElementIterator(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;response.headerIterator(&#8220;Set-Cookie&#8221;));&nbsp;&nbsp;<\/li><li>while&nbsp;(it.hasNext())&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;HeaderElement&nbsp;elem&nbsp;=&nbsp;it.nextElement();&nbsp;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(elem.getName()&nbsp;+&nbsp;&#8221;&nbsp;=&nbsp;&#8221;&nbsp;+&nbsp;elem.getValue());&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;NameValuePair[]&nbsp;params&nbsp;=&nbsp;elem.getParameters();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;for&nbsp;(int&nbsp;i&nbsp;=&nbsp;0;&nbsp;i&nbsp;&lt;&nbsp;params.length;&nbsp;i++)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(&#8221;&nbsp;&#8221;&nbsp;+&nbsp;params[i]);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8ff0\u4ee3\u7801\u4f1a\u5728\u63a7\u5236\u53f0\u8f93\u51fa\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>c1&nbsp;=&nbsp;a&nbsp;&nbsp;<\/li><li>path=\/&nbsp;&nbsp;<\/li><li>domain=localhost&nbsp;&nbsp;<\/li><li>c2&nbsp;=&nbsp;b&nbsp;&nbsp;<\/li><li>path=\/&nbsp;&nbsp;<\/li><li>c3&nbsp;=&nbsp;c&nbsp;&nbsp;<\/li><li>domain=localhost&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">1.1.4. HTTP\u5b9e\u4f53<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Http\u6d88\u606f\u53ef\u4ee5\u643a\u5e26http\u5b9e\u4f53\uff0c\u8fd9\u4e2ahttp\u5b9e\u4f53\u65e2\u53ef\u4ee5\u662fhttp\u8bf7\u6c42\uff0c\u4e5f\u53ef\u4ee5\u662fhttp\u54cd\u5e94\u7684\u3002Http\u5b9e\u4f53\uff0c\u53ef\u4ee5\u5728\u67d0\u4e9bhttp\u8bf7\u6c42\u6216\u8005\u54cd\u5e94\u4e2d\u53d1\u73b0\uff0c\u4f46\u4e0d\u662f\u5fc5\u987b\u7684\u3002Http\u89c4\u8303\u4e2d\u5b9a\u4e49\u4e86\u4e24\u79cd\u5305\u542b\u8bf7\u6c42\u7684\u65b9\u6cd5\uff1aPOST\u548cPUT\u3002HTTP\u54cd\u5e94\u4e00\u822c\u4f1a\u5305\u542b\u4e00\u4e2a\u5185\u5bb9\u5b9e\u4f53\u3002\u5f53\u7136\u8fd9\u6761\u89c4\u5219\u4e5f\u6709\u5f02\u5e38\u60c5\u51b5\uff0c\u5982Head\u65b9\u6cd5\u7684\u54cd\u5e94\uff0c204\u6ca1\u6709\u5185\u5bb9\uff0c304\u6ca1\u6709\u4fee\u6539\u6216\u8005205\u5185\u5bb9\u8d44\u6e90\u91cd\u7f6e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u6839\u636e\u6765\u6e90\u7684\u4e0d\u540c\uff0c\u5212\u5206\u4e86\u4e09\u79cd\u4e0d\u540c\u7684Http\u5b9e\u4f53\u5185\u5bb9\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>streamed\u6d41\u5f0f:<\/strong>&nbsp;\u5185\u5bb9\u662f\u901a\u8fc7\u6d41\u6765\u63a5\u53d7\u6216\u8005\u5728\u8fd0\u884c\u4e2d\u4ea7\u751f\u3002\u7279\u522b\u662f\uff0cstreamed\u8fd9\u4e00\u7c7b\u5305\u542b\u4ecehttp\u54cd\u5e94\u4e2d\u83b7\u53d6\u7684\u5b9e\u4f53\u5185\u5bb9\u3002\u4e00\u822c\u8bf4\u6765\uff0cstreamed\u5b9e\u4f53\u662f\u4e0d\u53ef\u91cd\u590d\u7684\u3002<\/li><li><strong>self-contained\u81ea\u6211\u5305\u542b\u5f0f:<\/strong>\u5185\u5bb9\u5728\u5185\u5b58\u4e2d\u6216\u901a\u8fc7\u72ec\u7acb\u7684\u8fde\u63a5\u6216\u5176\u5b83\u5b9e\u4f53\u4e2d\u83b7\u5f97\u3002self-contained\u7c7b\u578b\u7684\u5b9e\u4f53\u5185\u5bb9\u901a\u5e38\u662f\u53ef\u91cd\u590d\u7684\u3002\u8fd9\u79cd\u7c7b\u578b\u7684\u5b9e\u4f53\u901a\u5e38\u7528\u4e8e\u5173\u95edhttp\u8bf7\u6c42\u3002<\/li><li><strong>wrapping\u5305\u88c5\u5f0f:<\/strong>&nbsp;\u8fd9\u79cd\u7c7b\u578b\u7684\u5185\u5bb9\u662f\u4ece\u53e6\u5916\u7684http\u5b9e\u4f53\u4e2d\u83b7\u53d6\u7684\u3002<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u4eceHttp\u54cd\u5e94\u4e2d\u8bfb\u53d6\u5185\u5bb9\u65f6\uff0c\u4e0a\u9762\u7684\u4e09\u79cd\u533a\u5206\u5bf9\u4e8e\u8fde\u63a5\u7ba1\u7406\u5668\u6765\u8bf4\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u5bf9\u4e8e\u7531\u5e94\u7528\u7a0b\u5e8f\u521b\u5efa\u800c\u4e14\u53ea\u4f7f\u7528HttpClient\u53d1\u9001\u7684\u8bf7\u6c42\u5b9e\u4f53\uff0cstreamed\u548cself-contained\u4e24\u79cd\u7c7b\u578b\u7684\u4e0d\u540c\u5c31\u4e0d\u90a3\u4e48\u91cd\u8981\u4e86\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5efa\u8bae\u8003\u8651\u5982streamed\u6d41\u5f0f\u8fd9\u79cd\u4e0d\u80fd\u91cd\u590d\u7684\u5b9e\u4f53\uff0c\u548c\u53ef\u4ee5\u91cd\u590d\u7684self-contained\u81ea\u6211\u5305\u542b\u5f0f\u5b9e\u4f53\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">1.1.4.1. \u53ef\u91cd\u590d\u7684\u5b9e\u4f53<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u4e2a\u5b9e\u4f53\u662f\u53ef\u91cd\u590d\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\u5b83\u7684\u5305\u542b\u7684\u5185\u5bb9\u53ef\u4ee5\u88ab\u591a\u6b21\u8bfb\u53d6\u3002\u8fd9\u79cd\u591a\u6b21\u8bfb\u53d6\u53ea\u6709self contained\uff08\u81ea\u5305\u542b\uff09\u7684\u5b9e\u4f53\u80fd\u505a\u5230\uff08\u6bd4\u5982<code>ByteArrayEntity<\/code>\u6216\u8005<code>StringEntity<\/code>)\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">1.1.4.2. \u4f7f\u7528Http\u5b9e\u4f53<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u7531\u4e8e\u4e00\u4e2aHttp\u5b9e\u4f53\u65e2\u53ef\u4ee5\u8868\u793a\u4e8c\u8fdb\u5236\u5185\u5bb9\uff0c\u53c8\u53ef\u4ee5\u8868\u793a\u6587\u672c\u5185\u5bb9\uff0c\u6240\u4ee5Http\u5b9e\u4f53\u8981\u652f\u6301\u5b57\u7b26\u7f16\u7801\uff08\u4e3a\u4e86\u652f\u6301\u540e\u8005\uff0c\u5373\u6587\u672c\u5185\u5bb9\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u9700\u8981\u6267\u884c\u4e00\u4e2a\u5b8c\u6574\u5185\u5bb9\u7684Http\u8bf7\u6c42\u6216\u8005Http\u8bf7\u6c42\u5df2\u7ecf\u6210\u529f\uff0c\u670d\u52a1\u5668\u8981\u53d1\u9001\u54cd\u5e94\u5230\u5ba2\u6237\u7aef\u65f6\uff0cHttp\u5b9e\u4f53\u5c31\u4f1a\u88ab\u521b\u5efa\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u8981\u4eceHttp\u5b9e\u4f53\u4e2d\u8bfb\u53d6\u5185\u5bb9\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528<code>HttpEntity<\/code>\u7c7b\u7684<code>getContent<\/code>\u65b9\u6cd5\u6765\u83b7\u53d6\u5b9e\u4f53\u7684\u8f93\u5165\u6d41\uff08<code>java.io.InputStream<\/code>)\uff0c\u6216\u8005\u5229\u7528<code>HttpEntity<\/code>\u7c7b\u7684<code>writeTo(OutputStream)<\/code>\u65b9\u6cd5\u6765\u83b7\u53d6\u8f93\u51fa\u6d41\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u4f1a\u628a\u6240\u6709\u7684\u5185\u5bb9\u5199\u5165\u5230\u7ed9\u5b9a\u7684\u6d41\u4e2d\u3002<br>\u5f53\u5b9e\u4f53\u7c7b\u5df2\u7ecf\u88ab\u63a5\u53d7\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528<code>HttpEntity<\/code>\u7c7b\u7684<code>getContentType()<\/code>\u548c<code>getContentLength()<\/code>\u65b9\u6cd5\u6765\u8bfb\u53d6<code>Content-Type<\/code>\u548c<code>Content-Length<\/code>\u4e24\u4e2a\u5934\u6d88\u606f\uff08\u5982\u679c\u6709\u7684\u8bdd\uff09\u3002\u7531\u4e8e<code>Content-Type<\/code>\u5305\u542bmime-types\u7684\u5b57\u7b26\u7f16\u7801\uff0c\u6bd4\u5982text\/plain\u6216\u8005text\/html,<code>HttpEntity<\/code>\u7c7b\u7684<code>getContentEncoding()<\/code>\u65b9\u6cd5\u5c31\u662f\u8bfb\u53d6\u8fd9\u4e2a\u7f16\u7801\u7684\u3002\u5982\u679c\u5934\u4fe1\u606f\u4e0d\u5b58\u5728\uff0c<code>getContentLength\uff08\uff09<\/code>\u4f1a\u8fd4\u56de-1,<code>getContentType()<\/code>\u4f1a\u8fd4\u56deNULL\u3002\u5982\u679c<code>Content-Type<\/code>\u4fe1\u606f\u5b58\u5728\uff0c\u5c31\u4f1a\u8fd4\u56de\u4e00\u4e2a<code>Header<\/code>\u7c7b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u4e3a\u53d1\u9001\u6d88\u606f\u521b\u5efaHttp\u5b9e\u4f53\u65f6\uff0c\u9700\u8981\u540c\u65f6\u9644\u52a0meta\u4fe1\u606f\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>StringEntity&nbsp;myEntity&nbsp;=&nbsp;new&nbsp;StringEntity(&#8220;important&nbsp;message&#8221;,&nbsp;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;ContentType.create(&#8220;text\/plain&#8221;,&nbsp;&#8220;UTF-8&#8221;));&nbsp;&nbsp;<\/li><li>System.out.println(myEntity.getContentType());&nbsp;&nbsp;<\/li><li>System.out.println(myEntity.getContentLength());&nbsp;&nbsp;<\/li><li>System.out.println(EntityUtils.toString(myEntity));&nbsp;&nbsp;<\/li><li>System.out.println(EntityUtils.toByteArray(myEntity).length);&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><br>\u4e0a\u8ff0\u4ee3\u7801\u4f1a\u5728\u63a7\u5236\u53f0\u8f93\u51fa\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Content-Type:&nbsp;text\/plain;&nbsp;charset=utf-8&nbsp;&nbsp;<\/li><li>17&nbsp;&nbsp;<\/li><li>important&nbsp;message&nbsp;&nbsp;<\/li><li>17&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">1.1.5. \u786e\u4fdd\u5e95\u5c42\u7684\u8d44\u6e90\u8fde\u63a5\u88ab\u91ca\u653e<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u786e\u4fdd\u7cfb\u7edf\u8d44\u6e90\u88ab\u6b63\u786e\u5730\u91ca\u653e\uff0c\u6211\u4eec\u8981\u4e48\u7ba1\u7406Http\u5b9e\u4f53\u7684\u5185\u5bb9\u6d41\u3001\u8981\u4e48\u5173\u95edHttp\u54cd\u5e94\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.createDefault();&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;http:\/\/localhost\/&#8221;);&nbsp;&nbsp;<\/li><li>CloseableHttpResponse&nbsp;response&nbsp;=&nbsp;httpclient.execute(httpget);&nbsp;&nbsp;<\/li><li>try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;HttpEntity&nbsp;entity&nbsp;=&nbsp;response.getEntity();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(entity&nbsp;!=&nbsp;null)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;InputStream&nbsp;instream&nbsp;=&nbsp;entity.getContent();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;do&nbsp;something&nbsp;useful&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;instream.close();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;response.close();&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><br>\u5173\u95edHttp\u5b9e\u4f53\u5185\u5bb9\u6d41\u548c\u5173\u95edHttp\u54cd\u5e94\u7684\u533a\u522b\u5728\u4e8e\uff0c\u524d\u8005\u901a\u8fc7\u6d88\u8017\u6389Http\u5b9e\u4f53\u5185\u5bb9\u6765\u4fdd\u6301\u76f8\u5173\u7684http\u8fde\u63a5\uff0c\u7136\u540e\u540e\u8005\u4f1a\u7acb\u5373\u5173\u95ed\u3001\u4e22\u5f03http\u8fde\u63a5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bf7\u6ce8\u610f<code>HttpEntity<\/code>\u7684<code>writeTo(OutputStream)<\/code>\u65b9\u6cd5\uff0c\u5f53Http\u5b9e\u4f53\u88ab\u5199\u5165\u5230OutputStream\u540e\uff0c\u4e5f\u8981\u786e\u4fdd\u91ca\u653e\u7cfb\u7edf\u8d44\u6e90\u3002\u5982\u679c\u8fd9\u4e2a\u65b9\u6cd5\u5185\u8c03\u7528\u4e86<code>HttpEntity<\/code>\u7684<code>getContent()<\/code>\u65b9\u6cd5\uff0c\u90a3\u4e48\u5b83\u4f1a\u6709\u4e00\u4e2a<code>java.io.InpputStream<\/code>\u7684\u5b9e\u4f8b\uff0c\u6211\u4eec\u9700\u8981\u5728finally\u4e2d\u5173\u95ed\u8fd9\u4e2a\u6d41\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u662f\u4e5f\u6709\u8fd9\u6837\u7684\u60c5\u51b5\uff0c\u6211\u4eec\u53ea\u9700\u8981\u83b7\u53d6Http\u54cd\u5e94\u5185\u5bb9\u7684\u4e00\u5c0f\u90e8\u5206\uff0c\u800c\u83b7\u53d6\u6574\u4e2a\u5185\u5bb9\u5e76\u3001\u5b9e\u73b0\u8fde\u63a5\u7684\u53ef\u91cd\u590d\u6027\u4ee3\u4ef7\u592a\u5927\uff0c\u8fd9\u65f6\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5173\u95ed\u54cd\u5e94\u7684\u65b9\u5f0f\u6765\u5173\u95ed\u5185\u5bb9\u8f93\u5165\u3001\u8f93\u51fa\u6d41\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.createDefault();&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;http:\/\/localhost\/&#8221;);&nbsp;&nbsp;<\/li><li>CloseableHttpResponse&nbsp;response&nbsp;=&nbsp;httpclient.execute(httpget);&nbsp;&nbsp;<\/li><li>try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;HttpEntity&nbsp;entity&nbsp;=&nbsp;response.getEntity();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(entity&nbsp;!=&nbsp;null)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;InputStream&nbsp;instream&nbsp;=&nbsp;entity.getContent();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;int&nbsp;byteOne&nbsp;=&nbsp;instream.read();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;int&nbsp;byteTwo&nbsp;=&nbsp;instream.read();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;Do&nbsp;not&nbsp;need&nbsp;the&nbsp;rest&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;response.close();&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><br>\u4e0a\u9762\u7684\u4ee3\u7801\u6267\u884c\u540e\uff0c\u8fde\u63a5\u53d8\u5f97\u4e0d\u53ef\u7528\uff0c\u6240\u6709\u7684\u8d44\u6e90\u90fd\u5c06\u88ab\u91ca\u653e\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1.1.6. \u6d88\u8017HTTP\u5b9e\u4f53\u5185\u5bb9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u63a8\u8350\u4f7f\u7528<code>HttpEntity<\/code>\u7684<code>getConent()<\/code>\u65b9\u6cd5\u6216\u8005<code>HttpEntity<\/code>\u7684<code>writeTo(OutputStream)<\/code>\u65b9\u6cd5\u6765\u6d88\u8017\u6389Http\u5b9e\u4f53\u5185\u5bb9\u3002HttpClient\u4e5f\u63d0\u4f9b\u4e86<code>EntityUtils<\/code>\u8fd9\u4e2a\u7c7b\uff0c\u8fd9\u4e2a\u7c7b\u63d0\u4f9b\u4e00\u4e9b\u9759\u6001\u65b9\u6cd5\u53ef\u4ee5\u66f4\u5bb9\u6613\u5730\u8bfb\u53d6Http\u5b9e\u4f53\u7684\u5185\u5bb9\u548c\u4fe1\u606f\u3002\u548c\u4ee5<code>java.io.InputStream<\/code>\u6d41\u8bfb\u53d6\u5185\u5bb9\u7684\u65b9\u5f0f\u76f8\u6bd4\uff0cEntityUtils\u63d0\u4f9b\u7684\u65b9\u6cd5\u53ef\u4ee5\u4ee5\u5b57\u7b26\u4e32\u6216\u8005\u5b57\u8282\u6570\u7ec4\u7684\u5f62\u5f0f\u8bfb\u53d6Http\u5b9e\u4f53\u3002\u4f46\u662f\uff0c<strong>\u5f3a\u70c8\u4e0d\u63a8\u8350\u4f7f\u7528<code>EntityUtils<\/code>\u8fd9\u4e2a\u7c7b\uff0c<\/strong>\u9664\u975e\u76ee\u6807\u670d\u52a1\u5668\u53d1\u51fa\u7684\u54cd\u5e94\u662f\u53ef\u4fe1\u4efb\u7684\uff0c\u5e76\u4e14http\u54cd\u5e94\u5b9e\u4f53\u7684\u957f\u5ea6\u4e0d\u4f1a\u8fc7\u5927\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.createDefault();&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;http:\/\/localhost\/&#8221;);&nbsp;&nbsp;<\/li><li>CloseableHttpResponse&nbsp;response&nbsp;=&nbsp;httpclient.execute(httpget);&nbsp;&nbsp;<\/li><li>try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;HttpEntity&nbsp;entity&nbsp;=&nbsp;response.getEntity();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(entity&nbsp;!=&nbsp;null)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;long&nbsp;len&nbsp;=&nbsp;entity.getContentLength();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(len&nbsp;!=&nbsp;-1&nbsp;&amp;&amp;&nbsp;len&nbsp;&lt;&nbsp;2048)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(EntityUtils.toString(entity));&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;else&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;Stream&nbsp;content&nbsp;out&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;response.close();&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u6709\u4e9b\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u5e0c\u671b\u53ef\u4ee5\u91cd\u590d\u8bfb\u53d6Http\u5b9e\u4f53\u7684\u5185\u5bb9\u3002\u8fd9\u5c31\u9700\u8981\u628aHttp\u5b9e\u4f53\u5185\u5bb9\u7f13\u5b58\u5728\u5185\u5b58\u6216\u8005\u78c1\u76d8\u4e0a\u3002\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u5c31\u662f\u628aHttp Entity\u8f6c\u5316\u6210<code>BufferedHttpEntity<\/code>\uff0c\u8fd9\u6837\u5c31\u628a\u539fHttp\u5b9e\u4f53\u7684\u5185\u5bb9\u7f13\u51b2\u5230\u4e86\u5185\u5b58\u4e2d\u3002\u540e\u9762\u6211\u4eec\u5c31\u53ef\u4ee5\u91cd\u590d\u8bfb\u53d6BufferedHttpEntity\u4e2d\u7684\u5185\u5bb9\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CloseableHttpResponse&nbsp;response&nbsp;=&nbsp;&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>HttpEntity&nbsp;entity&nbsp;=&nbsp;response.getEntity();&nbsp;&nbsp;<\/li><li>if&nbsp;(entity&nbsp;!=&nbsp;null)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;entity&nbsp;=&nbsp;new&nbsp;BufferedHttpEntity(entity);&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">1.1.7. \u521b\u5efaHTTP\u5b9e\u4f53\u5185\u5bb9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u63d0\u4f9b\u4e86\u4e00\u4e9b\u7c7b\uff0c\u8fd9\u4e9b\u7c7b\u53ef\u4ee5\u901a\u8fc7http\u8fde\u63a5\u9ad8\u6548\u5730\u8f93\u51faHttp\u5b9e\u4f53\u5185\u5bb9\u3002HttpClient\u63d0\u4f9b\u7684\u8fd9\u51e0\u4e2a\u7c7b\u6db5\u76d6\u7684\u5e38\u89c1\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5982String\uff0cbyte\u6570\u7ec4\uff0c\u8f93\u5165\u6d41\uff0c\u548c\u6587\u4ef6\u7c7b\u578b\uff1a<code>StringEntity<\/code>,<code>ByteArrayEntity<\/code>,<code>InputStreamEntity<\/code>,<code>FileEntity<\/code>\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>File&nbsp;file&nbsp;=&nbsp;new&nbsp;File(&#8220;somefile.txt&#8221;);&nbsp;&nbsp;<\/li><li>FileEntity&nbsp;entity&nbsp;=&nbsp;new&nbsp;FileEntity(file,&nbsp;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;ContentType.create(&#8220;text\/plain&#8221;,&nbsp;&#8220;UTF-8&#8221;));&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<\/li><li>HttpPost&nbsp;httppost&nbsp;=&nbsp;new&nbsp;HttpPost(&#8220;http:\/\/localhost\/action.do&#8221;);&nbsp;&nbsp;<\/li><li>httppost.setEntity(entity);&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bf7\u6ce8\u610f\u7531\u4e8e<code>InputStreamEntity<\/code>\u53ea\u80fd\u4ece\u4e0b\u5c42\u7684\u6570\u636e\u6d41\u4e2d\u8bfb\u53d6\u4e00\u6b21\uff0c\u6240\u4ee5\u5b83\u662f\u4e0d\u80fd\u91cd\u590d\u7684\u3002\u63a8\u8350\uff0c\u901a\u8fc7\u7ee7\u627f<code>HttpEntity<\/code>\u8fd9\u4e2a\u81ea\u5305\u542b\u7684\u7c7b\u6765\u81ea\u5b9a\u4e49HttpEntity\u7c7b\uff0c\u800c\u4e0d\u662f\u76f4\u63a5\u4f7f\u7528<code>InputStreamEntity<\/code>\u8fd9\u4e2a\u7c7b\u3002<code>FileEntity<\/code>\u5c31\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u8d77\u70b9\uff08FileEntity\u5c31\u662f\u7ee7\u627f\u7684HttpEntity\uff09\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">1.7.1.1. HTML\u8868\u5355<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f88\u591a\u5e94\u7528\u7a0b\u5e8f\u9700\u8981\u6a21\u62df\u63d0\u4ea4Html\u8868\u5355\u7684\u8fc7\u7a0b\uff0c\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u767b\u9646\u4e00\u4e2a\u7f51\u7ad9\u6216\u8005\u5c06\u8f93\u5165\u5185\u5bb9\u63d0\u4ea4\u7ed9\u670d\u52a1\u5668\u3002HttpClient\u63d0\u4f9b\u4e86<code>UrlEncodedFormEntity<\/code>\u8fd9\u4e2a\u7c7b\u6765\u5e2e\u52a9\u5b9e\u73b0\u8fd9\u4e00\u8fc7\u7a0b\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>List&lt;NameValuePair&gt;&nbsp;formparams&nbsp;=&nbsp;new&nbsp;ArrayList&lt;NameValuePair&gt;();&nbsp;&nbsp;<\/li><li>formparams.add(new&nbsp;BasicNameValuePair(&#8220;param1&#8221;,&nbsp;&#8220;value1&#8221;));&nbsp;&nbsp;<\/li><li>formparams.add(new&nbsp;BasicNameValuePair(&#8220;param2&#8221;,&nbsp;&#8220;value2&#8221;));&nbsp;&nbsp;<\/li><li>UrlEncodedFormEntity&nbsp;entity&nbsp;=&nbsp;new&nbsp;UrlEncodedFormEntity(formparams,&nbsp;Consts.UTF_8);&nbsp;&nbsp;<\/li><li>HttpPost&nbsp;httppost&nbsp;=&nbsp;new&nbsp;HttpPost(&#8220;http:\/\/localhost\/handler.do&#8221;);&nbsp;&nbsp;<\/li><li>httppost.setEntity(entity);&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><code>UrlEncodedFormEntity<\/code>\u5b9e\u4f8b\u4f1a\u4f7f\u7528\u6240\u8c13\u7684Url\u7f16\u7801\u7684\u65b9\u5f0f\u5bf9\u6211\u4eec\u7684\u53c2\u6570\u8fdb\u884c\u7f16\u7801\uff0c\u4ea7\u751f\u7684\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>param1=value1&amp;m2=value2&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">1.1.7.2. \u5185\u5bb9\u5206\u5757<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u822c\u6765\u8bf4\uff0c\u63a8\u8350\u8ba9HttpClient\u81ea\u5df1\u6839\u636eHttp\u6d88\u606f\u4f20\u9012\u7684\u7279\u5f81\u6765\u9009\u62e9\u6700\u5408\u9002\u7684\u4f20\u8f93\u7f16\u7801\u3002\u5f53\u7136\uff0c\u5982\u679c\u975e\u8981\u624b\u52a8\u63a7\u5236\u4e5f\u662f\u53ef\u4ee5\u7684\uff0c\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e<code>HttpEntity<\/code>\u7684<code>setChunked()<\/code>\u4e3atrue\u3002\u8bf7\u6ce8\u610f\uff1aHttpClient\u4ec5\u4f1a\u5c06\u8fd9\u4e2a\u53c2\u6570\u770b\u6210\u662f\u4e00\u4e2a\u5efa\u8bae\u3002\u5982\u679cHttp\u7684\u7248\u672c\uff08\u5982http 1.0)\u4e0d\u652f\u6301\u5185\u5bb9\u5206\u5757\uff0c\u90a3\u4e48\u8fd9\u4e2a\u53c2\u6570\u5c31\u4f1a\u88ab\u5ffd\u7565\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>StringEntity&nbsp;entity&nbsp;=&nbsp;new&nbsp;StringEntity(&#8220;important&nbsp;message&#8221;,&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ContentType.create(&#8220;plain\/text&#8221;,&nbsp;Consts.UTF_8));&nbsp;&nbsp;<\/li><li>entity.setChunked(true);&nbsp;&nbsp;<\/li><li>HttpPost&nbsp;httppost&nbsp;=&nbsp;new&nbsp;HttpPost(&#8220;http:\/\/localhost\/acrtion.do&#8221;);&nbsp;&nbsp;<\/li><li>httppost.setEntity(entity);&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">1.1.8.RESPONSE HANDLERS<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u7b80\u5355\u4e5f\u662f\u6700\u65b9\u4fbf\u7684\u5904\u7406http\u54cd\u5e94\u7684\u65b9\u6cd5\u5c31\u662f\u4f7f\u7528<code>ResponseHandler<\/code>\u63a5\u53e3\uff0c\u8fd9\u4e2a\u63a5\u53e3\u4e2d\u6709<code>handleResponse(HttpResponse response)<\/code>\u65b9\u6cd5\u3002\u4f7f\u7528\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u7528\u6237\u5b8c\u5168\u4e0d\u7528\u5173\u5fc3http\u8fde\u63a5\u7ba1\u7406\u5668\u3002\u5f53\u4f7f\u7528<code>ResponseHandler<\/code>\u65f6\uff0cHttpClient\u4f1a\u81ea\u52a8\u5730\u5c06Http\u8fde\u63a5\u91ca\u653e\u7ed9Http\u7ba1\u7406\u5668\uff0c\u5373\u4f7fhttp\u8bf7\u6c42\u5931\u8d25\u4e86\u6216\u8005\u629b\u51fa\u4e86\u5f02\u5e38\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.createDefault();&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;http:\/\/localhost\/json&#8221;);&nbsp;&nbsp;<\/li><li>ResponseHandler&lt;MyJsonObject&gt;&nbsp;rh&nbsp;=&nbsp;new&nbsp;ResponseHandler&lt;MyJsonObject&gt;()&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;<a href=\"https:\/\/my.oschina.net\/u\/1162528\">@Override<\/a>&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;JsonObject&nbsp;handleResponse(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;final&nbsp;HttpResponse&nbsp;response)&nbsp;throws&nbsp;IOException&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;StatusLine&nbsp;statusLine&nbsp;=&nbsp;response.getStatusLine();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HttpEntity&nbsp;entity&nbsp;=&nbsp;response.getEntity();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(statusLine.getStatusCode()&nbsp;&gt;=&nbsp;300)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;throw&nbsp;new&nbsp;HttpResponseException(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;statusLine.getStatusCode(),&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;statusLine.getReasonPhrase());&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(entity&nbsp;==&nbsp;null)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;throw&nbsp;new&nbsp;ClientProtocolException(&#8220;Response&nbsp;contains&nbsp;no&nbsp;content&#8221;);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Gson&nbsp;gson&nbsp;=&nbsp;new&nbsp;GsonBuilder().create();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ContentType&nbsp;contentType&nbsp;=&nbsp;ContentType.getOrDefault(entity);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Charset&nbsp;charset&nbsp;=&nbsp;contentType.getCharset();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Reader&nbsp;reader&nbsp;=&nbsp;new&nbsp;InputStreamReader(entity.getContent(),&nbsp;charset);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;gson.fromJson(reader,&nbsp;MyJsonObject.class);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>};&nbsp;&nbsp;<\/li><li>MyJsonObject&nbsp;myjson&nbsp;=&nbsp;client.execute(httpget,&nbsp;rh);&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">1.2. HttpClient\u63a5\u53e3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8eHttp\u8bf7\u6c42\u6267\u884c\u8fc7\u7a0b\u6765\u8bf4\uff0c<code>HttpClient<\/code>\u7684\u63a5\u53e3\u6709\u7740\u5fc5\u4e0d\u53ef\u5c11\u7684\u4f5c\u7528\u3002<code>HttpClient<\/code>\u63a5\u53e3\u6ca1\u6709\u5bf9Http\u8bf7\u6c42\u7684\u8fc7\u7a0b\u505a\u7279\u522b\u7684\u9650\u5236\u548c\u8be6\u7ec6\u7684\u89c4\u5b9a\uff0c\u8fde\u63a5\u7ba1\u7406\u3001\u72b6\u6001\u7ba1\u7406\u3001\u6388\u6743\u4fe1\u606f\u548c\u91cd\u5b9a\u5411\u5904\u7406\u8fd9\u4e9b\u529f\u80fd\u90fd\u5355\u72ec\u5b9e\u73b0\u3002\u8fd9\u6837\u7528\u6237\u5c31\u53ef\u4ee5\u66f4\u7b80\u5355\u5730\u62d3\u5c55\u63a5\u53e3\u7684\u529f\u80fd\uff08\u6bd4\u5982\u7f13\u5b58\u54cd\u5e94\u5185\u5bb9\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u822c\u8bf4\u6765\uff0cHttpClient\u5b9e\u9645\u4e0a\u5c31\u662f\u4e00\u7cfb\u5217\u7279\u6b8a\u7684handler\u6216\u8005\u8bf4\u7b56\u7565\u63a5\u53e3\u7684\u5b9e\u73b0\uff0c\u8fd9\u4e9bhandler\uff08\u6d4b\u8bd5\u63a5\u53e3\uff09\u8d1f\u8d23\u7740\u5904\u7406Http\u534f\u8bae\u7684\u67d0\u4e00\u65b9\u9762\uff0c\u6bd4\u5982\u91cd\u5b9a\u5411\u3001\u8ba4\u8bc1\u5904\u7406\u3001\u6709\u5173\u8fde\u63a5\u6301\u4e45\u6027\u548ckeep alive\u6301\u7eed\u65f6\u95f4\u7684\u51b3\u7b56\u3002\u8fd9\u6837\u5c31\u5141\u8bb8\u7528\u6237\u4f7f\u7528\u81ea\u5b9a\u4e49\u7684\u53c2\u6570\u6765\u4ee3\u66ff\u9ed8\u8ba4\u914d\u7f6e\uff0c\u5b9e\u73b0\u4e2a\u6027\u5316\u7684\u529f\u80fd\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>ConnectionKeepAliveStrategy&nbsp;keepAliveStrat&nbsp;=&nbsp;new&nbsp;DefaultConnectionKeepAliveStrategy()&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;<a href=\"https:\/\/my.oschina.net\/u\/1162528\">@Override<\/a>&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;long&nbsp;getKeepAliveDuration(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HttpResponse&nbsp;response,&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HttpContext&nbsp;context)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;long&nbsp;keepAlive&nbsp;=&nbsp;super.getKeepAliveDuration(response,&nbsp;context);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(keepAlive&nbsp;==&nbsp;-1)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;Keep&nbsp;connections&nbsp;alive&nbsp;5&nbsp;seconds&nbsp;if&nbsp;a&nbsp;keep-alive&nbsp;value&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;has&nbsp;not&nbsp;be&nbsp;explicitly&nbsp;set&nbsp;by&nbsp;the&nbsp;server&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;keepAlive&nbsp;=&nbsp;5000;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;keepAlive;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>};&nbsp;&nbsp;<\/li><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setKeepAliveStrategy(keepAliveStrat)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">1.2.1.HTTPCLIENT\u7684\u7ebf\u7a0b\u5b89\u5168\u6027<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><code>HttpClient<\/code>\u5df2\u7ecf\u5b9e\u73b0\u4e86\u7ebf\u7a0b\u5b89\u5168\u3002\u6240\u4ee5\u5e0c\u671b\u7528\u6237\u5728\u5b9e\u4f8b\u5316HttpClient\u65f6\uff0c\u4e5f\u8981\u652f\u6301\u4e3a\u591a\u4e2a\u8bf7\u6c42\u4f7f\u7528\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1.2.2.HTTPCLIENT\u7684\u5185\u5b58\u5206\u914d<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u4e00\u4e2a<code>CloseableHttpClient<\/code>\u7684\u5b9e\u4f8b\u4e0d\u518d\u88ab\u4f7f\u7528\uff0c\u5e76\u4e14\u5b83\u7684\u4f5c\u7528\u8303\u56f4\u5373\u5c06\u5931\u6548\uff0c\u548c\u5b83\u76f8\u5173\u7684\u8fde\u63a5\u5fc5\u987b\u88ab\u5173\u95ed\uff0c\u5173\u95ed\u65b9\u6cd5\u53ef\u4ee5\u8c03\u7528<code>CloseableHttpClient<\/code>\u7684<code>close()<\/code>\u65b9\u6cd5\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.createDefault();&nbsp;&nbsp;<\/li><li>try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;httpclient.close();&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">1.3.Http\u6267\u884c\u4e0a\u4e0b\u6587<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u521d\uff0cHttp\u88ab\u8bbe\u8ba1\u6210\u4e00\u79cd\u65e0\u72b6\u6001\u7684\u3001\u9762\u5411\u8bf7\u6c42-\u54cd\u5e94\u7684\u534f\u8bae\u3002\u7136\u800c\uff0c\u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\uff0c\u6211\u4eec\u5e0c\u671b\u80fd\u591f\u5728\u4e00\u4e9b\u903b\u8f91\u76f8\u5173\u7684\u8bf7\u6c42-\u54cd\u5e94\u4e2d\uff0c\u4fdd\u6301\u72b6\u6001\u4fe1\u606f\u3002\u4e3a\u4e86\u4f7f\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u4fdd\u6301Http\u7684\u6301\u7eed\u72b6\u6001\uff0cHttpClient\u5141\u8bb8http\u8fde\u63a5\u5728\u7279\u5b9a\u7684Http\u4e0a\u4e0b\u6587\u4e2d\u6267\u884c\u3002\u5982\u679c\u5728\u6301\u7eed\u7684http\u8bf7\u6c42\u4e2d\u4f7f\u7528\u4e86\u540c\u6837\u7684\u4e0a\u4e0b\u6587\uff0c\u90a3\u4e48\u8fd9\u4e9b\u8bf7\u6c42\u5c31\u53ef\u4ee5\u88ab\u5206\u914d\u5230\u4e00\u4e2a\u903b\u8f91\u4f1a\u8bdd\u4e2d\u3002HTTP\u4e0a\u4e0b\u6587\u5c31\u548c\u4e00\u4e2a<code>java.util.Map&lt;String, Object&gt;<\/code>\u529f\u80fd\u7c7b\u4f3c\u3002\u5b83\u5b9e\u9645\u4e0a\u5c31\u662f\u4e00\u4e2a\u4efb\u610f\u547d\u540d\u7684\u503c\u7684\u96c6\u5408\u3002\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u5728Http\u8bf7\u6c42\u6267\u884c\u524d\u586b\u5145\u4e0a\u4e0b\u6587\u7684\u503c\uff0c\u4e5f\u53ef\u4ee5\u5728\u8bf7\u6c42\u6267\u884c\u5b8c\u6bd5\u540e\u68c0\u67e5\u4e0a\u4e0b\u6587\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>HttpContext<\/code>\u53ef\u4ee5\u5305\u542b\u4efb\u610f\u7c7b\u578b\u7684\u5bf9\u8c61\uff0c\u56e0\u6b64\u5982\u679c\u5728\u591a\u7ebf\u7a0b\u4e2d\u5171\u4eab\u4e0a\u4e0b\u6587\u4f1a\u4e0d\u5b89\u5168\u3002\u63a8\u8350\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u53ea\u5305\u542b\u81ea\u5df1\u7684http\u4e0a\u4e0b\u6587\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728Http\u8bf7\u6c42\u6267\u884c\u7684\u8fc7\u7a0b\u4e2d\uff0cHttpClient\u4f1a\u81ea\u52a8\u6dfb\u52a0\u4e0b\u9762\u7684\u5c5e\u6027\u5230Http\u4e0a\u4e0b\u6587\u4e2d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><code>HttpConnection<\/code>\u7684\u5b9e\u4f8b\uff0c\u8868\u793a\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u8fde\u63a5<\/li><li><code>HttpHost<\/code>\u7684\u5b9e\u4f8b\uff0c\u8868\u793a\u8981\u8fde\u63a5\u7684\u76ee\u6807\u670d\u52a1\u5668<\/li><li><code>HttpRoute<\/code>\u7684\u5b9e\u4f8b\uff0c\u8868\u793a\u5168\u90e8\u7684\u8fde\u63a5\u8def\u7531<\/li><li><code>HttpRequest<\/code>\u7684\u5b9e\u4f8b\uff0c\u8868\u793aHttp\u8bf7\u6c42\u3002\u5728\u6267\u884c\u4e0a\u4e0b\u6587\u4e2d\uff0c\u6700\u7ec8\u7684HttpRequest\u5bf9\u8c61\u4f1a\u4ee3\u8868http\u6d88\u606f\u7684\u72b6\u6001\u3002Http\/1.0\u548cHttp\/1.1\u90fd\u9ed8\u8ba4\u4f7f\u7528\u76f8\u5bf9\u7684uri\u3002\u4f46\u662f\u5982\u679c\u4f7f\u7528\u4e86\u975e\u96a7\u9053\u6a21\u5f0f\u7684\u4ee3\u7406\u670d\u52a1\u5668\uff0c\u5c31\u4f1a\u4f7f\u7528\u7edd\u5bf9\u8def\u5f84\u7684uri\u3002<\/li><li><code>HttpResponse<\/code>\u7684\u5b9e\u4f8b\uff0c\u8868\u793aHttp\u54cd\u5e94<\/li><li><code>java.lang.Boolean<\/code>\u5bf9\u8c61\uff0c\u8868\u793a\u662f\u5426\u8bf7\u6c42\u88ab\u6210\u529f\u7684\u53d1\u9001\u7ed9\u76ee\u6807\u670d\u52a1\u5668<\/li><li><code>RequestConfig<\/code>\u5bf9\u8c61\uff0c\u8868\u793ahttp request\u7684\u914d\u7f6e\u4fe1\u606f<\/li><li><code>java.util.List&lt;Uri&gt;<\/code>\u5bf9\u8c61\uff0c\u8868\u793aHttp\u54cd\u5e94\u4e2d\u7684\u6240\u6709\u91cd\u5b9a\u5411\u5730\u5740<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528<code>HttpClientContext<\/code>\u8fd9\u4e2a\u9002\u914d\u5668\u6765\u7b80\u5316\u548c\u4e0a\u4e0b\u6587\u4ea4\u4e92\u7684\u8fc7\u7a0b\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>HttpContext&nbsp;context&nbsp;=&nbsp;&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>HttpClientContext&nbsp;clientContext&nbsp;=&nbsp;HttpClientContext.adapt(context);&nbsp;&nbsp;<\/li><li>HttpHost&nbsp;target&nbsp;=&nbsp;clientContext.getTargetHost();&nbsp;&nbsp;<\/li><li>HttpRequest&nbsp;request&nbsp;=&nbsp;clientContext.getRequest();&nbsp;&nbsp;<\/li><li>HttpResponse&nbsp;response&nbsp;=&nbsp;clientContext.getResponse();&nbsp;&nbsp;<\/li><li>RequestConfig&nbsp;config&nbsp;=&nbsp;clientContext.getRequestConfig();&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u4e00\u4e2a\u903b\u8f91\u4f1a\u8bdd\u4e2d\u7684\u591a\u4e2aHttp\u8bf7\u6c42\uff0c\u5e94\u8be5\u4f7f\u7528\u76f8\u540c\u7684Http\u4e0a\u4e0b\u6587\u6765\u6267\u884c\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u81ea\u52a8\u5730\u5728http\u8bf7\u6c42\u4e2d\u4f20\u9012\u4f1a\u8bdd\u4e0a\u4e0b\u6587\u548c\u72b6\u6001\u4fe1\u606f\u3002<br>\u5728\u4e0b\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u5728\u5f00\u5934\u8bbe\u7f6e\u7684\u53c2\u6570\uff0c\u4f1a\u88ab\u4fdd\u5b58\u5728\u4e0a\u4e0b\u6587\u4e2d\uff0c\u5e76\u4e14\u4f1a\u5e94\u7528\u5230\u540e\u7eed\u7684http\u8bf7\u6c42\u4e2d\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.createDefault();&nbsp;&nbsp;<\/li><li>RequestConfig&nbsp;requestConfig&nbsp;=&nbsp;RequestConfig.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setSocketTimeout(1000)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setConnectTimeout(1000)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget1&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;http:\/\/localhost\/1&#8221;);&nbsp;&nbsp;<\/li><li>httpget1.setConfig(requestConfig);&nbsp;&nbsp;<\/li><li>CloseableHttpResponse&nbsp;response1&nbsp;=&nbsp;httpclient.execute(httpget1,&nbsp;context);&nbsp;&nbsp;<\/li><li>try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;HttpEntity&nbsp;entity1&nbsp;=&nbsp;response1.getEntity();&nbsp;&nbsp;<\/li><li>}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;response1.close();&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget2&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;http:\/\/localhost\/2&#8221;);&nbsp;&nbsp;<\/li><li>CloseableHttpResponse&nbsp;response2&nbsp;=&nbsp;httpclient.execute(httpget2,&nbsp;context);&nbsp;&nbsp;<\/li><li>try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;HttpEntity&nbsp;entity2&nbsp;=&nbsp;response2.getEntity();&nbsp;&nbsp;<\/li><li>}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;response2.close();&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">1.4. \u5f02\u5e38\u5904\u7406<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u4f1a\u88ab\u629b\u51fa\u4e24\u79cd\u7c7b\u578b\u7684\u5f02\u5e38\uff0c\u4e00\u79cd\u662f<code>java.io.IOException<\/code>\uff0c\u5f53\u9047\u5230I\/O\u5f02\u5e38\u65f6\u629b\u51fa\uff08socket\u8d85\u65f6\uff0c\u6216\u8005socket\u88ab\u91cd\u7f6e\uff09;\u53e6\u4e00\u79cd\u662f<code>HttpException<\/code>,\u8868\u793aHttp\u5931\u8d25\uff0c\u5982Http\u534f\u8bae\u4f7f\u7528\u4e0d\u6b63\u786e\u3002\u901a\u5e38\u8ba4\u4e3a\uff0cI\/O\u9519\u8bef\u65f6\u4e0d\u81f4\u547d\u3001\u53ef\u4fee\u590d\u7684\uff0c\u800cHttp\u534f\u8bae\u9519\u8bef\u662f\u81f4\u547d\u4e86\uff0c\u4e0d\u80fd\u81ea\u52a8\u4fee\u590d\u7684\u9519\u8bef\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1.4.1.HTTP\u4f20\u8f93\u5b89\u5168<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Http\u534f\u8bae\u4e0d\u80fd\u6ee1\u8db3\u6240\u6709\u7c7b\u578b\u7684\u5e94\u7528\u573a\u666f\uff0c\u6211\u4eec\u9700\u8981\u77e5\u9053\u8fd9\u70b9\u3002Http\u662f\u4e2a\u7b80\u5355\u7684\u9762\u5411\u534f\u8bae\u7684\u8bf7\u6c42\/\u54cd\u5e94\u7684\u534f\u8bae\uff0c\u5f53\u521d\u5b83\u88ab\u8bbe\u8ba1\u7528\u6765\u652f\u6301\u9759\u6001\u6216\u8005\u52a8\u6001\u751f\u6210\u7684\u5185\u5bb9\u68c0\u7d22\uff0c\u4e4b\u524d\u4ece\u6765\u6ca1\u6709\u4eba\u60f3\u8fc7\u8ba9\u5b83\u652f\u6301\u4e8b\u52a1\u6027\u64cd\u4f5c\u3002\u4f8b\u5982\uff0cHttp\u670d\u52a1\u5668\u6210\u529f\u63a5\u6536\u3001\u5904\u7406\u8bf7\u6c42\u540e\uff0c\u751f\u6210\u54cd\u5e94\u6d88\u606f\uff0c\u5e76\u4e14\u628a\u72b6\u6001\u7801\u53d1\u9001\u7ed9\u5ba2\u6237\u7aef\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u662fHttp\u534f\u8bae\u5e94\u8be5\u4fdd\u8bc1\u7684\u3002\u4f46\u662f\uff0c\u5982\u679c\u5ba2\u6237\u7aef\u7531\u4e8e\u8bfb\u53d6\u8d85\u65f6\u3001\u53d6\u6d88\u8bf7\u6c42\u6216\u8005\u7cfb\u7edf\u5d29\u6e83\u5bfc\u81f4\u63a5\u6536\u54cd\u5e94\u5931\u8d25\uff0c\u670d\u52a1\u5668\u4e0d\u4f1a\u56de\u6eda\u8fd9\u4e00\u4e8b\u52a1\u3002\u5982\u679c\u5ba2\u6237\u7aef\u91cd\u65b0\u53d1\u9001\u8fd9\u4e2a\u8bf7\u6c42\uff0c\u670d\u52a1\u5668\u5c31\u4f1a\u91cd\u590d\u7684\u89e3\u6790\u3001\u6267\u884c\u8fd9\u4e2a\u4e8b\u52a1\u3002\u5728\u4e00\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u5e94\u7528\u7a0b\u5e8f\u7684\u6570\u636e\u635f\u574f\u548c\u5e94\u7528\u7a0b\u5e8f\u7684\u72b6\u6001\u4e0d\u4e00\u81f4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5373\u4f7fHttp\u5f53\u521d\u8bbe\u8ba1\u662f\u4e0d\u652f\u6301\u4e8b\u52a1\u64cd\u4f5c\uff0c\u4f46\u662f\u5b83\u4ecd\u65e7\u53ef\u4ee5\u4f5c\u4e3a\u4f20\u8f93\u534f\u8bae\u4e3a\u67d0\u4e9b\u5173\u952e\u7a0b\u5e8f\u63d0\u4f9b\u670d\u52a1\u3002\u4e3a\u4e86\u4fdd\u8bc1Http\u4f20\u8f93\u5c42\u7684\u5b89\u5168\u6027\uff0c\u7cfb\u7edf\u5fc5\u987b\u4fdd\u8bc1\u5e94\u7528\u5c42\u4e0a\u7684http\u65b9\u6cd5\u7684\u5e42\u7b49\u6027\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1.4.2.\u65b9\u6cd5\u7684\u5e42\u7b49\u6027<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">HTTP\/1.1\u89c4\u8303\u4e2d\u662f\u8fd9\u6837\u5b9a\u4e49\u5e42\u7b49\u65b9\u6cd5\u7684\uff0cMethods can also have the property of \u201cidempotence\u201d in that (aside from error or expiration issues) the side-effects of N &gt; 0 identical requests is the same as for a single request\u3002\u7528\u5176\u4ed6\u8bdd\u6765\u8bf4\uff0c\u5e94\u7528\u7a0b\u5e8f\u9700\u8981\u6b63\u786e\u5730\u5904\u7406\u540c\u4e00\u65b9\u6cd5\u591a\u6b21\u6267\u884c\u9020\u6210\u7684\u5f71\u54cd\u3002\u6dfb\u52a0\u4e00\u4e2a\u5177\u6709\u552f\u4e00\u6027\u7684id\u5c31\u80fd\u907f\u514d\u91cd\u590d\u6267\u884c\u540c\u4e00\u4e2a\u903b\u8f91\u8bf7\u6c42\uff0c\u95ee\u9898\u89e3\u51b3\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bf7\u77e5\u6653\uff0c\u8fd9\u4e2a\u95ee\u9898\u4e0d\u53ea\u662fHttpClient\u624d\u4f1a\u6709\uff0c\u57fa\u4e8e\u6d4f\u89c8\u5668\u7684\u5e94\u7528\u7a0b\u5e8f\u4e5f\u4f1a\u9047\u5230Http\u65b9\u6cd5\u4e0d\u5e42\u7b49\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u9ed8\u8ba4\u628a\u975e\u5b9e\u4f53\u65b9\u6cd5<code>get<\/code>\u3001<code>head<\/code>\u65b9\u6cd5\u770b\u505a\u5e42\u7b49\u65b9\u6cd5\uff0c\u628a\u5b9e\u4f53\u65b9\u6cd5<code>post<\/code>\u3001<code>put<\/code>\u65b9\u6cd5\u770b\u505a\u975e\u5e42\u7b49\u65b9\u6cd5\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1.4.3.\u5f02\u5e38\u81ea\u52a8\u4fee\u590d<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cHttpClient\u4f1a\u5c1d\u8bd5\u81ea\u52a8\u4fee\u590dI\/O\u5f02\u5e38\u3002\u8fd9\u79cd\u81ea\u52a8\u4fee\u590d\u4ec5\u9650\u4e8e\u4fee\u590d\u51e0\u4e2a\u516c\u8ba4\u5b89\u5168\u7684\u5f02\u5e38\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>HttpClient\u4e0d\u4f1a\u5c1d\u8bd5\u4fee\u590d\u4efb\u4f55\u903b\u8f91\u6216\u8005http\u534f\u8bae\u9519\u8bef\uff08\u5373\u4eceHttpException\u884d\u751f\u51fa\u6765\u7684\u5f02\u5e38\uff09\u3002<\/li><li>HttpClient\u4f1a\u81ea\u52a8\u518d\u6b21\u53d1\u9001\u5e42\u7b49\u7684\u65b9\u6cd5\uff08\u5982\u679c\u9996\u6b21\u6267\u884c\u5931\u8d25)\u3002<\/li><li>HttpClient\u4f1a\u81ea\u52a8\u518d\u6b21\u53d1\u9001\u9047\u5230transport\u5f02\u5e38\u7684\u65b9\u6cd5\uff0c\u524d\u63d0\u662fHttp\u8bf7\u6c42\u4ecd\u65e7\u4fdd\u6301\u7740\u8fde\u63a5\uff08\u4f8b\u5982http\u8bf7\u6c42\u6ca1\u6709\u5168\u90e8\u53d1\u9001\u7ed9\u76ee\u6807\u670d\u52a1\u5668\uff0cHttpClient\u4f1a\u518d\u6b21\u5c1d\u8bd5\u53d1\u9001\uff09\u3002<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">1.4.4.\u8bf7\u6c42\u91cd\u8bd5HANDLER<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u8981\u81ea\u5b9a\u4e49\u5f02\u5e38\u5904\u7406\u673a\u5236\uff0c\u6211\u4eec\u9700\u8981\u5b9e\u73b0<code>HttpRequestRetryHandler<\/code>\u63a5\u53e3\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>HttpRequestRetryHandler&nbsp;myRetryHandler&nbsp;=&nbsp;new&nbsp;HttpRequestRetryHandler()&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;boolean&nbsp;retryRequest(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IOException&nbsp;exception,&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;int&nbsp;executionCount,&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HttpContext&nbsp;context)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(executionCount&nbsp;&gt;=&nbsp;5)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;Do&nbsp;not&nbsp;retry&nbsp;if&nbsp;over&nbsp;max&nbsp;retry&nbsp;count&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;false;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(exception&nbsp;instanceof&nbsp;InterruptedIOException)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;Timeout&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;false;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(exception&nbsp;instanceof&nbsp;UnknownHostException)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;Unknown&nbsp;host&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;false;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(exception&nbsp;instanceof&nbsp;ConnectTimeoutException)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;Connection&nbsp;refused&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;false;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(exception&nbsp;instanceof&nbsp;SSLException)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;SSL&nbsp;handshake&nbsp;exception&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;false;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HttpClientContext&nbsp;clientContext&nbsp;=&nbsp;HttpClientContext.adapt(context);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HttpRequest&nbsp;request&nbsp;=&nbsp;clientContext.getRequest();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;boolean&nbsp;idempotent&nbsp;=&nbsp;!(request&nbsp;instanceof&nbsp;HttpEntityEnclosingRequest);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(idempotent)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;Retry&nbsp;if&nbsp;the&nbsp;request&nbsp;is&nbsp;considered&nbsp;idempotent&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;true;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;false;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>};&nbsp;&nbsp;<\/li><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setRetryHandler(myRetryHandler)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">1.5.\u7ec8\u6b62\u8bf7\u6c42<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6709\u65f6\u5019\u7531\u4e8e\u76ee\u6807\u670d\u52a1\u5668\u8d1f\u8f7d\u8fc7\u9ad8\u6216\u8005\u5ba2\u6237\u7aef\u76ee\u524d\u6709\u592a\u591a\u8bf7\u6c42\u79ef\u538b\uff0chttp\u8bf7\u6c42\u4e0d\u80fd\u5728\u6307\u5b9a\u65f6\u95f4\u5185\u6267\u884c\u5b8c\u6bd5\u3002\u8fd9\u65f6\u5019\u7ec8\u6b62\u8fd9\u4e2a\u8bf7\u6c42\uff0c\u91ca\u653e\u963b\u585eI\/O\u7684\u8fdb\u7a0b\uff0c\u5c31\u663e\u5f97\u5f88\u5fc5\u8981\u3002\u901a\u8fc7HttpClient\u6267\u884c\u7684Http\u8bf7\u6c42\uff0c\u5728\u4efb\u4f55\u72b6\u6001\u4e0b\u90fd\u80fd\u901a\u8fc7\u8c03\u7528<code>HttpUriRequest<\/code>\u7684<code>abort()<\/code>\u65b9\u6cd5\u6765\u7ec8\u6b62\u3002\u8fd9\u4e2a\u65b9\u6cd5\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u5e76\u4e14\u80fd\u5728\u4efb\u4f55\u7ebf\u7a0b\u4e2d\u8c03\u7528\u3002\u5f53Http\u8bf7\u6c42\u88ab\u7ec8\u6b62\u4e86\uff0c\u672c\u7ebf\u7a0b\uff08\u5373\u4f7f\u73b0\u5728\u6b63\u5728\u963b\u585eI\/O\uff09\u4e5f\u4f1a\u901a\u8fc7\u629b\u51fa\u4e00\u4e2a<code>InterruptedIOException<\/code>\u5f02\u5e38\uff0c\u6765\u91ca\u653e\u8d44\u6e90\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1.6. Http\u534f\u8bae\u62e6\u622a\u5668<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HTTP\u534f\u8bae\u62e6\u622a\u5668\u662f\u4e00\u79cd\u5b9e\u73b0\u4e00\u4e2a\u7279\u5b9a\u7684\u65b9\u9762\u7684HTTP\u534f\u8bae\u7684\u4ee3\u7801\u7a0b\u5e8f\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u534f\u8bae\u62e6\u622a\u5668\u4f1a\u5c06\u4e00\u4e2a\u6216\u591a\u4e2a\u5934\u6d88\u606f\u52a0\u5165\u5230\u63a5\u53d7\u6216\u8005\u53d1\u9001\u7684\u6d88\u606f\u4e2d\u3002\u534f\u8bae\u62e6\u622a\u5668\u4e5f\u53ef\u4ee5\u64cd\u4f5c\u6d88\u606f\u7684\u5185\u5bb9\u5b9e\u4f53\u2014\u6d88\u606f\u5185\u5bb9\u7684\u538b\u7f29\/\u89e3\u538b\u7f29\u5c31\u662f\u4e2a\u5f88\u597d\u7684\u4f8b\u5b50\u3002\u901a\u5e38\uff0c\u8fd9\u662f\u901a\u8fc7\u4f7f\u7528\u201c\u88c5\u9970\u201d\u5f00\u53d1\u6a21\u5f0f\uff0c\u4e00\u4e2a\u5305\u88c5\u5b9e\u4f53\u7c7b\u7528\u4e8e\u88c5\u9970\u539f\u6765\u7684\u5b9e\u4f53\u6765\u5b9e\u73b0\u3002\u4e00\u4e2a\u62e6\u622a\u5668\u53ef\u4ee5\u5408\u5e76\uff0c\u5f62\u6210\u4e00\u4e2a\u903b\u8f91\u5355\u5143\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u534f\u8bae\u62e6\u622a\u5668\u53ef\u4ee5\u901a\u8fc7\u5171\u4eab\u4fe1\u606f\u534f\u4f5c\u2014\u2014\u6bd4\u5982\u5904\u7406\u72b6\u6001\u2014\u2014\u901a\u8fc7HTTP\u6267\u884c\u4e0a\u4e0b\u6587\u3002\u534f\u8bae\u62e6\u622a\u5668\u53ef\u4ee5\u4f7f\u7528Http\u4e0a\u4e0b\u6587\u5b58\u50a8\u4e00\u4e2a\u6216\u8005\u591a\u4e2a\u8fde\u7eed\u8bf7\u6c42\u7684\u5904\u7406\u72b6\u6001\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u5e38\uff0c\u53ea\u8981\u62e6\u622a\u5668\u4e0d\u4f9d\u8d56\u4e8e\u4e00\u4e2a\u7279\u5b9a\u72b6\u6001\u7684http\u4e0a\u4e0b\u6587\uff0c\u90a3\u4e48\u62e6\u622a\u6267\u884c\u7684\u987a\u5e8f\u5c31\u65e0\u6240\u8c13\u3002\u5982\u679c\u534f\u8bae\u62e6\u622a\u5668\u6709\u76f8\u4e92\u4f9d\u8d56\u5173\u7cfb\uff0c\u5fc5\u987b\u4ee5\u7279\u5b9a\u7684\u987a\u5e8f\u6267\u884c\uff0c\u90a3\u4e48\u5b83\u4eec\u5e94\u8be5\u6309\u7167\u7279\u5b9a\u7684\u987a\u5e8f\u52a0\u5165\u5230\u534f\u8bae\u5904\u7406\u5668\u4e2d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u534f\u8bae\u5904\u7406\u5668\u5fc5\u987b\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\u3002\u7c7b\u4f3c\u4e8eservlets\uff0c\u534f\u8bae\u62e6\u622a\u5668\u4e0d\u5e94\u8be5\u4f7f\u7528\u53d8\u91cf\u5b9e\u4f53\uff0c\u9664\u975e\u8bbf\u95ee\u8fd9\u4e9b\u53d8\u91cf\u662f\u540c\u6b65\u7684\uff08\u7ebf\u7a0b\u5b89\u5168\u7684\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u662f\u4e2a\u4f8b\u5b50\uff0c\u8bb2\u8ff0\u4e86\u672c\u5730\u7684\u4e0a\u4e0b\u6587\u65f6\u5982\u4f55\u5728\u8fde\u7eed\u8bf7\u6c42\u4e2d\u8bb0\u5f55\u5904\u7406\u72b6\u6001\u7684\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.addInterceptorLast(new&nbsp;HttpRequestInterceptor()&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;void&nbsp;process(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;final&nbsp;HttpRequest&nbsp;request,&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;final&nbsp;HttpContext&nbsp;context)&nbsp;throws&nbsp;HttpException,&nbsp;IOException&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;AtomicInteger&nbsp;count&nbsp;=&nbsp;(AtomicInteger)&nbsp;context.getAttribute(&#8220;count&#8221;);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;request.addHeader(&#8220;Count&#8221;,&nbsp;Integer.toString(count.getAndIncrement()));&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;})&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><li>AtomicInteger&nbsp;count&nbsp;=&nbsp;new&nbsp;AtomicInteger(1);&nbsp;&nbsp;<\/li><li>HttpClientContext&nbsp;localContext&nbsp;=&nbsp;HttpClientContext.create();&nbsp;&nbsp;<\/li><li>localContext.setAttribute(&#8220;count&#8221;,&nbsp;count);&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;http:\/\/localhost\/&#8221;);&nbsp;&nbsp;<\/li><li>for&nbsp;(int&nbsp;i&nbsp;=&nbsp;0;&nbsp;i&nbsp;&lt;&nbsp;10;&nbsp;i++)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;CloseableHttpResponse&nbsp;response&nbsp;=&nbsp;httpclient.execute(httpget,&nbsp;localContext);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HttpEntity&nbsp;entity&nbsp;=&nbsp;response.getEntity();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;response.close();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u9762\u4ee3\u7801\u5728\u53d1\u9001http\u8bf7\u6c42\u65f6\uff0c\u4f1a\u81ea\u52a8\u6dfb\u52a0Count\u8fd9\u4e2aheader\uff0c\u53ef\u4ee5\u4f7f\u7528wireshark\u6293\u5305\u67e5\u770b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1.7.1. \u91cd\u5b9a\u5411\u5904\u7406<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u4f1a\u81ea\u52a8\u5904\u7406\u6240\u6709\u7c7b\u578b\u7684\u91cd\u5b9a\u5411\uff0c\u9664\u4e86\u90a3\u4e9bHttp\u89c4\u8303\u660e\u786e\u7981\u6b62\u7684\u91cd\u5b9a\u5411\u3002See Other (status code 303) redirects on POST and PUT requests are converted to GET requests as required by the HTTP specification. \u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u81ea\u5b9a\u4e49\u7684\u91cd\u5b9a\u5411\u7b56\u7565\u6765\u653e\u677eHttp\u89c4\u8303\u5bf9Post\u65b9\u6cd5\u91cd\u5b9a\u5411\u7684\u9650\u5236\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>LaxRedirectStrategy&nbsp;redirectStrategy&nbsp;=&nbsp;new&nbsp;LaxRedirectStrategy();&nbsp;&nbsp;<\/li><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setRedirectStrategy(redirectStrategy)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u5728\u8bf7\u6c42\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0c\u7ecf\u5e38\u9700\u8981\u91cd\u5199\u8bf7\u6c42\u7684\u6d88\u606f\u3002 HTTP\/1.0\u548cHTTP\/1.1\u90fd\u9ed8\u8ba4\u4f7f\u7528\u76f8\u5bf9\u7684uri\u8def\u5f84\u3002\u540c\u6837\uff0c\u539f\u59cb\u7684\u8bf7\u6c42\u53ef\u80fd\u4f1a\u88ab\u4e00\u6b21\u6216\u8005\u591a\u6b21\u7684\u91cd\u5b9a\u5411\u3002\u6700\u7ec8\u7ed3\u5bf9\u8def\u5f84\u7684\u89e3\u91ca\u53ef\u4ee5\u4f7f\u7528\u6700\u521d\u7684\u8bf7\u6c42\u548c\u4e0a\u4e0b\u6587\u3002<code>URIUtils<\/code>\u7c7b\u7684<code>resolve<\/code>\u65b9\u6cd5\u53ef\u4ee5\u7528\u4e8e\u5c06\u62e6\u622a\u7684\u7edd\u5bf9\u8def\u5f84\u6784\u5efa\u6210\u6700\u7ec8\u7684\u8bf7\u6c42\u3002\u8fd9\u4e2a\u65b9\u6cd5\u5305\u542b\u4e86\u6700\u540e\u4e00\u4e2a\u5206\u7247\u6807\u8bc6\u7b26\u6216\u8005\u539f\u59cb\u8bf7\u6c42\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.createDefault();&nbsp;&nbsp;<\/li><li>HttpClientContext&nbsp;context&nbsp;=&nbsp;HttpClientContext.create();&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;http:\/\/localhost:8080\/&#8221;);&nbsp;&nbsp;<\/li><li>CloseableHttpResponse&nbsp;response&nbsp;=&nbsp;httpclient.execute(httpget,&nbsp;context);&nbsp;&nbsp;<\/li><li>try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;HttpHost&nbsp;target&nbsp;=&nbsp;context.getTargetHost();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;List&lt;URI&gt;&nbsp;redirectLocations&nbsp;=&nbsp;context.getRedirectLocations();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;URI&nbsp;location&nbsp;=&nbsp;URIUtils.resolve(httpget.getURI(),&nbsp;target,&nbsp;redirectLocations);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(&#8220;Final&nbsp;HTTP&nbsp;location:&nbsp;&#8221;&nbsp;+&nbsp;location.toASCIIString());&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;Expected&nbsp;to&nbsp;be&nbsp;an&nbsp;absolute&nbsp;URI&nbsp;&nbsp;<\/li><li>}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;response.close();&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h1 class=\"wp-block-heading\">\u7b2c\u4e8c\u7ae0 \u8fde\u63a5\u7ba1\u7406<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">2.1.\u6301\u4e45\u8fde\u63a5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e24\u4e2a\u4e3b\u673a\u5efa\u7acb\u8fde\u63a5\u7684\u8fc7\u7a0b\u662f\u5f88\u590d\u6742\u7684\u4e00\u4e2a\u8fc7\u7a0b\uff0c\u6d89\u53ca\u5230\u591a\u4e2a\u6570\u636e\u5305\u7684\u4ea4\u6362\uff0c\u5e76\u4e14\u4e5f\u5f88\u8017\u65f6\u95f4\u3002Http\u8fde\u63a5\u9700\u8981\u7684\u4e09\u6b21\u63e1\u624b\u5f00\u9500\u5f88\u5927\uff0c\u8fd9\u4e00\u5f00\u9500\u5bf9\u4e8e\u6bd4\u8f83\u5c0f\u7684http\u6d88\u606f\u6765\u8bf4\u66f4\u5927\u3002\u4f46\u662f\u5982\u679c\u6211\u4eec\u76f4\u63a5\u4f7f\u7528\u5df2\u7ecf\u5efa\u7acb\u597d\u7684http\u8fde\u63a5\uff0c\u8fd9\u6837\u82b1\u8d39\u5c31\u6bd4\u8f83\u5c0f\uff0c\u541e\u5410\u7387\u66f4\u5927\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HTTP\/1.1\u9ed8\u8ba4\u5c31\u652f\u6301Http\u8fde\u63a5\u590d\u7528\u3002\u517c\u5bb9HTTP\/1.0\u7684\u7ec8\u7aef\u4e5f\u53ef\u4ee5\u901a\u8fc7\u58f0\u660e\u6765\u4fdd\u6301\u8fde\u63a5\uff0c\u5b9e\u73b0\u8fde\u63a5\u590d\u7528\u3002HTTP\u4ee3\u7406\u4e5f\u53ef\u4ee5\u5728\u4e00\u5b9a\u65f6\u95f4\u5185\u4fdd\u6301\u8fde\u63a5\u4e0d\u91ca\u653e\uff0c\u65b9\u4fbf\u540e\u7eed\u5411\u8fd9\u4e2a\u4e3b\u673a\u53d1\u9001http\u8bf7\u6c42\u3002\u8fd9\u79cd\u4fdd\u6301\u8fde\u63a5\u4e0d\u91ca\u653e\u7684\u60c5\u51b5\u5b9e\u9645\u4e0a\u662f\u5efa\u7acb\u7684\u6301\u4e45\u8fde\u63a5\u3002HttpClient\u4e5f\u652f\u6301\u6301\u4e45\u8fde\u63a5\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.2.HTTP\u8fde\u63a5\u8def\u7531<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u65e2\u53ef\u4ee5\u76f4\u63a5\u3001\u53c8\u53ef\u4ee5\u901a\u8fc7\u591a\u4e2a\u4e2d\u8f6c\u8def\u7531\uff08hops\uff09\u548c\u76ee\u6807\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u3002HttpClient\u628a\u8def\u7531\u5206\u4e3a\u4e09\u79cdplain\uff08\u660e\u6587 \uff09\uff0ctunneled\uff08\u96a7\u9053\uff09\u548clayered\uff08\u5206\u5c42\uff09\u3002\u96a7\u9053\u8fde\u63a5\u4e2d\u4f7f\u7528\u7684\u591a\u4e2a\u4e2d\u95f4\u4ee3\u7406\u88ab\u79f0\u4f5c\u4ee3\u7406\u94fe\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5ba2\u6237\u7aef\u76f4\u63a5\u8fde\u63a5\u5230\u76ee\u6807\u4e3b\u673a\u6216\u8005\u53ea\u901a\u8fc7\u4e86\u4e00\u4e2a\u4e2d\u95f4\u4ee3\u7406\uff0c\u8fd9\u79cd\u5c31\u662fPlain\u8def\u7531\u3002\u5ba2\u6237\u7aef\u901a\u8fc7\u7b2c\u4e00\u4e2a\u4ee3\u7406\u5efa\u7acb\u8fde\u63a5\uff0c\u901a\u8fc7\u4ee3\u7406\u94fetunnelling\uff0c\u8fd9\u79cd\u60c5\u51b5\u5c31\u662fTunneled\u8def\u7531\u3002\u4e0d\u901a\u8fc7\u4e2d\u95f4\u4ee3\u7406\u7684\u8def\u7531\u4e0d\u53ef\u80fd\u65f6tunneled\u8def\u7531\u3002\u5ba2\u6237\u7aef\u5728\u4e00\u4e2a\u5df2\u7ecf\u5b58\u5728\u7684\u8fde\u63a5\u4e0a\u8fdb\u884c\u534f\u8bae\u5206\u5c42\uff0c\u8fd9\u6837\u5efa\u7acb\u8d77\u6765\u7684\u8def\u7531\u5c31\u662flayered\u8def\u7531\u3002\u534f\u8bae\u53ea\u80fd\u5728\u96a7\u9053\u2014&gt;\u76ee\u6807\u4e3b\u673a\uff0c\u6216\u8005\u76f4\u63a5\u8fde\u63a5\uff08\u6ca1\u6709\u4ee3\u7406\uff09\uff0c\u8fd9\u4e24\u79cd\u94fe\u8def\u4e0a\u8fdb\u884c\u5206\u5c42\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.2.1.\u8def\u7531\u8ba1\u7b97<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><code>RouteInfo<\/code>\u63a5\u53e3\u5305\u542b\u4e86\u6570\u636e\u5305\u53d1\u9001\u5230\u76ee\u6807\u4e3b\u673a\u8fc7\u7a0b\u4e2d\uff0c\u7ecf\u8fc7\u7684\u8def\u7531\u4fe1\u606f\u3002<code>HttpRoute<\/code>\u7c7b\u7ee7\u627f\u4e86<code>RouteInfo<\/code>\u63a5\u53e3\uff0c\u662f<code>RouteInfo<\/code>\u7684\u5177\u4f53\u5b9e\u73b0\uff0c\u8fd9\u4e2a\u7c7b\u662f\u4e0d\u5141\u8bb8\u4fee\u6539\u7684\u3002<code>HttpTracker<\/code>\u7c7b\u4e5f\u5b9e\u73b0\u4e86<code>RouteInfo<\/code>\u63a5\u53e3\uff0c\u5b83\u662f\u53ef\u53d8\u7684\uff0cHttpClient\u4f1a\u5728\u5185\u90e8\u4f7f\u7528\u8fd9\u4e2a\u7c7b\u6765\u63a2\u6d4b\u5230\u76ee\u6807\u4e3b\u673a\u7684\u5269\u4f59\u8def\u7531\u3002<code>HttpRouteDirector<\/code>\u662f\u4e2a\u8f85\u52a9\u7c7b\uff0c\u53ef\u4ee5\u5e2e\u52a9\u8ba1\u7b97\u6570\u636e\u5305\u7684\u4e0b\u4e00\u6b65\u8def\u7531\u4fe1\u606f\u3002\u8fd9\u4e2a\u7c7b\u4e5f\u662f\u5728HttpClient\u5185\u90e8\u4f7f\u7528\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>HttpRoutePlanner<\/code>\u63a5\u53e3\u53ef\u4ee5\u7528\u6765\u8868\u793a\u57fa\u4e8ehttp\u4e0a\u4e0b\u6587\u60c5\u51b5\u4e0b\uff0c\u5ba2\u6237\u7aef\u5230\u670d\u52a1\u5668\u7684\u8def\u7531\u8ba1\u7b97\u7b56\u7565\u3002HttpClient\u6709\u4e24\u4e2a<code>HttpRoutePlanner<\/code>\u7684\u5b9e\u73b0\u7c7b\u3002<code>SystemDefaultRoutePlanner<\/code>\u8fd9\u4e2a\u7c7b\u57fa\u4e8e<code>java.net.ProxySelector<\/code>\uff0c\u5b83\u9ed8\u8ba4\u4f7f\u7528jvm\u7684\u4ee3\u7406\u914d\u7f6e\u4fe1\u606f\uff0c\u8fd9\u4e2a\u914d\u7f6e\u4fe1\u606f\u4e00\u822c\u6765\u81ea\u7cfb\u7edf\u914d\u7f6e\u6216\u8005\u6d4f\u89c8\u5668\u914d\u7f6e\u3002<code>DefaultProxyRoutePlanner<\/code>\u8fd9\u4e2a\u7c7b\u65e2\u4e0d\u4f7f\u7528java\u672c\u8eab\u7684\u914d\u7f6e\uff0c\u4e5f\u4e0d\u4f7f\u7528\u7cfb\u7edf\u6216\u8005\u6d4f\u89c8\u5668\u7684\u914d\u7f6e\u3002\u5b83\u901a\u5e38\u901a\u8fc7\u9ed8\u8ba4\u4ee3\u7406\u6765\u8ba1\u7b97\u8def\u7531\u4fe1\u606f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.2.2. \u5b89\u5168\u7684HTTP\u8fde\u63a5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u9632\u6b62\u901a\u8fc7Http\u6d88\u606f\u4f20\u9012\u7684\u4fe1\u606f\u4e0d\u88ab\u672a\u6388\u6743\u7684\u7b2c\u4e09\u65b9\u83b7\u53d6\u3001\u622a\u83b7\uff0cHttp\u53ef\u4ee5\u4f7f\u7528SSL\/TLS\u534f\u8bae\u6765\u4fdd\u8bc1http\u4f20\u8f93\u5b89\u5168\uff0c\u8fd9\u4e2a\u534f\u8bae\u662f\u5f53\u524d\u4f7f\u7528\u6700\u5e7f\u7684\u3002\u5f53\u7136\u4e5f\u53ef\u4ee5\u4f7f\u7528\u5176\u4ed6\u7684\u52a0\u5bc6\u6280\u672f\u3002\u4f46\u662f\u901a\u5e38\u60c5\u51b5\u4e0b\uff0cHttp\u4fe1\u606f\u4f1a\u5728\u52a0\u5bc6\u7684SSL\/TLS\u8fde\u63a5\u4e0a\u8fdb\u884c\u4f20\u8f93\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.3. HTTP\u8fde\u63a5\u7ba1\u7406\u5668<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">2.3.1. \u7ba1\u7406\u8fde\u63a5\u548c\u8fde\u63a5\u7ba1\u7406\u5668<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Http\u8fde\u63a5\u662f\u590d\u6742\uff0c\u6709\u72b6\u6001\u7684\uff0c\u7ebf\u7a0b\u4e0d\u5b89\u5168\u7684\u5bf9\u8c61\uff0c\u6240\u4ee5\u5b83\u5fc5\u987b\u88ab\u59a5\u5584\u7ba1\u7406\u3002\u4e00\u4e2aHttp\u8fde\u63a5\u5728\u540c\u4e00\u65f6\u95f4\u53ea\u80fd\u88ab\u4e00\u4e2a\u7ebf\u7a0b\u8bbf\u95ee\u3002HttpClient\u4f7f\u7528\u4e00\u4e2a\u53eb\u505aHttp\u8fde\u63a5\u7ba1\u7406\u5668\u7684\u7279\u6b8a\u5b9e\u4f53\u7c7b\u6765\u7ba1\u7406Http\u8fde\u63a5\uff0c\u8fd9\u4e2a\u5b9e\u4f53\u7c7b\u8981\u5b9e\u73b0<code>HttpClientConnectionManager<\/code>\u63a5\u53e3\u3002Http\u8fde\u63a5\u7ba1\u7406\u5668\u5728\u65b0\u5efahttp\u8fde\u63a5\u65f6\uff0c\u4f5c\u4e3a\u5de5\u5382\u7c7b;\u7ba1\u7406\u6301\u4e45http\u8fde\u63a5\u7684\u751f\u547d\u5468\u671f;\u540c\u6b65\u6301\u4e45\u8fde\u63a5\uff08\u786e\u4fdd\u7ebf\u7a0b\u5b89\u5168\uff0c\u5373\u4e00\u4e2ahttp\u8fde\u63a5\u540c\u4e00\u65f6\u95f4\u53ea\u80fd\u88ab\u4e00\u4e2a\u7ebf\u7a0b\u8bbf\u95ee\uff09\u3002Http\u8fde\u63a5\u7ba1\u7406\u5668\u548c<code>ManagedHttpClientConnection<\/code>\u7684\u5b9e\u4f8b\u7c7b\u4e00\u8d77\u53d1\u6325\u4f5c\u7528\uff0c<code>ManagedHttpClientConnection<\/code>\u5b9e\u4f53\u7c7b\u53ef\u4ee5\u770b\u505ahttp\u8fde\u63a5\u7684\u4e00\u4e2a\u4ee3\u7406\u670d\u52a1\u5668\uff0c\u7ba1\u7406\u7740I\/O\u64cd\u4f5c\u3002\u5982\u679c\u4e00\u4e2aHttp\u8fde\u63a5\u88ab\u91ca\u653e\u6216\u8005\u88ab\u5b83\u7684\u6d88\u8d39\u8005\u660e\u786e\u8868\u793a\u8981\u5173\u95ed\uff0c\u90a3\u4e48\u5e95\u5c42\u7684\u8fde\u63a5\u5c31\u4f1a\u548c\u5b83\u7684\u4ee3\u7406\u8fdb\u884c\u5206\u79bb\uff0c\u5e76\u4e14\u8be5\u8fde\u63a5\u4f1a\u88ab\u4ea4\u8fd8\u7ed9\u8fde\u63a5\u7ba1\u7406\u5668\u3002\u8fd9\u662f\uff0c\u5373\u4f7f\u670d\u52a1\u6d88\u8d39\u8005\u4ecd\u7136\u6301\u6709\u4ee3\u7406\u7684\u5f15\u7528\uff0c\u5b83\u4e5f\u4e0d\u80fd\u518d\u6267\u884cI\/O\u64cd\u4f5c\uff0c\u6216\u8005\u66f4\u6539Http\u8fde\u63a5\u7684\u72b6\u6001\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u7684\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u4ece\u8fde\u63a5\u7ba1\u7406\u5668\u4e2d\u53d6\u5f97\u4e00\u4e2ahttp\u8fde\u63a5\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>HttpClientContext&nbsp;context&nbsp;=&nbsp;HttpClientContext.create();&nbsp;&nbsp;<\/li><li>HttpClientConnectionManager&nbsp;connMrg&nbsp;=&nbsp;new&nbsp;BasicHttpClientConnectionManager();&nbsp;&nbsp;<\/li><li>HttpRoute&nbsp;route&nbsp;=&nbsp;new&nbsp;HttpRoute(new&nbsp;HttpHost(&#8220;localhost&#8221;,&nbsp;80));&nbsp;&nbsp;<\/li><li>\/\/&nbsp;\u83b7\u53d6\u65b0\u7684\u8fde\u63a5.&nbsp;\u8fd9\u91cc\u53ef\u80fd\u8017\u8d39\u5f88\u591a\u65f6\u95f4&nbsp;&nbsp;<\/li><li>ConnectionRequest&nbsp;connRequest&nbsp;=&nbsp;connMrg.requestConnection(route,&nbsp;null);&nbsp;&nbsp;<\/li><li>\/\/&nbsp;10\u79d2\u8d85\u65f6&nbsp;&nbsp;<\/li><li>HttpClientConnection&nbsp;conn&nbsp;=&nbsp;connRequest.get(10,&nbsp;TimeUnit.SECONDS);&nbsp;&nbsp;<\/li><li>try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;\u5982\u679c\u521b\u5efa\u8fde\u63a5\u5931\u8d25&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(!conn.isOpen())&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;establish&nbsp;connection&nbsp;based&nbsp;on&nbsp;its&nbsp;route&nbsp;info&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;connMrg.connect(conn,&nbsp;route,&nbsp;1000,&nbsp;context);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;and&nbsp;mark&nbsp;it&nbsp;as&nbsp;route&nbsp;complete&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;connMrg.routeComplete(conn,&nbsp;route,&nbsp;context);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;\u8fdb\u884c\u81ea\u5df1\u7684\u64cd\u4f5c.&nbsp;&nbsp;<\/li><li>}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;connMrg.releaseConnection(conn,&nbsp;null,&nbsp;1,&nbsp;TimeUnit.MINUTES);&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u8981\u7ec8\u6b62\u8fde\u63a5\uff0c\u53ef\u4ee5\u8c03\u7528<code>ConnectionRequest<\/code>\u7684<code>cancel()<\/code>\u65b9\u6cd5\u3002\u8fd9\u4e2a\u65b9\u6cd5\u4f1a\u89e3\u9501\u88ab<code>ConnectionRequest<\/code>\u7c7b<code>get()<\/code>\u65b9\u6cd5\u963b\u585e\u7684\u7ebf\u7a0b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.3.2.\u7b80\u5355\u8fde\u63a5\u7ba1\u7406\u5668<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><code>BasicHttpClientConnectionManager<\/code>\u662f\u4e2a\u7b80\u5355\u7684\u8fde\u63a5\u7ba1\u7406\u5668\uff0c\u5b83\u4e00\u6b21\u53ea\u80fd\u7ba1\u7406\u4e00\u4e2a\u8fde\u63a5\u3002\u5c3d\u7ba1\u8fd9\u4e2a\u7c7b\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u5b83\u5728\u540c\u4e00\u65f6\u95f4\u4e5f\u53ea\u80fd\u88ab\u4e00\u4e2a\u7ebf\u7a0b\u4f7f\u7528\u3002<code>BasicHttpClientConnectionManager<\/code>\u4f1a\u5c3d\u91cf\u91cd\u7528\u65e7\u7684\u8fde\u63a5\u6765\u53d1\u9001\u540e\u7eed\u7684\u8bf7\u6c42\uff0c\u5e76\u4e14\u4f7f\u7528\u76f8\u540c\u7684\u8def\u7531\u3002\u5982\u679c\u540e\u7eed\u8bf7\u6c42\u7684\u8def\u7531\u548c\u65e7\u8fde\u63a5\u4e2d\u7684\u8def\u7531\u4e0d\u5339\u914d\uff0c<code>BasicHttpClientConnectionManager<\/code>\u5c31\u4f1a\u5173\u95ed\u5f53\u524d\u8fde\u63a5\uff0c\u4f7f\u7528\u8bf7\u6c42\u4e2d\u7684\u8def\u7531\u91cd\u65b0\u5efa\u7acb\u8fde\u63a5\u3002\u5982\u679c\u5f53\u524d\u7684\u8fde\u63a5\u6b63\u5728\u88ab\u5360\u7528\uff0c\u4f1a\u629b\u51fa<code>java.lang.IllegalStateException<\/code>\u5f02\u5e38\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.3.3.\u8fde\u63a5\u6c60\u7ba1\u7406\u5668<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u76f8\u5bf9<code>BasicHttpClientConnectionManager<\/code>\u6765\u8bf4\uff0c<code>PoolingHttpClientConnectionManager<\/code>\u662f\u4e2a\u66f4\u590d\u6742\u7684\u7c7b\uff0c\u5b83\u7ba1\u7406\u7740\u8fde\u63a5\u6c60\uff0c\u53ef\u4ee5\u540c\u65f6\u4e3a\u5f88\u591a\u7ebf\u7a0b\u63d0\u4f9bhttp\u8fde\u63a5\u8bf7\u6c42\u3002Connections are pooled on a per route basis.\u5f53\u8bf7\u6c42\u4e00\u4e2a\u65b0\u7684\u8fde\u63a5\u65f6\uff0c\u5982\u679c\u8fde\u63a5\u6c60\u6709\u6709\u53ef\u7528\u7684\u6301\u4e45\u8fde\u63a5\uff0c\u8fde\u63a5\u7ba1\u7406\u5668\u5c31\u4f1a\u4f7f\u7528\u5176\u4e2d\u7684\u4e00\u4e2a\uff0c\u800c\u4e0d\u662f\u518d\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u8fde\u63a5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>PoolingHttpClientConnectionManager<\/code>\u7ef4\u62a4\u7684\u8fde\u63a5\u6570\u5728\u6bcf\u4e2a\u8def\u7531\u57fa\u7840\u548c\u603b\u6570\u4e0a\u90fd\u6709\u9650\u5236\u3002\u9ed8\u8ba4\uff0c\u6bcf\u4e2a\u8def\u7531\u57fa\u7840\u4e0a\u7684\u8fde\u63a5\u4e0d\u8d85\u8fc72\u4e2a\uff0c\u603b\u8fde\u63a5\u6570\u4e0d\u80fd\u8d85\u8fc720\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u8fd9\u4e2a\u9650\u5236\u53ef\u80fd\u4f1a\u592a\u5c0f\u4e86\uff0c\u5c24\u5176\u662f\u5f53\u670d\u52a1\u5668\u4e5f\u4f7f\u7528Http\u534f\u8bae\u65f6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u7684\u4f8b\u5b50\u6f14\u793a\u4e86\u5982\u679c\u8c03\u6574\u8fde\u63a5\u6c60\u7684\u53c2\u6570\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>PoolingHttpClientConnectionManager&nbsp;cm&nbsp;=&nbsp;new&nbsp;PoolingHttpClientConnectionManager();&nbsp;&nbsp;<\/li><li>\/\/&nbsp;Increase&nbsp;max&nbsp;total&nbsp;connection&nbsp;to&nbsp;200&nbsp;&nbsp;<\/li><li>cm.setMaxTotal(200);&nbsp;&nbsp;<\/li><li>\/\/&nbsp;Increase&nbsp;default&nbsp;max&nbsp;connection&nbsp;per&nbsp;route&nbsp;to&nbsp;20&nbsp;&nbsp;<\/li><li>cm.setDefaultMaxPerRoute(20);&nbsp;&nbsp;<\/li><li>\/\/&nbsp;Increase&nbsp;max&nbsp;connections&nbsp;for&nbsp;localhost:80&nbsp;to&nbsp;50&nbsp;&nbsp;<\/li><li>HttpHost&nbsp;localhost&nbsp;=&nbsp;new&nbsp;HttpHost(&#8220;locahost&#8221;,&nbsp;80);&nbsp;&nbsp;<\/li><li>cm.setMaxPerRoute(new&nbsp;HttpRoute(localhost),&nbsp;50);&nbsp;&nbsp;<\/li><li>CloseableHttpClient&nbsp;httpClient&nbsp;=&nbsp;HttpClients.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setConnectionManager(cm)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">2.3.4.\u5173\u95ed\u8fde\u63a5\u7ba1\u7406\u5668<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u4e00\u4e2aHttpClient\u7684\u5b9e\u4f8b\u4e0d\u5728\u4f7f\u7528\uff0c\u6216\u8005\u5df2\u7ecf\u8131\u79bb\u5b83\u7684\u4f5c\u7528\u8303\u56f4\uff0c\u6211\u4eec\u9700\u8981\u5173\u6389\u5b83\u7684\u8fde\u63a5\u7ba1\u7406\u5668\uff0c\u6765\u5173\u95ed\u6389\u6240\u6709\u7684\u8fde\u63a5\uff0c\u91ca\u653e\u6389\u8fd9\u4e9b\u8fde\u63a5\u5360\u7528\u7684\u7cfb\u7edf\u8d44\u6e90\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CloseableHttpClient&nbsp;httpClient&nbsp;=&nbsp;&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>httpClient.close();&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">2.4.\u591a\u7ebf\u7a0b\u8bf7\u6c42\u6267\u884c<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u4f7f\u7528\u4e86\u8bf7\u6c42\u8fde\u63a5\u6c60\u7ba1\u7406\u5668\uff08\u6bd4\u5982<code>PoolingClientConnectionManager<\/code>\uff09\u540e\uff0cHttpClient\u5c31\u53ef\u4ee5\u540c\u65f6\u6267\u884c\u591a\u4e2a\u7ebf\u7a0b\u7684\u8bf7\u6c42\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>PoolingClientConnectionManager<\/code>\u4f1a\u6839\u636e\u5b83\u7684\u914d\u7f6e\u6765\u5206\u914d\u8bf7\u6c42\u8fde\u63a5\u3002\u5982\u679c\u8fde\u63a5\u6c60\u4e2d\u7684\u6240\u6709\u8fde\u63a5\u90fd\u88ab\u5360\u7528\u4e86\uff0c\u90a3\u4e48\u540e\u7eed\u7684\u8bf7\u6c42\u5c31\u4f1a\u88ab\u963b\u585e\uff0c\u76f4\u5230\u6709\u8fde\u63a5\u88ab\u91ca\u653e\u56de\u8fde\u63a5\u6c60\u4e2d\u3002\u4e3a\u4e86\u9632\u6b62\u6c38\u8fdc\u963b\u585e\u7684\u60c5\u51b5\u53d1\u751f\uff0c\u6211\u4eec\u53ef\u4ee5\u628a<code>http.conn-manager.timeout<\/code>\u7684\u503c\u8bbe\u7f6e\u6210\u4e00\u4e2a\u6574\u6570\u3002\u5982\u679c\u5728\u8d85\u65f6\u65f6\u95f4\u5185\uff0c\u6ca1\u6709\u53ef\u7528\u8fde\u63a5\uff0c\u5c31\u4f1a\u629b\u51fa<code>ConnectionPoolTimeoutException<\/code>\u5f02\u5e38\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>PoolingHttpClientConnectionManager&nbsp;cm&nbsp;=&nbsp;new&nbsp;PoolingHttpClientConnectionManager();&nbsp;&nbsp;<\/li><li>CloseableHttpClient&nbsp;httpClient&nbsp;=&nbsp;HttpClients.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setConnectionManager(cm)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><li>\/\/&nbsp;URIs&nbsp;to&nbsp;perform&nbsp;GETs&nbsp;on&nbsp;&nbsp;<\/li><li>String[]&nbsp;urisToGet&nbsp;=&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&#8220;http:\/\/www.domain1.com\/&#8221;,&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&#8220;http:\/\/www.domain2.com\/&#8221;,&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&#8220;http:\/\/www.domain3.com\/&#8221;,&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&#8220;http:\/\/www.domain4.com\/&#8221;&nbsp;&nbsp;<\/li><li>};&nbsp;&nbsp;<\/li><li>\/\/&nbsp;create&nbsp;a&nbsp;thread&nbsp;for&nbsp;each&nbsp;URI&nbsp;&nbsp;<\/li><li>GetThread[]&nbsp;threads&nbsp;=&nbsp;new&nbsp;GetThread[urisToGet.length];&nbsp;&nbsp;<\/li><li>for&nbsp;(int&nbsp;i&nbsp;=&nbsp;0;&nbsp;i&nbsp;&lt;&nbsp;threads.length;&nbsp;i++)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;HttpGet&nbsp;httpget&nbsp;=&nbsp;new&nbsp;HttpGet(urisToGet[i]);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;threads[i]&nbsp;=&nbsp;new&nbsp;GetThread(httpClient,&nbsp;httpget);&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><li>\/\/&nbsp;start&nbsp;the&nbsp;threads&nbsp;&nbsp;<\/li><li>for&nbsp;(int&nbsp;j&nbsp;=&nbsp;0;&nbsp;j&nbsp;&lt;&nbsp;threads.length;&nbsp;j++)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;threads[j].start();&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><li>\/\/&nbsp;join&nbsp;the&nbsp;threads&nbsp;&nbsp;<\/li><li>for&nbsp;(int&nbsp;j&nbsp;=&nbsp;0;&nbsp;j&nbsp;&lt;&nbsp;threads.length;&nbsp;j++)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;threads[j].join();&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5373\u4f7fHttpClient\u7684\u5b9e\u4f8b\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u53ef\u4ee5\u88ab\u591a\u4e2a\u7ebf\u7a0b\u5171\u4eab\u8bbf\u95ee\uff0c\u4f46\u662f\u4ecd\u65e7\u63a8\u8350\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u8981\u6709\u81ea\u5df1\u4e13\u7528\u5b9e\u4f8b\u7684HttpContext\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u662fGetThread\u7c7b\u7684\u5b9a\u4e49\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>static&nbsp;class&nbsp;GetThread&nbsp;extends&nbsp;Thread&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;private&nbsp;final&nbsp;CloseableHttpClient&nbsp;httpClient;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;private&nbsp;final&nbsp;HttpContext&nbsp;context;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;private&nbsp;final&nbsp;HttpGet&nbsp;httpget;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;GetThread(CloseableHttpClient&nbsp;httpClient,&nbsp;HttpGet&nbsp;httpget)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;this.httpClient&nbsp;=&nbsp;httpClient;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;this.context&nbsp;=&nbsp;HttpClientContext.create();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;this.httpget&nbsp;=&nbsp;httpget;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;<a href=\"https:\/\/my.oschina.net\/u\/1162528\">@Override<\/a>&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;void&nbsp;run()&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CloseableHttpResponse&nbsp;response&nbsp;=&nbsp;httpClient.execute(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;httpget,&nbsp;context);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HttpEntity&nbsp;entity&nbsp;=&nbsp;response.getEntity();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;response.close();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;catch&nbsp;(ClientProtocolException&nbsp;ex)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;Handle&nbsp;protocol&nbsp;errors&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;catch&nbsp;(IOException&nbsp;ex)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;Handle&nbsp;I\/O&nbsp;errors&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">2.5. \u8fde\u63a5\u56de\u6536\u7b56\u7565<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ecf\u5178\u963b\u585eI\/O\u6a21\u578b\u7684\u4e00\u4e2a\u4e3b\u8981\u7f3a\u70b9\u5c31\u662f\u53ea\u6709\u5f53\u7ec4\u4fa7I\/O\u65f6\uff0csocket\u624d\u80fd\u5bf9I\/O\u4e8b\u4ef6\u505a\u51fa\u53cd\u5e94\u3002\u5f53\u8fde\u63a5\u88ab\u7ba1\u7406\u5668\u6536\u56de\u540e\uff0c\u8fd9\u4e2a\u8fde\u63a5\u4ecd\u7136\u5b58\u6d3b\uff0c\u4f46\u662f\u5374\u65e0\u6cd5\u76d1\u63a7socket\u7684\u72b6\u6001\uff0c\u4e5f\u65e0\u6cd5\u5bf9I\/O\u4e8b\u4ef6\u505a\u51fa\u53cd\u9988\u3002\u5982\u679c\u8fde\u63a5\u88ab\u670d\u52a1\u5668\u7aef\u5173\u95ed\u4e86\uff0c\u5ba2\u6237\u7aef\u76d1\u6d4b\u4e0d\u5230\u8fde\u63a5\u7684\u72b6\u6001\u53d8\u5316\uff08\u4e5f\u5c31\u65e0\u6cd5\u6839\u636e\u8fde\u63a5\u72b6\u6001\u7684\u53d8\u5316\uff0c\u5173\u95ed\u672c\u5730\u7684socket\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u4e3a\u4e86\u7f13\u89e3\u8fd9\u4e00\u95ee\u9898\u9020\u6210\u7684\u5f71\u54cd\uff0c\u4f1a\u5728\u4f7f\u7528\u67d0\u4e2a\u8fde\u63a5\u524d\uff0c\u76d1\u6d4b\u8fd9\u4e2a\u8fde\u63a5\u662f\u5426\u5df2\u7ecf\u8fc7\u65f6\uff0c\u5982\u679c\u670d\u52a1\u5668\u7aef\u5173\u95ed\u4e86\u8fde\u63a5\uff0c\u90a3\u4e48\u8fde\u63a5\u5c31\u4f1a\u5931\u6548\u3002\u8fd9\u79cd\u8fc7\u65f6\u68c0\u67e5\u5e76\u4e0d\u662f100%\u6709\u6548\uff0c\u5e76\u4e14\u4f1a\u7ed9\u6bcf\u4e2a\u8bf7\u6c42\u589e\u52a010\u523030\u6beb\u79d2\u989d\u5916\u5f00\u9500\u3002\u552f\u4e00\u4e00\u4e2a\u53ef\u884c\u7684\uff0c\u4e14does not involve a one thread per socket model for idle connections\u7684\u89e3\u51b3\u529e\u6cd5\uff0c\u662f\u5efa\u7acb\u4e00\u4e2a\u76d1\u63a7\u7ebf\u7a0b\uff0c\u6765\u4e13\u95e8\u56de\u6536\u7531\u4e8e\u957f\u65f6\u95f4\u4e0d\u6d3b\u52a8\u800c\u88ab\u5224\u5b9a\u4e3a\u5931\u6548\u7684\u8fde\u63a5\u3002\u8fd9\u4e2a\u76d1\u63a7\u7ebf\u7a0b\u53ef\u4ee5\u5468\u671f\u6027\u7684\u8c03\u7528<code>ClientConnectionManager<\/code>\u7c7b\u7684<code>closeExpiredConnections()<\/code>\u65b9\u6cd5\u6765\u5173\u95ed\u8fc7\u671f\u7684\u8fde\u63a5\uff0c\u56de\u6536\u8fde\u63a5\u6c60\u4e2d\u88ab\u5173\u95ed\u7684\u8fde\u63a5\u3002\u5b83\u4e5f\u53ef\u4ee5\u9009\u62e9\u6027\u7684\u8c03\u7528<code>ClientConnectionManager<\/code>\u7c7b\u7684<code>closeIdleConnections()<\/code>\u65b9\u6cd5\u6765\u5173\u95ed\u4e00\u6bb5\u65f6\u95f4\u5185\u4e0d\u6d3b\u52a8\u7684\u8fde\u63a5\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>public&nbsp;static&nbsp;class&nbsp;IdleConnectionMonitorThread&nbsp;extends&nbsp;Thread&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;private&nbsp;final&nbsp;HttpClientConnectionManager&nbsp;connMgr;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;private&nbsp;volatile&nbsp;boolean&nbsp;shutdown;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;IdleConnectionMonitorThread(HttpClientConnectionManager&nbsp;connMgr)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;super();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;this.connMgr&nbsp;=&nbsp;connMgr;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;<a href=\"https:\/\/my.oschina.net\/u\/1162528\">@Override<\/a>&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;void&nbsp;run()&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;while&nbsp;(!shutdown)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;synchronized&nbsp;(this)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;wait(5000);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;Close&nbsp;expired&nbsp;connections&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;connMgr.closeExpiredConnections();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;Optionally,&nbsp;close&nbsp;connections&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;that&nbsp;have&nbsp;been&nbsp;idle&nbsp;longer&nbsp;than&nbsp;30&nbsp;sec&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;connMgr.closeIdleConnections(30,&nbsp;TimeUnit.SECONDS);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;catch&nbsp;(InterruptedException&nbsp;ex)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;terminate&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;void&nbsp;shutdown()&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;shutdown&nbsp;=&nbsp;true;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;synchronized&nbsp;(this)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;notifyAll();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">2.6. \u8fde\u63a5\u5b58\u6d3b\u7b56\u7565<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Http\u89c4\u8303\u6ca1\u6709\u89c4\u5b9a\u4e00\u4e2a\u6301\u4e45\u8fde\u63a5\u5e94\u8be5\u4fdd\u6301\u5b58\u6d3b\u591a\u4e45\u3002\u6709\u4e9bHttp\u670d\u52a1\u5668\u4f7f\u7528\u975e\u6807\u51c6\u7684<code>Keep-Alive<\/code>\u5934\u6d88\u606f\u548c\u5ba2\u6237\u7aef\u8fdb\u884c\u4ea4\u4e92\uff0c\u670d\u52a1\u5668\u7aef\u4f1a\u4fdd\u6301\u6570\u79d2\u65f6\u95f4\u5185\u4fdd\u6301\u8fde\u63a5\u3002HttpClient\u4e5f\u4f1a\u5229\u7528\u8fd9\u4e2a\u5934\u6d88\u606f\u3002\u5982\u679c\u670d\u52a1\u5668\u8fd4\u56de\u7684\u54cd\u5e94\u4e2d\u6ca1\u6709\u5305\u542b<code>Keep-Alive<\/code>\u5934\u6d88\u606f\uff0cHttpClient\u4f1a\u8ba4\u4e3a\u8fd9\u4e2a\u8fde\u63a5\u53ef\u4ee5\u6c38\u8fdc\u4fdd\u6301\u3002\u7136\u800c\uff0c\u5f88\u591a\u670d\u52a1\u5668\u90fd\u4f1a\u5728\u4e0d\u901a\u77e5\u5ba2\u6237\u7aef\u7684\u60c5\u51b5\u4e0b\uff0c\u5173\u95ed\u4e00\u5b9a\u65f6\u95f4\u5185\u4e0d\u6d3b\u52a8\u7684\u8fde\u63a5\uff0c\u6765\u8282\u7701\u670d\u52a1\u5668\u8d44\u6e90\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u9ed8\u8ba4\u7684\u7b56\u7565\u663e\u5f97\u592a\u4e50\u89c2\uff0c\u6211\u4eec\u53ef\u80fd\u9700\u8981\u81ea\u5b9a\u4e49\u8fde\u63a5\u5b58\u6d3b\u7b56\u7565\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>ConnectionKeepAliveStrategy&nbsp;myStrategy&nbsp;=&nbsp;new&nbsp;ConnectionKeepAliveStrategy()&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;long&nbsp;getKeepAliveDuration(HttpResponse&nbsp;response,&nbsp;HttpContext&nbsp;context)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;Honor&nbsp;&#8216;keep-alive&#8217;&nbsp;header&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HeaderElementIterator&nbsp;it&nbsp;=&nbsp;new&nbsp;BasicHeaderElementIterator(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;response.headerIterator(HTTP.CONN_KEEP_ALIVE));&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;while&nbsp;(it.hasNext())&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HeaderElement&nbsp;he&nbsp;=&nbsp;it.nextElement();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;String&nbsp;param&nbsp;=&nbsp;he.getName();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;String&nbsp;value&nbsp;=&nbsp;he.getValue();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(value&nbsp;!=&nbsp;null&nbsp;&amp;&amp;&nbsp;param.equalsIgnoreCase(&#8220;timeout&#8221;))&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;Long.parseLong(value)&nbsp;*&nbsp;1000;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;catch(NumberFormatException&nbsp;ignore)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HttpHost&nbsp;target&nbsp;=&nbsp;(HttpHost)&nbsp;context.getAttribute(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HttpClientContext.HTTP_TARGET_HOST);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(&#8220;www.naughty-server.com&#8221;.equalsIgnoreCase(target.getHostName()))&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;Keep&nbsp;alive&nbsp;for&nbsp;5&nbsp;seconds&nbsp;only&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;5&nbsp;*&nbsp;1000;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;else&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;otherwise&nbsp;keep&nbsp;alive&nbsp;for&nbsp;30&nbsp;seconds&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;30&nbsp;*&nbsp;1000;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>};&nbsp;&nbsp;<\/li><li>CloseableHttpClient&nbsp;client&nbsp;=&nbsp;HttpClients.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setKeepAliveStrategy(myStrategy)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">2.7.socket\u8fde\u63a5\u5de5\u5382<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Http\u8fde\u63a5\u4f7f\u7528<code>java.net.Socket<\/code>\u7c7b\u6765\u4f20\u8f93\u6570\u636e\u3002\u8fd9\u4f9d\u8d56\u4e8e<code>ConnectionSocketFactory<\/code>\u63a5\u53e3\u6765\u521b\u5efa\u3001\u521d\u59cb\u5316\u548c\u8fde\u63a5socket\u3002\u8fd9\u6837\u4e5f\u5c31\u5141\u8bb8HttpClient\u7684\u7528\u6237\u5728\u4ee3\u7801\u8fd0\u884c\u65f6\uff0c\u6307\u5b9asocket\u521d\u59cb\u5316\u7684\u4ee3\u7801\u3002<code>PlainConnectionSocketFactory<\/code>\u662f\u9ed8\u8ba4\u7684\u521b\u5efa\u3001\u521d\u59cb\u5316\u660e\u6587socket\uff08\u4e0d\u52a0\u5bc6\uff09\u7684\u5de5\u5382\u7c7b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u521b\u5efasocket\u548c\u4f7f\u7528socket\u8fde\u63a5\u5230\u76ee\u6807\u4e3b\u673a\u8fd9\u4e24\u4e2a\u8fc7\u7a0b\u662f\u5206\u79bb\u7684\uff0c\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u5728\u8fde\u63a5\u53d1\u751f\u963b\u585e\u65f6\uff0c\u5173\u95edsocket\u8fde\u63a5\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>HttpClientContext&nbsp;clientContext&nbsp;=&nbsp;HttpClientContext.create();&nbsp;&nbsp;<\/li><li>PlainConnectionSocketFactory&nbsp;sf&nbsp;=&nbsp;PlainConnectionSocketFactory.getSocketFactory();&nbsp;&nbsp;<\/li><li>Socket&nbsp;socket&nbsp;=&nbsp;sf.createSocket(clientContext);&nbsp;&nbsp;<\/li><li>int&nbsp;timeout&nbsp;=&nbsp;1000;&nbsp;\/\/ms&nbsp;&nbsp;<\/li><li>HttpHost&nbsp;target&nbsp;=&nbsp;new&nbsp;HttpHost(&#8220;localhost&#8221;);&nbsp;&nbsp;<\/li><li>InetSocketAddress&nbsp;remoteAddress&nbsp;=&nbsp;new&nbsp;InetSocketAddress(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;InetAddress.getByAddress(new&nbsp;byte[]&nbsp;{127,0,0,1}),&nbsp;80);&nbsp;&nbsp;<\/li><li>sf.connectSocket(timeout,&nbsp;socket,&nbsp;target,&nbsp;remoteAddress,&nbsp;null,&nbsp;clientContext);&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">2.7.1. \u5b89\u5168SOCKET\u5206\u5c42<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><code>LayeredConnectionSocketFactory<\/code>\u662f<code>ConnectionSocketFactory<\/code>\u7684\u62d3\u5c55\u63a5\u53e3\u3002\u5206\u5c42socket\u5de5\u5382\u7c7b\u53ef\u4ee5\u5728\u660e\u6587socket\u7684\u57fa\u7840\u4e0a\u521b\u5efasocket\u8fde\u63a5\u3002\u5206\u5c42socket\u4e3b\u8981\u7528\u4e8e\u5728\u4ee3\u7406\u670d\u52a1\u5668\u4e4b\u95f4\u521b\u5efa\u5b89\u5168socket\u3002HttpClient\u4f7f\u7528<code>SSLSocketFactory<\/code>\u8fd9\u4e2a\u7c7b\u5b9e\u73b0\u5b89\u5168socket\uff0c<code>SSLSocketFactory<\/code>\u5b9e\u73b0\u4e86SSL\/TLS\u5206\u5c42\u3002\u8bf7\u77e5\u6653\uff0cHttpClient\u6ca1\u6709\u81ea\u5b9a\u4e49\u4efb\u4f55\u52a0\u5bc6\u7b97\u6cd5\u3002\u5b83\u5b8c\u5168\u4f9d\u8d56\u4e8eJava\u52a0\u5bc6\u6807\u51c6\uff08JCE\uff09\u548c\u5b89\u5168\u5957\u63a5\u5b57\uff08JSEE\uff09\u62d3\u5c55\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.7.2. \u96c6\u6210\u8fde\u63a5\u7ba1\u7406\u5668<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u81ea\u5b9a\u4e49\u7684socket\u5de5\u5382\u7c7b\u53ef\u4ee5\u548c\u6307\u5b9a\u7684\u534f\u8bae\uff08Http\u3001Https\uff09\u8054\u7cfb\u8d77\u6765\uff0c\u7528\u6765\u521b\u5efa\u81ea\u5b9a\u4e49\u7684\u8fde\u63a5\u7ba1\u7406\u5668\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>ConnectionSocketFactory&nbsp;plainsf&nbsp;=&nbsp;&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>LayeredConnectionSocketFactory&nbsp;sslsf&nbsp;=&nbsp;&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>Registry&lt;ConnectionSocketFactory&gt;&nbsp;r&nbsp;=&nbsp;RegistryBuilder.&lt;ConnectionSocketFactory&gt;create()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.register(&#8220;http&#8221;,&nbsp;plainsf)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.register(&#8220;https&#8221;,&nbsp;sslsf)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><li>HttpClientConnectionManager&nbsp;cm&nbsp;=&nbsp;new&nbsp;PoolingHttpClientConnectionManager(r);&nbsp;&nbsp;<\/li><li>HttpClients.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setConnectionManager(cm)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">2.7.3. SSL\/TLS\u5b9a\u5236<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u4f7f\u7528<code>SSLSocketFactory<\/code>\u6765\u521b\u5efassl\u8fde\u63a5\u3002<code>SSLSocketFactory<\/code>\u5141\u8bb8\u7528\u6237\u9ad8\u5ea6\u5b9a\u5236\u3002\u5b83\u53ef\u4ee5\u63a5\u53d7<code>javax.net.ssl.SSLContext<\/code>\u8fd9\u4e2a\u7c7b\u7684\u5b9e\u4f8b\u4f5c\u4e3a\u53c2\u6570\uff0c\u6765\u521b\u5efa\u81ea\u5b9a\u4e49\u7684ssl\u8fde\u63a5\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>HttpClientContext&nbsp;clientContext&nbsp;=&nbsp;HttpClientContext.create();&nbsp;&nbsp;<\/li><li>KeyStore&nbsp;myTrustStore&nbsp;=&nbsp;&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>SSLContext&nbsp;sslContext&nbsp;=&nbsp;SSLContexts.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.useTLS()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.loadTrustMaterial(myTrustStore)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><li>SSLConnectionSocketFactory&nbsp;sslsf&nbsp;=&nbsp;new&nbsp;SSLConnectionSocketFactory(sslContext);&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">2.7.4. \u57df\u540d\u9a8c\u8bc1<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u9664\u4e86\u4fe1\u4efb\u9a8c\u8bc1\u548c\u5728ssl\/tls\u534f\u8bae\u5c42\u4e0a\u8fdb\u884c\u5ba2\u6237\u7aef\u8ba4\u8bc1\uff0cHttpClient\u4e00\u65e6\u5efa\u7acb\u8d77\u8fde\u63a5\uff0c\u5c31\u53ef\u4ee5\u9009\u62e9\u6027\u9a8c\u8bc1\u76ee\u6807\u57df\u540d\u548c\u5b58\u50a8\u5728X.509\u8bc1\u4e66\u4e2d\u7684\u57df\u540d\u662f\u5426\u4e00\u81f4\u3002\u8fd9\u79cd\u9a8c\u8bc1\u53ef\u4ee5\u4e3a\u670d\u52a1\u5668\u4fe1\u4efb\u63d0\u4f9b\u989d\u5916\u7684\u4fdd\u969c\u3002<code>X509HostnameVerifier<\/code>\u63a5\u53e3\u4ee3\u8868\u4e3b\u673a\u540d\u9a8c\u8bc1\u7684\u7b56\u7565\u3002\u5728HttpClient\u4e2d\uff0c<code>X509HostnameVerifier<\/code>\u6709\u4e09\u4e2a\u5b9e\u73b0\u7c7b\u3002\u91cd\u8981\u63d0\u793a\uff1a\u4e3b\u673a\u540d\u6709\u6548\u6027\u9a8c\u8bc1\u4e0d\u5e94\u8be5\u548cssl\u4fe1\u4efb\u9a8c\u8bc1\u6df7\u4e3a\u4e00\u8c08\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><code>StrictHostnameVerifier<\/code>:&nbsp;\u4e25\u683c\u7684\u4e3b\u673a\u540d\u9a8c\u8bc1\u65b9\u6cd5\u548cjava 1.4,1.5,1.6\u9a8c\u8bc1\u65b9\u6cd5\u76f8\u540c\u3002\u548cIE6\u7684\u65b9\u5f0f\u4e5f\u5927\u81f4\u76f8\u540c\u3002\u8fd9\u79cd\u9a8c\u8bc1\u65b9\u5f0f\u7b26\u5408RFC 2818\u901a\u914d\u7b26\u3002The hostname must match either the first CN, or any of the subject-alts. A wildcard can occur in the CN, and in any of the subject-alts.<\/li><li><code>BrowserCompatHostnameVerifier<\/code>:&nbsp;\u8fd9\u79cd\u9a8c\u8bc1\u4e3b\u673a\u540d\u7684\u65b9\u6cd5\uff0c\u548cCurl\u53cafirefox\u4e00\u81f4\u3002The hostname must match either the first CN, or any of the subject-alts. A wildcard can occur in the CN, and in any of the subject-alts.<code>StrictHostnameVerifier<\/code>\u548c<code>BrowserCompatHostnameVerifier<\/code>\u65b9\u5f0f\u552f\u4e00\u4e0d\u540c\u7684\u5730\u65b9\u5c31\u662f\uff0c\u5e26\u6709\u901a\u914d\u7b26\u7684\u57df\u540d\uff08\u6bd4\u5982*.yeetrack.com),<code>BrowserCompatHostnameVerifier<\/code>\u65b9\u5f0f\u5728\u5339\u914d\u65f6\u4f1a\u5339\u914d\u6240\u6709\u7684\u7684\u5b50\u57df\u540d\uff0c\u5305\u62ec a.b.yeetrack.com .<\/li><li><code>AllowAllHostnameVerifier<\/code>:&nbsp;\u8fd9\u79cd\u65b9\u5f0f\u4e0d\u5bf9\u4e3b\u673a\u540d\u8fdb\u884c\u9a8c\u8bc1\uff0c\u9a8c\u8bc1\u529f\u80fd\u88ab\u5173\u95ed\uff0c\u662f\u4e2a\u7a7a\u64cd\u4f5c\uff0c\u6240\u4ee5\u5b83\u4e0d\u4f1a\u629b\u51fa<code>javax.net.ssl.SSLException<\/code>\u5f02\u5e38\u3002HttpClient\u9ed8\u8ba4\u4f7f\u7528<code>BrowserCompatHostnameVerifier<\/code>\u7684\u9a8c\u8bc1\u65b9\u5f0f\u3002\u5982\u679c\u9700\u8981\uff0c\u6211\u4eec\u53ef\u4ee5\u624b\u52a8\u6267\u884c\u9a8c\u8bc1\u65b9\u5f0f\u3002<ol><li>SSLContext&nbsp;sslContext&nbsp;=&nbsp;SSLContexts.createSystemDefault();&nbsp;&nbsp;<\/li><li>SSLConnectionSocketFactory&nbsp;sslsf&nbsp;=&nbsp;new&nbsp;SSLConnectionSocketFactory(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;sslContext,&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SSLConnectionSocketFactory.STRICT_HOSTNAME_VERIFIER);&nbsp;&nbsp;<\/li><\/ol><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">2.8. HttpClient\u4ee3\u7406\u670d\u52a1\u5668\u914d\u7f6e<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c3d\u7ba1\uff0cHttpClient\u652f\u6301\u590d\u6742\u7684\u8def\u7531\u65b9\u6848\u548c\u4ee3\u7406\u94fe\uff0c\u5b83\u540c\u6837\u4e5f\u652f\u6301\u76f4\u63a5\u8fde\u63a5\u6216\u8005\u53ea\u901a\u8fc7\u4e00\u8df3\u7684\u8fde\u63a5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528\u4ee3\u7406\u670d\u52a1\u5668\u6700\u7b80\u5355\u7684\u65b9\u5f0f\u5c31\u662f\uff0c\u6307\u5b9a\u4e00\u4e2a\u9ed8\u8ba4\u7684proxy\u53c2\u6570\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>HttpHost&nbsp;proxy&nbsp;=&nbsp;new&nbsp;HttpHost(&#8220;someproxy&#8221;,&nbsp;8080);&nbsp;&nbsp;<\/li><li>DefaultProxyRoutePlanner&nbsp;routePlanner&nbsp;=&nbsp;new&nbsp;DefaultProxyRoutePlanner(proxy);&nbsp;&nbsp;<\/li><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setRoutePlanner(routePlanner)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u4e5f\u53ef\u4ee5\u8ba9HttpClient\u53bb\u4f7f\u7528jre\u7684\u4ee3\u7406\u670d\u52a1\u5668\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>SystemDefaultRoutePlanner&nbsp;routePlanner&nbsp;=&nbsp;new&nbsp;SystemDefaultRoutePlanner(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ProxySelector.getDefault());&nbsp;&nbsp;<\/li><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setRoutePlanner(routePlanner)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u53c8\u6216\u8005\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u624b\u52a8\u914d\u7f6e<code>RoutePlanner<\/code>\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u5b8c\u5168\u63a7\u5236Http\u8def\u7531\u7684\u8fc7\u7a0b\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>HttpRoutePlanner&nbsp;routePlanner&nbsp;=&nbsp;new&nbsp;HttpRoutePlanner()&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;HttpRoute&nbsp;determineRoute(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HttpHost&nbsp;target,&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HttpRequest&nbsp;request,&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HttpContext&nbsp;context)&nbsp;throws&nbsp;HttpException&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;new&nbsp;HttpRoute(target,&nbsp;null,&nbsp;&nbsp;new&nbsp;HttpHost(&#8220;someproxy&#8221;,&nbsp;8080),&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&#8220;https&#8221;.equalsIgnoreCase(target.getSchemeName()));&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>};&nbsp;&nbsp;<\/li><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setRoutePlanner(routePlanner)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h1 class=\"wp-block-heading\">\u7b2c\u4e09\u7ae0 Http\u72b6\u6001\u7ba1\u7406<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u521d\uff0cHttp\u88ab\u8bbe\u8ba1\u6210\u4e00\u4e2a\u65e0\u72b6\u6001\u7684\uff0c\u9762\u5411\u8bf7\u6c42\/\u54cd\u5e94\u7684\u534f\u8bae\uff0c\u6240\u4ee5\u5b83\u4e0d\u80fd\u5728\u903b\u8f91\u76f8\u5173\u7684http\u8bf7\u6c42\/\u54cd\u5e94\u4e2d\u4fdd\u6301\u72b6\u6001\u4f1a\u8bdd\u3002\u7531\u4e8e\u8d8a\u6765\u8d8a\u591a\u7684\u7cfb\u7edf\u4f7f\u7528http\u534f\u8bae\uff0c\u5176\u4e2d\u5305\u62echttp\u4ece\u6765\u6ca1\u6709\u60f3\u652f\u6301\u7684\u7cfb\u7edf\uff0c\u6bd4\u5982\u7535\u5b50\u5546\u52a1\u7cfb\u7edf\u3002\u56e0\u6b64\uff0chttp\u652f\u6301\u72b6\u6001\u7ba1\u7406\u5c31\u5f88\u5fc5\u8981\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u65f6\u7684web\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u8f6f\u4ef6\u9886\u5148\u8005\uff0c\u7f51\u666f(netscape)\u516c\u53f8\uff0c\u6700\u5148\u5728\u4ed6\u4eec\u7684\u4ea7\u54c1\u4e2d\u652f\u6301http\u72b6\u6001\u7ba1\u7406\uff0c\u5e76\u4e14\u5236\u5b9a\u4e86\u4e00\u4e9b\u4e13\u6709\u89c4\u8303\u3002\u540e\u6765\uff0c\u7f51\u666f\u901a\u8fc7\u53d1\u89c4\u8303\u8349\u6848\uff0c\u89c4\u8303\u4e86\u8fd9\u4e00\u673a\u5236\u3002\u8fd9\u4e9b\u52aa\u529b\u4fc3\u6210 RFC standard track\u5236\u5b9a\u4e86\u6807\u51c6\u7684\u89c4\u8303\u3002\u4f46\u662f\uff0c\u73b0\u5728\u591a\u6570\u7684\u5e94\u7528\u7684\u72b6\u6001\u7ba1\u7406\u673a\u5236\u90fd\u5728\u4f7f\u7528\u7f51\u666f\u516c\u53f8\u7684\u89c4\u8303\uff0c\u800c\u7f51\u666f\u7684\u89c4\u8303\u548c\u5b98\u65b9\u89c4\u5b9a\u662f\u4e0d\u517c\u5bb9\u7684\u3002\u56e0\u6b64\u6240\u6709\u7684\u6d4f\u89c8\u5668\u5f00\u53d1\u8fd9\u90fd\u88ab\u8feb\u517c\u5bb9\u8fd9\u4e24\u79cd\u534f\u8bae\uff0c\u4ece\u800c\u5bfc\u81f4\u534f\u8bae\u7684\u4e0d\u7edf\u4e00\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3.1. Http cookies<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u8c13\u7684Http cookie\u5c31\u662f\u4e00\u4e2atoken\u6216\u8005\u5f88\u77ed\u7684\u62a5\u6587\u4fe1\u606f\uff0chttp\u4ee3\u7406\u548c\u670d\u52a1\u5668\u53ef\u4ee5\u901a\u8fc7cookie\u6765\u7ef4\u6301\u4f1a\u8bdd\u72b6\u6001\u3002\u7f51\u666f\u7684\u5de5\u7a0b\u5e08\u628a\u5b83\u4eec\u79f0\u4f5c\u201cmagic cookie\u201d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u4f7f\u7528<code>Cookie<\/code>\u63a5\u53e3\u6765\u4ee3\u8868cookie\u3002\u7b80\u5355\u8bf4\u6765\uff0ccookie\u5c31\u662f\u4e00\u4e2a\u952e\u503c\u5bf9\u3002\u4e00\u822c\uff0ccookie\u4e5f\u4f1a\u5305\u542b\u7248\u672c\u53f7\u3001\u57df\u540d\u3001\u8def\u5f84\u548ccookie\u6709\u6548\u671f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>SetCookie<\/code>\u63a5\u53e3\u53ef\u4ee5\u4ee3\u8868\u670d\u52a1\u5668\u53d1\u7ed9http\u4ee3\u7406\u7684\u4e00\u4e2aset-cookie\u54cd\u5e94\u5934\uff0c\u5728\u6d4f\u89c8\u5668\u4e2d\uff0c\u8fd9\u4e2aset-cookie\u54cd\u5e94\u5934\u53ef\u4ee5\u5199\u5165cookie\uff0c\u4ee5\u4fbf\u4fdd\u6301\u4f1a\u8bdd\u72b6\u6001\u3002<code>SetCookie2<\/code>\u63a5\u53e3\u5bf9<code>SetCookie<\/code>\u63a5\u53e3\u8fdb\u884c\u4e86\u62d3\u5c55\uff0c\u6dfb\u52a0\u4e86<code>Set-Cookie2<\/code>\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>ClientCookie<\/code>\u63a5\u53e3\u7ee7\u627f\u4e86<code>Cookie<\/code>\u63a5\u53e3\uff0c\u5e76\u8fdb\u884c\u4e86\u529f\u80fd\u62d3\u5c55\uff0c\u6bd4\u5982\u5b83\u53ef\u4ee5\u53d6\u51fa\u670d\u52a1\u5668\u53d1\u9001\u8fc7\u6765\u7684\u539f\u59cbcookie\u7684\u503c\u3002\u751f\u6210\u5934\u6d88\u606f\u662f\u5f88\u91cd\u8981\u7684\uff0c\u56e0\u4e3a\u53ea\u6709\u5f53cookie\u88ab\u6307\u5b9a\u4e3a<code>Set-Cookie<\/code>\u6216\u8005<code>Set-Cookie2<\/code>\u65f6\uff0c\u5b83\u624d\u9700\u8981\u5305\u62ec\u4e00\u4e9b\u7279\u5b9a\u7684\u5c5e\u6027\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.1.1 COOKIES\u7248\u672c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u517c\u5bb9\u7f51\u666f\u7684\u89c4\u8303\uff0c\u4f46\u662f\u4e0d\u517c\u5bb9\u5b98\u65b9\u89c4\u8303\u7684cookie\uff0c\u662f\u7248\u672c0. \u517c\u5bb9\u5b98\u65b9\u89c4\u8303\u7684\u7248\u672c\uff0c\u5c06\u4f1a\u662f\u7248\u672c1\u3002\u7248\u672c1\u4e2d\u7684Cookie\u53ef\u80fd\u548c\u7248\u672c0\u5de5\u4f5c\u673a\u5236\u6709\u5dee\u5f02\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u7684\u4ee3\u7801\uff0c\u521b\u5efa\u4e86\u7f51\u666f\u7248\u672c\u7684Cookie\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>BasicClientCookie&nbsp;netscapeCookie&nbsp;=&nbsp;new&nbsp;BasicClientCookie(&#8220;name&#8221;,&nbsp;&#8220;value&#8221;);&nbsp;&nbsp;<\/li><li>netscapeCookie.setVersion(0);&nbsp;&nbsp;<\/li><li>netscapeCookie.setDomain(&#8220;.mycompany.com&#8221;);&nbsp;&nbsp;<\/li><li>netscapeCookie.setPath(&#8220;\/&#8221;);&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u7684\u4ee3\u7801\uff0c\u521b\u5efa\u6807\u51c6\u7248\u672c\u7684Cookie\u3002\u6ce8\u610f\uff0c\u6807\u51c6\u7248\u672c\u7684Cookie\u5fc5\u987b\u4fdd\u7559\u670d\u52a1\u5668\u53d1\u9001\u8fc7\u6765\u7684Cookie\u6240\u6709\u5c5e\u6027\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>BasicClientCookie&nbsp;stdCookie&nbsp;=&nbsp;new&nbsp;BasicClientCookie(&#8220;name&#8221;,&nbsp;&#8220;value&#8221;);&nbsp;&nbsp;<\/li><li>stdCookie.setVersion(1);&nbsp;&nbsp;<\/li><li>stdCookie.setDomain(&#8220;.mycompany.com&#8221;);&nbsp;&nbsp;<\/li><li>stdCookie.setPath(&#8220;\/&#8221;);&nbsp;&nbsp;<\/li><li>stdCookie.setSecure(true);&nbsp;&nbsp;<\/li><li>\/\/&nbsp;Set&nbsp;attributes&nbsp;EXACTLY&nbsp;as&nbsp;sent&nbsp;by&nbsp;the&nbsp;server&nbsp;&nbsp;&nbsp;<\/li><li>stdCookie.setAttribute(ClientCookie.VERSION_ATTR,&nbsp;&#8220;1&#8221;);&nbsp;&nbsp;<\/li><li>stdCookie.setAttribute(ClientCookie.DOMAIN_ATTR,&nbsp;&#8220;.mycompany.com&#8221;);&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u7684\u4ee3\u7801\uff0c\u521b\u5efa\u4e86<code>Set-Cookie2<\/code>\u517c\u5bb9cookie\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>BasicClientCookie2&nbsp;stdCookie&nbsp;=&nbsp;new&nbsp;BasicClientCookie2(&#8220;name&#8221;,&nbsp;&#8220;value&#8221;);&nbsp;&nbsp;<\/li><li>stdCookie.setVersion(1);&nbsp;&nbsp;<\/li><li>stdCookie.setDomain(&#8220;.mycompany.com&#8221;);&nbsp;&nbsp;<\/li><li>stdCookie.setPorts(new&nbsp;int[]&nbsp;{80,8080});&nbsp;&nbsp;<\/li><li>stdCookie.setPath(&#8220;\/&#8221;);&nbsp;&nbsp;<\/li><li>stdCookie.setSecure(true);&nbsp;&nbsp;<\/li><li>\/\/&nbsp;Set&nbsp;attributes&nbsp;EXACTLY&nbsp;as&nbsp;sent&nbsp;by&nbsp;the&nbsp;server&nbsp;&nbsp;&nbsp;<\/li><li>stdCookie.setAttribute(ClientCookie.VERSION_ATTR,&nbsp;&#8220;1&#8221;);&nbsp;&nbsp;<\/li><li>stdCookie.setAttribute(ClientCookie.DOMAIN_ATTR,&nbsp;&#8220;.mycompany.com&#8221;);&nbsp;&nbsp;<\/li><li>stdCookie.setAttribute(ClientCookie.PORT_ATTR,&nbsp;&#8220;80,8080&#8221;);&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">3.2. Cookie\u89c4\u8303<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><code>CookieSpec<\/code>\u63a5\u53e3\u4ee3\u8868\u4e86Cookie\u7ba1\u7406\u89c4\u8303\u3002Cookie\u7ba1\u7406\u89c4\u8303\u89c4\u5b9a\u4e86\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u89e3\u6790<code>Set-Cookie<\/code>\u548c<code>Set-Cookie2<\/code>(\u53ef\u9009\uff09\u5934\u6d88\u606f\u7684\u89c4\u5219<\/li><li>\u9a8c\u8bc1Cookie\u7684\u89c4\u5219<\/li><li>\u5c06\u6307\u5b9a\u7684\u4e3b\u673a\u540d\u3001\u7aef\u53e3\u548c\u8def\u5f84\u683c\u5f0f\u5316\u6210Cookie\u5934\u6d88\u606f<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u6709\u4e0b\u9762\u51e0\u79cd<code>CookieSpec<\/code>\u89c4\u8303\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Netscape draft:&nbsp;\u8fd9\u79cd\u7b26\u5408\u7f51\u666f\u516c\u53f8\u6307\u5b9a\u7684\u89c4\u8303\u3002\u4f46\u662f\u5c3d\u91cf\u4e0d\u8981\u4f7f\u7528\uff0c\u9664\u975e\u4e00\u5b9a\u8981\u4fdd\u8bc1\u517c\u5bb9\u5f88\u65e7\u7684\u4ee3\u7801\u3002<\/li><li>Standard:&nbsp;RFC 2965 HTTP\u72b6\u6001\u7ba1\u7406\u89c4\u8303<\/li><li>Browser compatibility:&nbsp;\u8fd9\u79cd\u65b9\u5f0f\uff0c\u5c3d\u91cf\u6a21\u4eff\u5e38\u7528\u7684\u6d4f\u89c8\u5668\uff0c\u5982IE\u548cfirefox<\/li><li>Best match:&nbsp;\u2018Meta\u2019 cookie specification that picks up a cookie policy based on the format of cookies sent with the HTTP response.\u5b83\u57fa\u672c\u4e0a\u5c06\u4e0a\u9762\u7684\u51e0\u79cd\u89c4\u8303\u79ef\u805a\u5230\u4e00\u4e2a\u7c7b\u4e2d\u3002<br>++&nbsp;Ignore cookies:&nbsp;\u5ffd\u7565\u6240\u6709Cookie<br>\u5f3a\u70c8\u63a8\u8350\u4f7f\u7528Best Match\u5339\u914d\u89c4\u5219\uff0c\u8ba9HttpClient\u6839\u636e\u8fd0\u884c\u65f6\u73af\u5883\u81ea\u5df1\u9009\u62e9\u5408\u9002\u7684\u89c4\u8303\u3002<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">3.3. \u9009\u62e9Cookie\u7b56\u7565<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u53ef\u4ee5\u5728\u521b\u5efaHttp client\u7684\u65f6\u5019\u6307\u5b9aCookie\u6d4b\u8bd5\uff0c\u5982\u679c\u9700\u8981\uff0c\u4e5f\u53ef\u4ee5\u5728\u6267\u884chttp\u8bf7\u6c42\u7684\u65f6\u5019\uff0c\u8fdb\u884c\u8986\u76d6\u6307\u5b9a\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>RequestConfig&nbsp;globalConfig&nbsp;=&nbsp;RequestConfig.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setCookieSpec(CookieSpecs.BEST_MATCH)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setDefaultRequestConfig(globalConfig)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><li>RequestConfig&nbsp;localConfig&nbsp;=&nbsp;RequestConfig.copy(globalConfig)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setCookieSpec(CookieSpecs.BROWSER_COMPATIBILITY)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpGet&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;\/&#8221;);&nbsp;&nbsp;<\/li><li>httpGet.setConfig(localConfig);&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">3.4. \u81ea\u5b9a\u4e49Cookie\u7b56\u7565<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u6211\u4eec\u8981\u81ea\u5b9a\u4e49Cookie\u6d4b\u8bd5\uff0c\u5c31\u8981\u81ea\u5df1\u5b9e\u73b0<code>CookieSpec<\/code>\u63a5\u53e3\uff0c\u7136\u540e\u521b\u5efa\u4e00\u4e2a<code>CookieSpecProvider<\/code>\u63a5\u53e3\u6765\u65b0\u5efa\u3001\u521d\u59cb\u5316\u81ea\u5b9a\u4e49<code>CookieSpec<\/code>\u63a5\u53e3\uff0c\u6700\u540e\u628a<code>CookieSpecProvider<\/code>\u6ce8\u518c\u5230HttpClient\u4e2d\u3002\u4e00\u65e6\u6211\u4eec\u6ce8\u518c\u4e86\u81ea\u5b9a\u4e49\u7b56\u7565\uff0c\u5c31\u53ef\u4ee5\u50cf\u5176\u4ed6\u6807\u51c6\u7b56\u7565\u4e00\u6837\u4f7f\u7528\u4e86\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CookieSpecProvider&nbsp;easySpecProvider&nbsp;=&nbsp;new&nbsp;CookieSpecProvider()&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;CookieSpec&nbsp;create(HttpContext&nbsp;context)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;new&nbsp;BrowserCompatSpec()&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href=\"https:\/\/my.oschina.net\/u\/1162528\">@Override<\/a>&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;void&nbsp;validate(Cookie&nbsp;cookie,&nbsp;CookieOrigin&nbsp;origin)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;throws&nbsp;MalformedCookieException&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;Oh,&nbsp;I&nbsp;am&nbsp;easy&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;};&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>};&nbsp;&nbsp;<\/li><li>Registry&lt;CookieSpecProvider&gt;&nbsp;r&nbsp;=&nbsp;RegistryBuilder.&lt;CookieSpecProvider&gt;create()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.register(CookieSpecs.BEST_MATCH,&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;BestMatchSpecFactory())&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.register(CookieSpecs.BROWSER_COMPATIBILITY,&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;BrowserCompatSpecFactory())&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.register(&#8220;easy&#8221;,&nbsp;easySpecProvider)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><li>RequestConfig&nbsp;requestConfig&nbsp;=&nbsp;RequestConfig.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setCookieSpec(&#8220;easy&#8221;)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setDefaultCookieSpecRegistry(r)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setDefaultRequestConfig(requestConfig)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">3.5. Cookie\u6301\u4e45\u5316<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u53ef\u4ee5\u4f7f\u7528\u4efb\u4f55\u5b58\u50a8\u65b9\u5f0f\u7684cookie store\uff0c\u53ea\u8981\u8fd9\u4e2acookie store\u5b9e\u73b0\u4e86<code>CookieStore<\/code>\u63a5\u53e3\u3002\u9ed8\u8ba4\u7684CookieStore\u901a\u8fc7<code>java.util.ArrayList<\/code>\u7b80\u5355\u5b9e\u73b0\u4e86<code>BasicCookieStore<\/code>\u3002\u5b58\u5728\u5728<code>BasicCookieStore<\/code>\u4e2d\u7684Cookie\uff0c\u5f53\u8f7d\u4f53\u5bf9\u8c61\u88ab\u5f53\u505a\u5783\u573e\u56de\u6536\u6389\u540e\uff0c\u5c31\u4f1a\u4e22\u5931\u3002\u5982\u679c\u5fc5\u8981\uff0c\u7528\u6237\u53ef\u4ee5\u81ea\u5df1\u5b9e\u73b0\u66f4\u4e3a\u590d\u6742\u7684\u65b9\u5f0f\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>\/\/&nbsp;Create&nbsp;a&nbsp;local&nbsp;instance&nbsp;of&nbsp;cookie&nbsp;store&nbsp;&nbsp;<\/li><li>CookieStore&nbsp;cookieStore&nbsp;=&nbsp;new&nbsp;BasicCookieStore();&nbsp;&nbsp;<\/li><li>\/\/&nbsp;Populate&nbsp;cookies&nbsp;if&nbsp;needed&nbsp;&nbsp;<\/li><li>BasicClientCookie&nbsp;cookie&nbsp;=&nbsp;new&nbsp;BasicClientCookie(&#8220;name&#8221;,&nbsp;&#8220;value&#8221;);&nbsp;&nbsp;<\/li><li>cookie.setVersion(0);&nbsp;&nbsp;<\/li><li>cookie.setDomain(&#8220;.mycompany.com&#8221;);&nbsp;&nbsp;<\/li><li>cookie.setPath(&#8220;\/&#8221;);&nbsp;&nbsp;<\/li><li>cookieStore.addCookie(cookie);&nbsp;&nbsp;<\/li><li>\/\/&nbsp;Set&nbsp;the&nbsp;store&nbsp;&nbsp;<\/li><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setDefaultCookieStore(cookieStore)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">3.6.HTTP\u72b6\u6001\u7ba1\u7406\u548c\u6267\u884c\u4e0a\u4e0b\u6587<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728Http\u8bf7\u6c42\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0cHttpClient\u4f1a\u81ea\u52a8\u5411\u6267\u884c\u4e0a\u4e0b\u6587\u4e2d\u6dfb\u52a0\u4e0b\u9762\u7684\u72b6\u6001\u7ba1\u7406\u5bf9\u8c61\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><code>Lookup<\/code>\u5bf9\u8c61 \u4ee3\u8868\u5b9e\u9645\u7684cookie\u89c4\u8303registry\u3002\u5728\u5f53\u524d\u4e0a\u4e0b\u6587\u4e2d\u7684\u8fd9\u4e2a\u503c\u4f18\u5148\u4e8e\u9ed8\u8ba4\u503c\u3002<\/li><li><code>CookieSpec<\/code>\u5bf9\u8c61 \u4ee3\u8868\u5b9e\u9645\u7684Cookie\u89c4\u8303\u3002<\/li><li><code>CookieOrigin<\/code>\u5bf9\u8c61 \u4ee3\u8868\u5b9e\u9645\u7684origin server\u7684\u8be6\u7ec6\u4fe1\u606f\u3002<\/li><li><code>CookieStore<\/code>\u5bf9\u8c61 \u8868\u793aCookie store\u3002\u8fd9\u4e2a\u5c5e\u6027\u96c6\u4e2d\u7684\u503c\u4f1a\u53d6\u4ee3\u9ed8\u8ba4\u503c\u3002<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u5730\u7684<code>HttpContext<\/code>\u5bf9\u8c61\u53ef\u4ee5\u7528\u6765\u5728Http\u8bf7\u6c42\u6267\u884c\u524d\uff0c\u81ea\u5b9a\u4e49Http\u72b6\u6001\u7ba1\u7406\u4e0a\u4e0b\u6587;\u6216\u8005\u6d4b\u8bd5http\u8bf7\u6c42\u6267\u884c\u5b8c\u6bd5\u540e\u4e0a\u4e0b\u6587\u7684\u72b6\u6001\u3002\u6211\u4eec\u4e5f\u53ef\u4ee5\u5728\u4e0d\u540c\u7684\u7ebf\u7a0b\u4e2d\u4f7f\u7528\u4e0d\u540c\u7684\u6267\u884c\u4e0a\u4e0b\u6587\u3002\u6211\u4eec\u5728http\u8bf7\u6c42\u5c42\u6307\u5b9a\u7684cookie\u89c4\u8303\u96c6\u548ccookie store\u4f1a\u8986\u76d6\u5728http Client\u5c42\u7ea7\u7684\u9ed8\u8ba4\u503c\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>Lookup&lt;CookieSpecProvider&gt;&nbsp;cookieSpecReg&nbsp;=&nbsp;&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>CookieStore&nbsp;cookieStore&nbsp;=&nbsp;&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>HttpClientContext&nbsp;context&nbsp;=&nbsp;HttpClientContext.create();&nbsp;&nbsp;<\/li><li>context.setCookieSpecRegistry(cookieSpecReg);&nbsp;&nbsp;<\/li><li>context.setCookieStore(cookieStore);&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;http:\/\/somehost\/&#8221;);&nbsp;&nbsp;<\/li><li>CloseableHttpResponse&nbsp;response1&nbsp;=&nbsp;httpclient.execute(httpget,&nbsp;context);&nbsp;&nbsp;<\/li><li>&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>\/\/&nbsp;Cookie&nbsp;origin&nbsp;details&nbsp;&nbsp;<\/li><li>CookieOrigin&nbsp;cookieOrigin&nbsp;=&nbsp;context.getCookieOrigin();&nbsp;&nbsp;<\/li><li>\/\/&nbsp;Cookie&nbsp;spec&nbsp;used&nbsp;&nbsp;<\/li><li>CookieSpec&nbsp;cookieSpec&nbsp;=&nbsp;context.getCookieSpec();&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h1 class=\"wp-block-heading\">\u7b2c\u56db\u7ae0 HTTP\u8ba4\u8bc1<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u65e2\u652f\u6301HTTP\u6807\u51c6\u89c4\u8303\u5b9a\u4e49\u7684\u8ba4\u8bc1\u6a21\u5f0f\uff0c\u53c8\u652f\u6301\u4e00\u4e9b\u5e7f\u6cdb\u4f7f\u7528\u7684\u975e\u6807\u51c6\u8ba4\u8bc1\u6a21\u5f0f\uff0c\u6bd4\u5982NTLM\u548cSPNEGO\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4.1.\u7528\u6237\u51ed\u8bc1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4efb\u4f55\u7528\u6237\u8ba4\u8bc1\u7684\u8fc7\u7a0b\uff0c\u90fd\u9700\u8981\u4e00\u7cfb\u5217\u7684\u51ed\u8bc1\u6765\u786e\u5b9a\u7528\u6237\u7684\u8eab\u4efd\u3002\u6700\u7b80\u5355\u7684\u7528\u6237\u51ed\u8bc1\u53ef\u4ee5\u662f\u7528\u6237\u540d\u548c\u5bc6\u7801\u8fd9\u79cd\u5f62\u5f0f\u3002<code>UsernamePasswordCredentials<\/code>\u8fd9\u4e2a\u7c7b\u53ef\u4ee5\u7528\u6765\u8868\u793a\u8fd9\u79cd\u60c5\u51b5\uff0c\u8fd9\u79cd\u51ed\u636e\u5305\u542b\u660e\u6587\u7684\u7528\u6237\u540d\u548c\u5bc6\u7801\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u7c7b\u5bf9\u4e8eHTTP\u6807\u51c6\u89c4\u8303\u4e2d\u5b9a\u4e49\u7684\u8ba4\u8bc1\u6a21\u5f0f\u6765\u8bf4\u5df2\u7ecf\u8db3\u591f\u4e86\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>UsernamePasswordCredentials&nbsp;creds&nbsp;=&nbsp;new&nbsp;UsernamePasswordCredentials(&#8220;user&#8221;,&nbsp;&#8220;pwd&#8221;);&nbsp;&nbsp;<\/li><li>System.out.println(creds.getUserPrincipal().getName());&nbsp;&nbsp;<\/li><li>System.out.println(creds.getPassword());&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8ff0\u4ee3\u7801\u4f1a\u5728\u63a7\u5236\u53f0\u8f93\u51fa\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>user&nbsp;&nbsp;<\/li><li>pwd&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><code>NTCredentials<\/code>\u662f\u5fae\u8f6f\u7684windows\u7cfb\u7edf\u4f7f\u7528\u7684\u4e00\u79cd\u51ed\u636e\uff0c\u5305\u542busername\u3001password\uff0c\u8fd8\u5305\u62ec\u4e00\u7cfb\u5217\u5176\u4ed6\u7684\u5c5e\u6027\uff0c\u6bd4\u5982\u7528\u6237\u6240\u5728\u7684\u57df\u540d\u3002\u5728Microsoft Windows\u7684\u7f51\u7edc\u73af\u5883\u4e2d\uff0c\u540c\u4e00\u4e2a\u7528\u6237\u53ef\u4ee5\u5c5e\u4e8e\u4e0d\u540c\u7684\u57df\uff0c\u6240\u4ee5\u4ed6\u4e5f\u5c31\u6709\u4e0d\u540c\u7684\u51ed\u636e\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>NTCredentials&nbsp;creds&nbsp;=&nbsp;new&nbsp;NTCredentials(&#8220;user&#8221;,&nbsp;&#8220;pwd&#8221;,&nbsp;&#8220;workstation&#8221;,&nbsp;&#8220;domain&#8221;);&nbsp;&nbsp;<\/li><li>System.out.println(creds.getUserPrincipal().getName());&nbsp;&nbsp;<\/li><li>System.out.println(creds.getPassword());&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8ff0\u4ee3\u7801\u8f93\u51fa\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>DOMAIN\/user&nbsp;&nbsp;<\/li><li>pwd&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">4.2. \u8ba4\u8bc1\u65b9\u6848<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><code>AutoScheme<\/code>\u63a5\u53e3\u8868\u793a\u4e00\u4e2a\u62bd\u8c61\u7684\u9762\u5411\u6311\u6218\/\u54cd\u5e94\u7684\u8ba4\u8bc1\u65b9\u6848\u3002\u4e00\u4e2a\u8ba4\u8bc1\u65b9\u6848\u8981\u652f\u6301\u4e0b\u9762\u7684\u529f\u80fd\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5ba2\u6237\u7aef\u8bf7\u6c42\u670d\u52a1\u5668\u53d7\u4fdd\u62a4\u7684\u8d44\u6e90\uff0c\u670d\u52a1\u5668\u4f1a\u53d1\u9001\u8fc7\u6765\u4e00\u4e2achanllenge(\u6311\u6218\uff09\uff0c\u8ba4\u8bc1\u65b9\u6848\uff08Authentication scheme\uff09\u9700\u8981\u89e3\u6790\u3001\u5904\u7406\u8fd9\u4e2a\u6311\u6218<\/li><li>\u4e3aprocessed challenge\u63d0\u4f9b\u4e00\u4e9b\u5c5e\u6027\u503c\uff1a\u8ba4\u8bc1\u65b9\u6848\u7684\u7c7b\u578b\uff0c\u548c\u6b64\u65b9\u6848\u9700\u8981\u7684\u4e00\u4e9b\u53c2\u6570\uff0c\u8fd9\u79cd\u65b9\u6848\u9002\u7528\u7684\u8303\u56f4<\/li><li>\u4f7f\u7528\u7ed9\u5b9a\u7684\u6388\u6743\u4fe1\u606f\u751f\u6210\u6388\u6743\u5b57\u7b26\u4e32;\u751f\u6210http\u8bf7\u6c42\uff0c\u7528\u6765\u54cd\u5e94\u670d\u52a1\u5668\u53d1\u9001\u6765\u8fc7\u7684\u6388\u6743challenge<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bf7\u6ce8\u610f\uff1a\u4e00\u4e2a\u8ba4\u8bc1\u65b9\u6848\u53ef\u80fd\u662f\u6709\u72b6\u6001\u7684\uff0c\u56e0\u4e3a\u5b83\u53ef\u80fd\u6d89\u53ca\u5230\u4e00\u7cfb\u5217\u7684\u6311\u6218\/\u54cd\u5e94\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u5b9e\u73b0\u4e86\u4e0b\u9762\u51e0\u79cd<code>AutoScheme<\/code>:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Basic:&nbsp;Basic\u8ba4\u8bc1\u65b9\u6848\u662f\u5728RFC2617\u53f7\u6587\u6863\u4e2d\u5b9a\u4e49\u7684\u3002\u8fd9\u79cd\u6388\u6743\u65b9\u6848\u7528\u660e\u6587\u6765\u4f20\u8f93\u51ed\u8bc1\u4fe1\u606f\uff0c\u6240\u4ee5\u5b83\u662f\u4e0d\u5b89\u5168\u7684\u3002\u867d\u7136Basic\u8ba4\u8bc1\u65b9\u6848\u672c\u8eab\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4f46\u662f\u5b83\u4e00\u65e6\u548cTLS\/SSL\u52a0\u5bc6\u6280\u672f\u7ed3\u5408\u8d77\u6765\u4f7f\u7528\uff0c\u5c31\u5b8c\u5168\u8db3\u591f\u4e86\u3002<\/li><li>Digest:&nbsp;Digest\uff08\u6458\u8981\uff09\u8ba4\u8bc1\u65b9\u6848\u662f\u5728RFC2617\u53f7\u6587\u6863\u4e2d\u5b9a\u4e49\u7684\u3002Digest\u8ba4\u8bc1\u65b9\u6848\u6bd4Basic\u65b9\u6848\u5b89\u5168\u591a\u4e86\uff0c\u5bf9\u4e8e\u90a3\u4e9b\u53d7\u4e0d\u4e86Basic+TLS\/SSL\u4f20\u8f93\u5f00\u9500\u7684\u7cfb\u7edf\uff0cdigest\u65b9\u6848\u662f\u4e2a\u4e0d\u9519\u7684\u9009\u62e9\u3002<\/li><li>NTLM:&nbsp;NTLM\u8ba4\u8bc1\u65b9\u6848\u662f\u4e2a\u4e13\u6709\u7684\u8ba4\u8bc1\u65b9\u6848\uff0c\u7531\u5fae\u8f6f\u5f00\u53d1\uff0c\u5e76\u4e14\u9488\u5bf9windows\u5e73\u53f0\u505a\u4e86\u4f18\u5316\u3002NTLM\u88ab\u8ba4\u4e3a\u6bd4Digest\u66f4\u5b89\u5168\u3002<\/li><li>SPNEGO:&nbsp;SPNEGO(Simple and Protected GSSAPI Negotiation Mechanism)\u662fGSSAPI\u7684\u4e00\u4e2a\u201c\u4f2a\u673a\u5236\u201d\uff0c\u5b83\u7528\u6765\u534f\u5546\u771f\u6b63\u7684\u8ba4\u8bc1\u673a\u5236\u3002SPNEGO\u6700\u660e\u663e\u7684\u7528\u9014\u662f\u5728\u5fae\u8f6f\u7684HTTP\u534f\u5546\u8ba4\u8bc1\u673a\u5236\u62d3\u5c55\u4e0a\u3002\u53ef\u534f\u5546\u7684\u5b50\u673a\u5236\u5305\u62ecNTLM\u3001Kerberos\u3002\u76ee\u524d\uff0cHttpCLient\u53ea\u652f\u6301Kerberos\u673a\u5236\u3002\uff08\u539f\u6587\uff1aThe negotiable sub-mechanisms include NTLM and Kerberos supported by Active Directory. At present HttpClient only supports the Kerberos sub-mechanism.\uff09<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">4.3. \u51ed\u8bc1 provider<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u51ed\u8bc1providers\u65e8\u5728\u7ef4\u62a4\u4e00\u5957\u7528\u6237\u7684\u51ed\u8bc1\uff0c\u5f53\u9700\u8981\u67d0\u79cd\u7279\u5b9a\u7684\u51ed\u8bc1\u65f6\uff0cproviders\u5c31\u5e94\u8be5\u80fd\u4ea7\u751f\u8fd9\u79cd\u51ed\u8bc1\u3002\u8ba4\u8bc1\u7684\u5177\u4f53\u5185\u5bb9\u5305\u62ec\u4e3b\u673a\u540d\u3001\u7aef\u53e3\u53f7\u3001realm name\u548c\u8ba4\u8bc1\u65b9\u6848\u540d\u3002\u5f53\u4f7f\u7528\u51ed\u636eprovider\u7684\u65f6\u5019\uff0c\u6211\u4eec\u53ef\u4ee5\u5f88\u6a21\u7cca\u7684\u6307\u5b9a\u4e3b\u673a\u540d\u3001\u7aef\u53e3\u53f7\u3001realm\u548c\u8ba4\u8bc1\u65b9\u6848\uff0c\u4e0d\u7528\u5199\u7684\u5f88\u7cbe\u786e\u3002\u56e0\u4e3a\uff0c\u51ed\u636eprovider\u4f1a\u6839\u636e\u6211\u4eec\u6307\u5b9a\u7684\u5185\u5bb9\uff0c\u7b5b\u9009\u51fa\u4e00\u4e2a\u6700\u5339\u914d\u7684\u65b9\u6848\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ea\u8981\u6211\u4eec\u81ea\u5b9a\u4e49\u7684\u51ed\u636eprovider\u5b9e\u73b0\u4e86<code>CredentialsProvider<\/code>\u8fd9\u4e2a\u63a5\u53e3\uff0c\u5c31\u53ef\u4ee5\u5728HttpClient\u4e2d\u4f7f\u7528\u3002\u9ed8\u8ba4\u7684\u51ed\u636eprovider\u53eb\u505a<code>BasicCredentialsProvider<\/code>\uff0c\u5b83\u4f7f\u7528<code>java.util.HashMap<\/code>\u5bf9<code>CredentialsProvider<\/code>\u8fdb\u884c\u4e86\u7b80\u5355\u7684\u5b9e\u73b0\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CredentialsProvider&nbsp;credsProvider&nbsp;=&nbsp;new&nbsp;BasicCredentialsProvider();&nbsp;&nbsp;<\/li><li>credsProvider.setCredentials(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;AuthScope(&#8220;somehost&#8221;,&nbsp;AuthScope.ANY_PORT),&nbsp;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;UsernamePasswordCredentials(&#8220;u1&#8221;,&nbsp;&#8220;p1&#8221;));&nbsp;&nbsp;<\/li><li>credsProvider.setCredentials(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;AuthScope(&#8220;somehost&#8221;,&nbsp;8080),&nbsp;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;UsernamePasswordCredentials(&#8220;u2&#8221;,&nbsp;&#8220;p2&#8221;));&nbsp;&nbsp;<\/li><li>credsProvider.setCredentials(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;AuthScope(&#8220;otherhost&#8221;,&nbsp;8080,&nbsp;AuthScope.ANY_REALM,&nbsp;&#8220;ntlm&#8221;),&nbsp;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;UsernamePasswordCredentials(&#8220;u3&#8221;,&nbsp;&#8220;p3&#8221;));&nbsp;&nbsp;<\/li><li>System.out.println(credsProvider.getCredentials(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;AuthScope(&#8220;somehost&#8221;,&nbsp;80,&nbsp;&#8220;realm&#8221;,&nbsp;&#8220;basic&#8221;)));&nbsp;&nbsp;<\/li><li>System.out.println(credsProvider.getCredentials(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;AuthScope(&#8220;somehost&#8221;,&nbsp;8080,&nbsp;&#8220;realm&#8221;,&nbsp;&#8220;basic&#8221;)));&nbsp;&nbsp;<\/li><li>System.out.println(credsProvider.getCredentials(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;AuthScope(&#8220;otherhost&#8221;,&nbsp;8080,&nbsp;&#8220;realm&#8221;,&nbsp;&#8220;basic&#8221;)));&nbsp;&nbsp;<\/li><li>System.out.println(credsProvider.getCredentials(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;AuthScope(&#8220;otherhost&#8221;,&nbsp;8080,&nbsp;null,&nbsp;&#8220;ntlm&#8221;)));&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u9762\u4ee3\u7801\u8f93\u51fa\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>[principal:&nbsp;u1]&nbsp;&nbsp;<\/li><li>[principal:&nbsp;u2]&nbsp;&nbsp;<\/li><li>null&nbsp;&nbsp;<\/li><li>[principal:&nbsp;u3]&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">4.4.HTTP\u6388\u6743\u548c\u6267\u884c\u4e0a\u4e0b\u6587<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u4f9d\u8d56<code>AuthState<\/code>\u7c7b\u53bb\u8ddf\u8e2a\u8ba4\u8bc1\u8fc7\u7a0b\u4e2d\u7684\u72b6\u6001\u7684\u8be6\u7ec6\u4fe1\u606f\u3002\u5728Http\u8bf7\u6c42\u8fc7\u7a0b\u4e2d\uff0cHttpClient\u521b\u5efa\u4e24\u4e2a<code>AuthState<\/code>\u5b9e\u4f8b\uff1a\u4e00\u4e2a\u7528\u4e8e\u76ee\u6807\u670d\u52a1\u5668\u8ba4\u8bc1\uff0c\u4e00\u4e2a\u7528\u4e8e\u4ee3\u7406\u670d\u52a1\u5668\u8ba4\u8bc1\u3002\u5982\u679c\u670d\u52a1\u5668\u6216\u8005\u4ee3\u7406\u670d\u52a1\u5668\u9700\u8981\u7528\u6237\u7684\u6388\u6743\u4fe1\u606f\uff0c<code>AuthScope<\/code>\u3001<code>AutoScheme<\/code>\u548c\u8ba4\u8bc1\u4fe1\u606f\u5c31\u4f1a\u88ab\u586b\u5145\u5230\u4e24\u4e2a<code>AuthScope<\/code>\u5b9e\u4f8b\u4e2d\u3002\u901a\u8fc7\u5bf9<code>AutoState<\/code>\u7684\u68c0\u6d4b\uff0c\u6211\u4eec\u53ef\u4ee5\u786e\u5b9a\u8bf7\u6c42\u7684\u6388\u6743\u7c7b\u578b\uff0c\u786e\u5b9a\u662f\u5426\u6709\u5339\u914d\u7684<code>AuthScheme<\/code>\uff0c\u786e\u5b9a\u51ed\u636eprovider\u6839\u636e\u6307\u5b9a\u7684\u6388\u6743\u7c7b\u578b\u662f\u5426\u6210\u529f\u751f\u6210\u4e86\u7528\u6237\u7684\u6388\u6743\u4fe1\u606f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728Http\u8bf7\u6c42\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0cHttpClient\u4f1a\u5411\u6267\u884c\u4e0a\u4e0b\u6587\u4e2d\u6dfb\u52a0\u4e0b\u9762\u7684\u6388\u6743\u5bf9\u8c61\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><code>Lookup<\/code>\u5bf9\u8c61\uff0c\u8868\u793a\u4f7f\u7528\u7684\u8ba4\u8bc1\u65b9\u6848\u3002\u8fd9\u4e2a\u5bf9\u8c61\u7684\u503c\u53ef\u4ee5\u5728\u672c\u5730\u4e0a\u4e0b\u6587\u4e2d\u8fdb\u884c\u8bbe\u7f6e\uff0c\u6765\u8986\u76d6\u9ed8\u8ba4\u503c\u3002<\/li><li><code>CredentialsProvider<\/code>\u5bf9\u8c61\uff0c\u8868\u793a\u8ba4\u8bc1\u65b9\u6848provider\uff0c\u8fd9\u4e2a\u5bf9\u8c61\u7684\u503c\u53ef\u4ee5\u5728\u672c\u5730\u4e0a\u4e0b\u6587\u4e2d\u8fdb\u884c\u8bbe\u7f6e\uff0c\u6765\u8986\u76d6\u9ed8\u8ba4\u503c\u3002<\/li><li><code>AuthState<\/code>\u5bf9\u8c61\uff0c\u8868\u793a\u76ee\u6807\u670d\u52a1\u5668\u7684\u8ba4\u8bc1\u72b6\u6001\uff0c\u8fd9\u4e2a\u5bf9\u8c61\u7684\u503c\u53ef\u4ee5\u5728\u672c\u5730\u4e0a\u4e0b\u6587\u4e2d\u8fdb\u884c\u8bbe\u7f6e\uff0c\u6765\u8986\u76d6\u9ed8\u8ba4\u503c\u3002<\/li><li><code>AuthState<\/code>\u5bf9\u8c61\uff0c\u8868\u793a\u4ee3\u7406\u670d\u52a1\u5668\u7684\u8ba4\u8bc1\u72b6\u6001\uff0c\u8fd9\u4e2a\u5bf9\u8c61\u7684\u503c\u53ef\u4ee5\u5728\u672c\u5730\u4e0a\u4e0b\u6587\u4e2d\u8fdb\u884c\u8bbe\u7f6e\uff0c\u6765\u8986\u76d6\u9ed8\u8ba4\u503c\u3002<\/li><li><code>AuthCache<\/code>\u5bf9\u8c61\uff0c\u8868\u793a\u8ba4\u8bc1\u6570\u636e\u7684\u7f13\u5b58\uff0c\u8fd9\u4e2a\u5bf9\u8c61\u7684\u503c\u53ef\u4ee5\u5728\u672c\u5730\u4e0a\u4e0b\u6587\u4e2d\u8fdb\u884c\u8bbe\u7f6e\uff0c\u6765\u8986\u76d6\u9ed8\u8ba4\u503c\u3002<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u53ef\u4ee5\u5728\u8bf7\u6c42\u6267\u884c\u524d\uff0c\u81ea\u5b9a\u4e49\u672c\u5730<code>HttpContext<\/code>\u5bf9\u8c61\u6765\u8bbe\u7f6e\u9700\u8981\u7684http\u8ba4\u8bc1\u4e0a\u4e0b\u6587;\u4e5f\u53ef\u4ee5\u5728\u8bf7\u6c42\u6267\u884c\u540e\uff0c\u518d\u68c0\u6d4b<code>HttpContext<\/code>\u7684\u72b6\u6001\uff0c\u6765\u67e5\u770b\u6388\u6743\u662f\u5426\u6210\u529f\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>CredentialsProvider&nbsp;credsProvider&nbsp;=&nbsp;&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>Lookup&lt;AuthSchemeProvider&gt;&nbsp;authRegistry&nbsp;=&nbsp;&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>AuthCache&nbsp;authCache&nbsp;=&nbsp;&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>HttpClientContext&nbsp;context&nbsp;=&nbsp;HttpClientContext.create();&nbsp;&nbsp;<\/li><li>context.setCredentialsProvider(credsProvider);&nbsp;&nbsp;<\/li><li>context.setAuthSchemeRegistry(authRegistry);&nbsp;&nbsp;<\/li><li>context.setAuthCache(authCache);&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;http:\/\/somehost\/&#8221;);&nbsp;&nbsp;<\/li><li>CloseableHttpResponse&nbsp;response1&nbsp;=&nbsp;httpclient.execute(httpget,&nbsp;context);&nbsp;&nbsp;<\/li><li>&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>AuthState&nbsp;proxyAuthState&nbsp;=&nbsp;context.getProxyAuthState();&nbsp;&nbsp;<\/li><li>System.out.println(&#8220;Proxy&nbsp;auth&nbsp;state:&nbsp;&#8221;&nbsp;+&nbsp;proxyAuthState.getState());&nbsp;&nbsp;<\/li><li>System.out.println(&#8220;Proxy&nbsp;auth&nbsp;scheme:&nbsp;&#8221;&nbsp;+&nbsp;proxyAuthState.getAuthScheme());&nbsp;&nbsp;<\/li><li>System.out.println(&#8220;Proxy&nbsp;auth&nbsp;credentials:&nbsp;&#8221;&nbsp;+&nbsp;proxyAuthState.getCredentials());&nbsp;&nbsp;<\/li><li>AuthState&nbsp;targetAuthState&nbsp;=&nbsp;context.getTargetAuthState();&nbsp;&nbsp;<\/li><li>System.out.println(&#8220;Target&nbsp;auth&nbsp;state:&nbsp;&#8221;&nbsp;+&nbsp;targetAuthState.getState());&nbsp;&nbsp;<\/li><li>System.out.println(&#8220;Target&nbsp;auth&nbsp;scheme:&nbsp;&#8221;&nbsp;+&nbsp;targetAuthState.getAuthScheme());&nbsp;&nbsp;<\/li><li>System.out.println(&#8220;Target&nbsp;auth&nbsp;credentials:&nbsp;&#8221;&nbsp;+&nbsp;targetAuthState.getCredentials());&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">4.5. \u7f13\u5b58\u8ba4\u8bc1\u6570\u636e<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ece\u7248\u672c4.1\u5f00\u59cb\uff0cHttpClient\u5c31\u4f1a\u81ea\u52a8\u7f13\u5b58\u9a8c\u8bc1\u901a\u8fc7\u7684\u8ba4\u8bc1\u4fe1\u606f\u3002\u4f46\u662f\u4e3a\u4e86\u4f7f\u7528\u8fd9\u4e2a\u7f13\u5b58\u7684\u8ba4\u8bc1\u4fe1\u606f\uff0c\u6211\u4eec\u5fc5\u987b\u5728\u540c\u4e00\u4e2a\u4e0a\u4e0b\u6587\u4e2d\u6267\u884c\u903b\u8f91\u76f8\u5173\u7684\u8bf7\u6c42\u3002\u4e00\u65e6\u8d85\u51fa\u8be5\u4e0a\u4e0b\u6587\u7684\u4f5c\u7528\u8303\u56f4\uff0c\u7f13\u5b58\u7684\u8ba4\u8bc1\u4fe1\u606f\u5c31\u4f1a\u5931\u6548\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4.6. \u62a2\u5148\u8ba4\u8bc1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u9ed8\u8ba4\u4e0d\u652f\u6301\u62a2\u5148\u8ba4\u8bc1\uff0c\u56e0\u4e3a\u4e00\u65e6\u62a2\u5148\u8ba4\u8bc1\u88ab\u8bef\u7528\u6216\u8005\u9519\u7528\uff0c\u4f1a\u5bfc\u81f4\u4e00\u7cfb\u5217\u7684\u5b89\u5168\u95ee\u9898\uff0c\u6bd4\u5982\u4f1a\u628a\u7528\u6237\u7684\u8ba4\u8bc1\u4fe1\u606f\u4ee5\u660e\u6587\u7684\u65b9\u5f0f\u53d1\u9001\u7ed9\u672a\u6388\u6743\u7684\u7b2c\u4e09\u65b9\u670d\u52a1\u5668\u3002\u56e0\u6b64\uff0c\u9700\u8981\u7528\u6237\u81ea\u5df1\u6839\u636e\u81ea\u5df1\u5e94\u7528\u7684\u5177\u4f53\u73af\u5883\u6765\u8bc4\u4f30\u62a2\u5148\u8ba4\u8bc1\u5e26\u6765\u7684\u597d\u5904\u548c\u5e26\u6765\u7684\u98ce\u9669\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5373\u4f7f\u5982\u6b64\uff0cHttpClient\u8fd8\u662f\u5141\u8bb8\u6211\u4eec\u901a\u8fc7\u914d\u7f6e\u6765\u542f\u7528\u62a2\u5148\u8ba4\u8bc1\uff0c\u65b9\u6cd5\u662f\u63d0\u524d\u586b\u5145\u8ba4\u8bc1\u4fe1\u606f\u7f13\u5b58\u5230\u4e0a\u4e0b\u6587\u4e2d\uff0c\u8fd9\u6837\uff0c\u4ee5\u8fd9\u4e2a\u4e0a\u4e0b\u6587\u6267\u884c\u7684\u65b9\u6cd5\uff0c\u5c31\u4f1a\u4f7f\u7528\u62a2\u5148\u8ba4\u8bc1\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>HttpHost&nbsp;targetHost&nbsp;=&nbsp;new&nbsp;HttpHost(&#8220;localhost&#8221;,&nbsp;80,&nbsp;&#8220;http&#8221;);&nbsp;&nbsp;<\/li><li>CredentialsProvider&nbsp;credsProvider&nbsp;=&nbsp;new&nbsp;BasicCredentialsProvider();&nbsp;&nbsp;<\/li><li>credsProvider.setCredentials(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;AuthScope(targetHost.getHostName(),&nbsp;targetHost.getPort()),&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;UsernamePasswordCredentials(&#8220;username&#8221;,&nbsp;&#8220;password&#8221;));&nbsp;&nbsp;<\/li><li>\/\/&nbsp;Create&nbsp;AuthCache&nbsp;instance&nbsp;&nbsp;<\/li><li>AuthCache&nbsp;authCache&nbsp;=&nbsp;new&nbsp;BasicAuthCache();&nbsp;&nbsp;<\/li><li>\/\/&nbsp;Generate&nbsp;BASIC&nbsp;scheme&nbsp;object&nbsp;and&nbsp;add&nbsp;it&nbsp;to&nbsp;the&nbsp;local&nbsp;auth&nbsp;cache&nbsp;&nbsp;<\/li><li>BasicScheme&nbsp;basicAuth&nbsp;=&nbsp;new&nbsp;BasicScheme();&nbsp;&nbsp;<\/li><li>authCache.put(targetHost,&nbsp;basicAuth);&nbsp;&nbsp;<\/li><li>\/\/&nbsp;Add&nbsp;AuthCache&nbsp;to&nbsp;the&nbsp;execution&nbsp;context&nbsp;&nbsp;<\/li><li>HttpClientContext&nbsp;context&nbsp;=&nbsp;HttpClientContext.create();&nbsp;&nbsp;<\/li><li>context.setCredentialsProvider(credsProvider);&nbsp;&nbsp;<\/li><li>context.setAuthCache(authCache);&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;\/&#8221;);&nbsp;&nbsp;<\/li><li>for&nbsp;(int&nbsp;i&nbsp;=&nbsp;0;&nbsp;i&nbsp;&lt;&nbsp;3;&nbsp;i++)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;CloseableHttpResponse&nbsp;response&nbsp;=&nbsp;httpclient.execute(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;targetHost,&nbsp;httpget,&nbsp;context);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HttpEntity&nbsp;entity&nbsp;=&nbsp;response.getEntity();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;response.close();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">4.7. NTLM\u8ba4\u8bc1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ece\u7248\u672c4.1\u5f00\u59cb\uff0cHttpClient\u5c31\u5168\u9762\u652f\u6301NTLMv1\u3001NTLMv2\u548cNTLM2\u8ba4\u8bc1\u3002\u5f53\u4eba\u6211\u4eec\u53ef\u4ee5\u4ecd\u65e7\u4f7f\u7528\u5916\u90e8\u7684NTLM\u5f15\u64ce\uff08\u6bd4\u5982Samba\u5f00\u53d1\u7684JCIFS\u5e93\uff09\u4f5c\u4e3a\u4e0eWindows\u4e92\u64cd\u4f5c\u6027\u7a0b\u5e8f\u7684\u4e00\u90e8\u5206\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.7.1. NTLM\u8fde\u63a5\u6301\u4e45\u6027<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u76f8\u6bd4<code>Basic<\/code>\u548c<code>Digest<\/code>\u8ba4\u8bc1\uff0cNTLM\u8ba4\u8bc1\u8981\u660e\u663e\u9700\u8981\u66f4\u591a\u7684\u8ba1\u7b97\u5f00\u9500\uff0c\u6027\u80fd\u5f71\u54cd\u4e5f\u6bd4\u8f83\u5927\u3002\u8fd9\u4e5f\u53ef\u80fd\u662f\u5fae\u8f6f\u628aNTLM\u534f\u8bae\u8bbe\u8ba1\u6210\u6709\u72b6\u6001\u8fde\u63a5\u7684\u4e3b\u8981\u539f\u56e0\u4e4b\u4e00\u3002\u4e5f\u5c31\u662f\u8bf4\uff0cNTLM\u8fde\u63a5\u4e00\u65e6\u5efa\u7acb\uff0c\u7528\u6237\u7684\u8eab\u4efd\u5c31\u4f1a\u5728\u5176\u6574\u4e2a\u751f\u547d\u5468\u671f\u548c\u5b83\u76f8\u5173\u8054\u3002NTLM\u8fde\u63a5\u7684\u72b6\u6001\u6027\u4f7f\u5f97\u8fde\u63a5\u6301\u4e45\u6027\u66f4\u52a0\u590d\u6742\uff0cThe stateful nature of NTLM connections makes connection persistence more complex, as for the obvious reason persistent NTLM connections may not be re-used by users with a different user identity. HttpClient\u4e2d\u6807\u51c6\u7684\u8fde\u63a5\u7ba1\u7406\u5668\u5c31\u53ef\u4ee5\u7ba1\u7406\u6709\u72b6\u6001\u7684\u8fde\u63a5\u3002\u4f46\u662f\uff0c\u540c\u4e00\u4f1a\u8bdd\u4e2d\u903b\u8f91\u76f8\u5173\u7684\u8bf7\u6c42\uff0c\u5fc5\u987b\u4f7f\u7528\u76f8\u540c\u7684\u6267\u884c\u4e0a\u4e0b\u6587\uff0c\u8fd9\u6837\u624d\u80fd\u4f7f\u7528\u7528\u6237\u7684\u8eab\u4efd\u4fe1\u606f\u3002\u5426\u5219\uff0cHttpClient\u5c31\u4f1a\u7ed3\u675f\u65e7\u7684\u8fde\u63a5\uff0c\u4e3a\u4e86\u83b7\u53d6\u88abNTLM\u534f\u8bae\u4fdd\u62a4\u7684\u8d44\u6e90\uff0c\u800c\u4e3a\u6bcf\u4e2aHTTP\u8bf7\u6c42\uff0c\u521b\u5efa\u4e00\u4e2a\u65b0\u7684Http\u8fde\u63a5\u3002\u66f4\u65b0\u5173\u4e8eHttp\u72b6\u6001\u8fde\u63a5\u7684\u4fe1\u606f\uff0c\u70b9\u51fb<a href=\"http:\/\/hc.apache.org\/httpcomponents-client-ga\/tutorial\/html\/advanced.html#stateful_conn\">\u6b64\u5904<\/a>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7531\u4e8eNTLM\u8fde\u63a5\u662f\u6709\u72b6\u6001\u7684\uff0c\u4e00\u822c\u63a8\u8350\u4f7f\u7528\u6bd4\u8f83\u8f7b\u91cf\u7ea7\u7684\u65b9\u6cd5\u6765\u5904\u7f5aNTLM\u8ba4\u8bc1\uff08\u5982GET\u3001Head\u65b9\u6cd5\uff09\uff0c\u7136\u540e\u4f7f\u7528\u8fd9\u4e2a\u5df2\u7ecf\u5efa\u7acb\u7684\u8fde\u63a5\u5728\u6267\u884c\u76f8\u5bf9\u91cd\u91cf\u7ea7\u7684\u65b9\u6cd5\uff0c\u5c24\u5176\u662f\u9700\u8981\u9644\u4ef6\u8bf7\u6c42\u5b9e\u4f53\u7684\u8bf7\u6c42\uff08\u5982POST\u3001PUT\u8bf7\u6c42\uff09\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;&lt;&#8230;&gt;&nbsp;&nbsp;<\/li><li>CredentialsProvider&nbsp;credsProvider&nbsp;=&nbsp;new&nbsp;BasicCredentialsProvider();&nbsp;&nbsp;<\/li><li>credsProvider.setCredentials(AuthScope.ANY,&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;NTCredentials(&#8220;user&#8221;,&nbsp;&#8220;pwd&#8221;,&nbsp;&#8220;myworkstation&#8221;,&nbsp;&#8220;microsoft.com&#8221;));&nbsp;&nbsp;<\/li><li>HttpHost&nbsp;target&nbsp;=&nbsp;new&nbsp;HttpHost(&#8220;www.microsoft.com&#8221;,&nbsp;80,&nbsp;&#8220;http&#8221;);&nbsp;&nbsp;<\/li><li>\/\/&nbsp;Make&nbsp;sure&nbsp;the&nbsp;same&nbsp;context&nbsp;is&nbsp;used&nbsp;to&nbsp;execute&nbsp;logically&nbsp;related&nbsp;requests&nbsp;&nbsp;<\/li><li>HttpClientContext&nbsp;context&nbsp;=&nbsp;HttpClientContext.create();&nbsp;&nbsp;<\/li><li>context.setCredentialsProvider(credsProvider);&nbsp;&nbsp;<\/li><li>\/\/&nbsp;Execute&nbsp;a&nbsp;cheap&nbsp;method&nbsp;first.&nbsp;This&nbsp;will&nbsp;trigger&nbsp;NTLM&nbsp;authentication&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;\/ntlm-protected\/info&#8221;);&nbsp;&nbsp;<\/li><li>CloseableHttpResponse&nbsp;response1&nbsp;=&nbsp;httpclient.execute(target,&nbsp;httpget,&nbsp;context);&nbsp;&nbsp;<\/li><li>try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;HttpEntity&nbsp;entity1&nbsp;=&nbsp;response1.getEntity();&nbsp;&nbsp;<\/li><li>}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;response1.close();&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><li>\/\/&nbsp;Execute&nbsp;an&nbsp;expensive&nbsp;method&nbsp;next&nbsp;reusing&nbsp;the&nbsp;same&nbsp;context&nbsp;(and&nbsp;connection)&nbsp;&nbsp;<\/li><li>HttpPost&nbsp;httppost&nbsp;=&nbsp;new&nbsp;HttpPost(&#8220;\/ntlm-protected\/form&#8221;);&nbsp;&nbsp;<\/li><li>httppost.setEntity(new&nbsp;StringEntity(&#8220;lots&nbsp;and&nbsp;lots&nbsp;of&nbsp;data&#8221;));&nbsp;&nbsp;<\/li><li>CloseableHttpResponse&nbsp;response2&nbsp;=&nbsp;httpclient.execute(target,&nbsp;httppost,&nbsp;context);&nbsp;&nbsp;<\/li><li>try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;HttpEntity&nbsp;entity2&nbsp;=&nbsp;response2.getEntity();&nbsp;&nbsp;<\/li><li>}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;response2.close();&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">4.8. SPNEGO\/Kerberos\u8ba4\u8bc1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">SPNEGO(Simple and Protected GSSAPI Megotiation Mechanism\uff09\uff0c\u5f53\u53cc\u65b9\u5747\u4e0d\u77e5\u9053\u5bf9\u65b9\u80fd\u4f7f\u7528\/\u63d0\u4f9b\u4ec0\u4e48\u534f\u8bae\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528SP\u8ba4\u8bc1\u534f\u8bae\u3002\u8fd9\u79cd\u534f\u8bae\u5728Kerberos\u8ba4\u8bc1\u65b9\u6848\u4e2d\u7ecf\u5e38\u4f7f\u7528\u3002It can wrap other mechanisms, however the current version in HttpClient is designed solely with Kerberos in mind.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.8.1. \u5728HTTPCIENT\u4e2d\u4f7f\u7528SPNEGO<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">SPNEGO\u8ba4\u8bc1\u65b9\u6848\u517c\u5bb9Sun java 1.5\u53ca\u4ee5\u4e0a\u7248\u672c\u3002\u4f46\u662f\u5f3a\u70c8\u63a8\u8350jdk1.6\u4ee5\u4e0a\u3002Sun\u7684JRE\u63d0\u4f9b\u7684\u7c7b\u5c31\u5df2\u7ecf\u51e0\u4e4e\u5b8c\u5168\u53ef\u4ee5\u5904\u7406Kerberos\u548cSPNEGO token\u3002\u8fd9\u5c31\u610f\u5473\u7740\uff0c\u9700\u8981\u8bbe\u7f6e\u5f88\u591a\u7684GSS\u7c7b\u3002<code>SpnegoScheme<\/code>\u662f\u4e2a\u5f88\u7b80\u5355\u7684\u7c7b\uff0c\u53ef\u4ee5\u7528\u5b83\u6765handle marshalling the tokens and \u8bfb\u5199\u6b63\u786e\u7684\u5934\u6d88\u606f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u597d\u7684\u5f00\u59cb\u65b9\u6cd5\u5c31\u662f\u4ece\u793a\u4f8b\u7a0b\u5e8f\u4e2d\u627e\u5230<code>KerberosHttpClient.java<\/code>\u8fd9\u4e2a\u6587\u4ef6\uff0c\u5c1d\u8bd5\u8ba9\u5b83\u8fd0\u884c\u8d77\u6765\u3002\u8fd0\u884c\u8fc7\u7a0b\u6709\u53ef\u80fd\u4f1a\u51fa\u73b0\u5f88\u591a\u95ee\u9898\uff0c\u4f46\u662f\u5982\u679c\u4eba\u54c1\u6bd4\u8f83\u9ad8\u53ef\u80fd\u4f1a\u987a\u5229\u4e00\u70b9\u3002\u8fd9\u4e2a\u6587\u4ef6\u4f1a\u63d0\u4f9b\u4e00\u4e9b\u8f93\u51fa\uff0c\u6765\u5e2e\u6211\u4eec\u8c03\u8bd5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728Windows\u7cfb\u7edf\u4e2d\uff0c\u5e94\u8be5\u9ed8\u8ba4\u4f7f\u7528\u7528\u6237\u7684\u767b\u9646\u51ed\u636e;\u5f53\u7136\u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528<code>kinit<\/code>\u6765\u8986\u76d6\u8fd9\u4e2a\u51ed\u636e\uff0c\u6bd4\u5982<code>$JAVA_HOME\\bin\\kinit testuser@AD.EXAMPLE.NET<\/code>\uff0c\u8fd9\u5728\u6211\u4eec\u6d4b\u8bd5\u548c\u8c03\u8bd5\u7684\u65f6\u5019\u5c31\u663e\u5f97\u5f88\u6709\u7528\u4e86\u3002\u5982\u679c\u60f3\u7528\u56deWindows\u9ed8\u8ba4\u7684\u767b\u9646\u51ed\u636e\uff0c\u5220\u9664kinit\u521b\u5efa\u7684\u7f13\u5b58\u6587\u4ef6\u5373\u53ef\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u786e\u4fdd\u5728krb5.conf\u6587\u4ef6\u4e2d\u5217\u51fa<code>domain_realms<\/code>\u3002\u8fd9\u80fd\u89e3\u51b3\u5f88\u591a\u4e0d\u5fc5\u8981\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.8.2. \u4f7f\u7528GSS\/JAVA KERBEROS<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u7684\u8fd9\u4efd\u6587\u6863\u662f\u9488\u5bf9Windows\u7cfb\u7edf\u7684\uff0c\u4f46\u662f\u5f88\u591a\u4fe1\u606f\u540c\u6837\u9002\u5408Unix\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>org.ietf.jgss<\/code>\u8fd9\u4e2a\u7c7b\u6709\u5f88\u591a\u7684\u914d\u7f6e\u53c2\u6570\uff0c\u8fd9\u4e9b\u53c2\u6570\u5927\u90e8\u5206\u90fd\u5728<code>krb5.conf\/krb5.ini<\/code>\u6587\u4ef6\u4e2d\u914d\u7f6e\u3002\u66f4\u591a\u7684\u4fe1\u606f\uff0c\u53c2\u8003<a href=\"http:\/\/web.mit.edu\/kerberos\/krb5-1.4\/krb5-1.4.1\/doc\/krb5-admin\/krb5.conf.html.\">\u6b64\u5904<\/a>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">login.conf\u6587\u4ef6<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u662f\u4e00\u4e2a\u57fa\u672c\u7684login.conf\u6587\u4ef6\uff0c\u4f7f\u7528\u4e8eWindows\u5e73\u53f0\u7684IIS\u548cJBoss Negotiation\u6a21\u5757\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7cfb\u7edf\u914d\u7f6e\u6587\u4ef6<code>java.security.auth.login.config<\/code>\u53ef\u4ee5\u6307\u5b9a<code>login.conf<\/code>\u6587\u4ef6\u7684\u8def\u5f84\u3002<br><code>login.conf<\/code>\u7684\u5185\u5bb9\u53ef\u80fd\u4f1a\u662f\u4e0b\u9762\u7684\u6837\u5b50\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>com.sun.security.jgss.login&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;com.sun.security.auth.module.Krb5LoginModule&nbsp;required&nbsp;client=TRUE&nbsp;useTicketCache=true;&nbsp;&nbsp;<\/li><li>};&nbsp;&nbsp;<\/li><li>com.sun.security.jgss.initiate&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;com.sun.security.auth.module.Krb5LoginModule&nbsp;required&nbsp;client=TRUE&nbsp;useTicketCache=true;&nbsp;&nbsp;<\/li><li>};&nbsp;&nbsp;<\/li><li>com.sun.security.jgss.accept&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;com.sun.security.auth.module.Krb5LoginModule&nbsp;required&nbsp;client=TRUE&nbsp;useTicketCache=true;&nbsp;&nbsp;<\/li><li>};&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">4.8.4. KRB5.CONF \/ KRB5.INI \u6587\u4ef6<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u6ca1\u6709\u624b\u52a8\u6307\u5b9a\uff0c\u7cfb\u7edf\u4f1a\u4f7f\u7528\u9ed8\u8ba4\u914d\u7f6e\u3002\u5982\u679c\u8981\u624b\u52a8\u6307\u5b9a\uff0c\u53ef\u4ee5\u5728<code>java.security.krb5.conf<\/code>\u4e2d\u8bbe\u7f6e\u7cfb\u7edf\u53d8\u91cf\uff0c\u6307\u5b9a<code>krb5.conf<\/code>\u7684\u8def\u5f84\u3002<code>krb5.conf<\/code>\u7684\u5185\u5bb9\u53ef\u80fd\u662f\u4e0b\u9762\u7684\u6837\u5b50\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>[libdefaults]&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;default_realm&nbsp;=&nbsp;AD.EXAMPLE.NET&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;udp_preference_limit&nbsp;=&nbsp;1&nbsp;&nbsp;<\/li><li>[realms]&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;AD.EXAMPLE.NET&nbsp;=&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;kdc&nbsp;=&nbsp;KDC.AD.EXAMPLE.NET&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>[domain_realms]&nbsp;&nbsp;<\/li><li>.ad.example.net=AD.EXAMPLE.NET&nbsp;&nbsp;<\/li><li>ad.example.net=AD.EXAMPLE.NET&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">4.8.5. WINDOWS\u8be6\u7ec6\u7684\u914d\u7f6e<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u5141\u8bb8Windows\u4f7f\u7528\u5f53\u524d\u7528\u6237\u7684tickets\uff0c<code>javax.security.auth.useSubjectCredsOnly<\/code>\u8fd9\u4e2a\u7cfb\u7edf\u53d8\u91cf\u5e94\u8be5\u8bbe\u7f6e\u6210<code>false<\/code>\uff0c\u5e76\u4e14\u9700\u8981\u5728Windows\u6ce8\u518c\u8868\u4e2d\u6dfb\u52a0<code>allowtgtsessionkey<\/code>\u8fd9\u4e2a\u9879\uff0c\u800c\u4e14\u8981allow session keys to be sent in the Kerberos Ticket-Granting Ticket.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Windows Server 2003\u548cWindows 2000 SP4,\u914d\u7f6e\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>HKEY_LOCAL_MACHINE\\System\\CurrentControlSet\\Control\\Lsa\\Kerberos\\Parameters&nbsp;&nbsp;<\/li><li>Value&nbsp;Name:&nbsp;allowtgtsessionkey&nbsp;&nbsp;<\/li><li>Value&nbsp;Type:&nbsp;REG_DWORD&nbsp;&nbsp;<\/li><li>Value:&nbsp;0x01&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Windows XP SP2 \u914d\u7f6e\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>HKEY_LOCAL_MACHINE\\System\\CurrentControlSet\\Control\\Lsa\\Kerberos\\&nbsp;&nbsp;<\/li><li>Value&nbsp;Name:&nbsp;allowtgtsessionkey&nbsp;&nbsp;<\/li><li>Value&nbsp;Type:&nbsp;REG_DWORD&nbsp;&nbsp;<\/li><li>Value:&nbsp;0x01&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h1 class=\"wp-block-heading\">\u7b2c\u4e94\u7ae0 \u5feb\u901fAPI<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">5.1. Easy to use facade API<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u4ece4.2\u5f00\u59cb\u652f\u6301\u5feb\u901fapi\u3002\u5feb\u901fapi\u4ec5\u4ec5\u5b9e\u73b0\u4e86HttpClient\u7684\u57fa\u672c\u529f\u80fd\uff0c\u5b83\u53ea\u8981\u7528\u4e8e\u4e00\u4e9b\u4e0d\u9700\u8981\u7075\u6d3b\u6027\u7684\u7b80\u5355\u573a\u666f\u3002\u4f8b\u5982\uff0c\u5feb\u901fapi\u4e0d\u9700\u8981\u7528\u6237\u5904\u7406\u8fde\u63a5\u7ba1\u7406\u548c\u8d44\u6e90\u91ca\u653e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u662f\u51e0\u4e2a\u4f7f\u7528\u5feb\u901fapi\u7684\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>\/\/&nbsp;Execute&nbsp;a&nbsp;GET&nbsp;with&nbsp;timeout&nbsp;settings&nbsp;and&nbsp;return&nbsp;response&nbsp;content&nbsp;as&nbsp;String.&nbsp;&nbsp;<\/li><li>Request.Get(&#8220;http:\/\/somehost\/&#8221;)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.connectTimeout(1000)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.socketTimeout(1000)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.execute().returnContent().asString();&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<ol class=\"wp-block-list\"><li>\/\/&nbsp;Execute&nbsp;a&nbsp;POST&nbsp;with&nbsp;the&nbsp;&#8216;expect-continue&#8217;&nbsp;handshake,&nbsp;using&nbsp;HTTP\/1.1,&nbsp;&nbsp;<\/li><li>\/\/&nbsp;containing&nbsp;a&nbsp;request&nbsp;body&nbsp;as&nbsp;String&nbsp;and&nbsp;return&nbsp;response&nbsp;content&nbsp;as&nbsp;byte&nbsp;array.&nbsp;&nbsp;<\/li><li>Request.Post(&#8220;http:\/\/somehost\/do-stuff&#8221;)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.useExpectContinue()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.version(HttpVersion.HTTP_1_1)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.bodyString(&#8220;Important&nbsp;stuff&#8221;,&nbsp;ContentType.DEFAULT_TEXT)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.execute().returnContent().asBytes();&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<ol class=\"wp-block-list\"><li>\/\/&nbsp;Execute&nbsp;a&nbsp;POST&nbsp;with&nbsp;a&nbsp;custom&nbsp;header&nbsp;through&nbsp;the&nbsp;proxy&nbsp;containing&nbsp;a&nbsp;request&nbsp;body&nbsp;&nbsp;<\/li><li>\/\/&nbsp;as&nbsp;an&nbsp;HTML&nbsp;form&nbsp;and&nbsp;save&nbsp;the&nbsp;result&nbsp;to&nbsp;the&nbsp;file&nbsp;&nbsp;<\/li><li>Request.Post(&#8220;http:\/\/somehost\/some-form&#8221;)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.addHeader(&#8220;X-Custom-header&#8221;,&nbsp;&#8220;stuff&#8221;)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.viaProxy(new&nbsp;HttpHost(&#8220;myproxy&#8221;,&nbsp;8080))&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.bodyForm(Form.form().add(&#8220;username&#8221;,&nbsp;&#8220;vip&#8221;).add(&#8220;password&#8221;,&nbsp;&#8220;secret&#8221;).build())&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.execute().saveContent(new&nbsp;File(&#8220;result.dump&#8221;));&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><br>\u5982\u679c\u9700\u8981\u5728\u6307\u5b9a\u7684\u5b89\u5168\u4e0a\u4e0b\u6587\u4e2d\u6267\u884c\u67d0\u4e9b\u8bf7\u6c42\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528Exector\uff0c\u8fd9\u65f6\u5019\u7528\u6237\u7684\u8ba4\u8bc1\u4fe1\u606f\u5c31\u4f1a\u88ab\u7f13\u5b58\u8d77\u6765\uff0c\u4ee5\u4fbf\u540e\u7eed\u7684\u8bf7\u6c42\u4f7f\u7528\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Executor&nbsp;executor&nbsp;=&nbsp;Executor.newInstance()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.auth(new&nbsp;HttpHost(&#8220;somehost&#8221;),&nbsp;&#8220;username&#8221;,&nbsp;&#8220;password&#8221;)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.auth(new&nbsp;HttpHost(&#8220;myproxy&#8221;,&nbsp;8080),&nbsp;&#8220;username&#8221;,&nbsp;&#8220;password&#8221;)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.authPreemptive(new&nbsp;HttpHost(&#8220;myproxy&#8221;,&nbsp;8080));&nbsp;&nbsp;<\/li><li>executor.execute(Request.Get(&#8220;http:\/\/somehost\/&#8221;))&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.returnContent().asString();&nbsp;&nbsp;<\/li><li>executor.execute(Request.Post(&#8220;http:\/\/somehost\/do-stuff&#8221;)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.useExpectContinue()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.bodyString(&#8220;Important&nbsp;stuff&#8221;,&nbsp;ContentType.DEFAULT_TEXT))&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.returnContent().asString();&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">5.1.1. \u54cd\u5e94\u5904\u7406<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u822c\u60c5\u51b5\u4e0b\uff0cHttpClient\u7684\u5feb\u901fapi\u4e0d\u7528\u7528\u6237\u5904\u7406\u8fde\u63a5\u7ba1\u7406\u548c\u8d44\u6e90\u91ca\u653e\u3002\u4f46\u662f\uff0c\u8fd9\u6837\u7684\u8bdd\uff0c\u5c31\u5fc5\u987b\u5728\u5185\u5b58\u4e2d\u7f13\u5b58\u8fd9\u4e9b\u54cd\u5e94\u6d88\u606f\u3002\u4e3a\u4e86\u907f\u514d\u8fd9\u4e00\u60c5\u51b5\uff0c\u5efa\u8bae\u4f7f\u7528\u4f7f\u7528ResponseHandler\u6765\u5904\u7406Http\u54cd\u5e94\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Document&nbsp;result&nbsp;=&nbsp;Request.Get(&#8220;http:\/\/somehost\/content&#8221;)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.execute().handleResponse(new&nbsp;ResponseHandler&lt;Document&gt;()&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;Document&nbsp;handleResponse(final&nbsp;HttpResponse&nbsp;response)&nbsp;throws&nbsp;IOException&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;StatusLine&nbsp;statusLine&nbsp;=&nbsp;response.getStatusLine();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HttpEntity&nbsp;entity&nbsp;=&nbsp;response.getEntity();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(statusLine.getStatusCode()&nbsp;&gt;=&nbsp;300)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;throw&nbsp;new&nbsp;HttpResponseException(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;statusLine.getStatusCode(),&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;statusLine.getReasonPhrase());&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(entity&nbsp;==&nbsp;null)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;throw&nbsp;new&nbsp;ClientProtocolException(&#8220;Response&nbsp;contains&nbsp;no&nbsp;content&#8221;);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;DocumentBuilderFactory&nbsp;dbfac&nbsp;=&nbsp;DocumentBuilderFactory.newInstance();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;DocumentBuilder&nbsp;docBuilder&nbsp;=&nbsp;dbfac.newDocumentBuilder();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ContentType&nbsp;contentType&nbsp;=&nbsp;ContentType.getOrDefault(entity);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(!contentType.equals(ContentType.APPLICATION_XML))&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;throw&nbsp;new&nbsp;ClientProtocolException(&#8220;Unexpected&nbsp;content&nbsp;type:&#8221;&nbsp;+&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;contentType);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;String&nbsp;charset&nbsp;=&nbsp;contentType.getCharset();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(charset&nbsp;==&nbsp;null)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;charset&nbsp;=&nbsp;HTTP.DEFAULT_CONTENT_CHARSET;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;docBuilder.parse(entity.getContent(),&nbsp;charset);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;catch&nbsp;(ParserConfigurationException&nbsp;ex)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;throw&nbsp;new&nbsp;IllegalStateException(ex);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;catch&nbsp;(SAXException&nbsp;ex)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;throw&nbsp;new&nbsp;ClientProtocolException(&#8220;Malformed&nbsp;XML&nbsp;document&#8221;,&nbsp;ex);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;});&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h1 class=\"wp-block-heading\">\u7b2c\u516d\u7ae0 HTTP\u7f13\u5b58<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">6.1. \u57fa\u672c\u6982\u5ff5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u7684\u7f13\u5b58\u673a\u5236\u63d0\u4f9b\u4e00\u4e2a\u4e0eHTTP\/1.1\u6807\u51c6\u517c\u5bb9\u7684\u7f13\u5b58\u5c42 \u2013 \u76f8\u5f53\u4e8eJava\u7684\u6d4f\u89c8\u5668\u7f13\u5b58\u3002HttpClient\u7f13\u5b58\u673a\u5236\u7684\u5b9e\u73b0\u9075\u5faa\u8d23\u4efb\u94fe\uff08Chain of Responsibility\uff09\u8bbe\u8ba1\u539f\u5219\uff0c\u9ed8\u8ba4\u7684HttpClient\u662f\u6ca1\u6709\u7f13\u5b58\u7684\uff0c\u6709\u7f13\u5b58\u673a\u5236\u7684HttpClient\u53ef\u4ee5\u7528\u6765\u4e34\u65f6\u66ff\u4ee3\u9ed8\u8ba4\u7684HttpClient\uff0c\u5982\u679c\u5f00\u542f\u4e86\u7f13\u5b58\uff0c\u6211\u4eec\u7684\u8bf7\u6c42\u7ed3\u679c\u5c31\u4f1a\u4ece\u7f13\u5b58\u4e2d\u83b7\u53d6\uff0c\u800c\u4e0d\u662f\u4ece\u76ee\u6807\u670d\u52a1\u5668\u4e2d\u83b7\u53d6\u3002\u5982\u679c\u5728Get\u8bf7\u6c42\u5934\u4e2d\u8bbe\u7f6e\u4e86<code>If-Modified-Since<\/code>\u6216\u8005<code>If-None-Match<\/code>\u53c2\u6570\uff0c\u90a3\u4e48HttpClient\u4f1a\u81ea\u52a8\u5411\u670d\u52a1\u5668\u6821\u9a8c\u7f13\u5b58\u662f\u5426\u8fc7\u671f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HTTP\/1.1\u7248\u672c\u7684\u7f13\u5b58\u662f\u8bed\u4e49\u900f\u660e\u7684\uff0c\u610f\u601d\u662f\u65e0\u8bba\u600e\u6837\uff0c\u7f13\u5b58\u90fd\u4e0d\u5e94\u8be5\u4fee\u6539\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u4f20\u8f93\u7684\u8bf7\u6c42\/\u54cd\u5e94\u6570\u636e\u5305\u3002\u56e0\u6b64\uff0c\u5728existing compliant client-server relationship\u4e2d\u4f7f\u7528\u5e26\u6709\u7f13\u5b58\u7684HttpClient\u4e5f\u5e94\u8be5\u662f\u5b89\u5168\u7684\u3002\u867d\u7136\u7f13\u5b58\u662f\u5ba2\u6237\u7aef\u7684\u4e00\u90e8\u5206\uff0c\u4f46\u662f\u4eceHttp\u534f\u8bae\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u7f13\u5b58\u673a\u5236\u662f\u4e3a\u4e86\u517c\u5bb9\u900f\u660e\u7684\u7f13\u5b58\u4ee3\u7406\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u540e\uff0cHttpClient\u7f13\u5b58\u4e5f\u652f\u6301RFC 5861\u89c4\u5b9a\u7684Cache-Control\u62d3\u5c55\uff08<code>stale-if-error'\u548c<\/code>stale-while-revalidate`)\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u5f00\u542f\u7f13\u5b58\u7684HttpClient\u6267\u884c\u4e00\u4e2aHttp\u8bf7\u6c42\u65f6\uff0c\u4f1a\u7ecf\u8fc7\u4e0b\u9762\u7684\u6b65\u9aa4\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u68c0\u67e5http\u8bf7\u6c42\u662f\u5426\u7b26\u5408HTTP 1.1\u7684\u57fa\u672c\u8981\u6c42\uff0c\u5982\u679c\u4e0d\u7b26\u5408\u5c31\u5c1d\u8bd5\u4fee\u6b63\u9519\u8bef\u3002<\/li><li>\u5237\u65b0\u8be5\u8bf7\u6c42\u65e0\u6548\u7684\u7f13\u5b58\u9879\u3002\uff08Flush any cache entries which would be invalidated by this request.\uff09<\/li><li>\u68c0\u6d4b\u8be5\u8bf7\u6c42\u662f\u5426\u53ef\u4ee5\u4ece\u7f13\u5b58\u4e2d\u83b7\u53d6\u3002\u5982\u679c\u4e0d\u80fd\uff0c\u76f4\u63a5\u5c06\u8bf7\u6c42\u53d1\u9001\u7ed9\u76ee\u6807\u670d\u52a1\u5668\uff0c\u83b7\u53d6\u54cd\u5e94\u5e76\u52a0\u5165\u7f13\u5b58\u3002<\/li><li>\u5982\u679c\u8be5\u8bf7\u6c42\u53ef\u4ee5\u4ece\u7f13\u5b58\u4e2d\u83b7\u53d6\uff0cHttpClient\u5c31\u5c1d\u8bd5\u8bfb\u53d6\u7f13\u5b58\u4e2d\u7684\u6570\u636e\u3002\u5982\u679c\u8bfb\u53d6\u5931\u8d25\uff0c\u5c31\u4f1a\u53d1\u9001\u8bf7\u6c42\u5230\u76ee\u6807\u670d\u52a1\u5668\uff0c\u5982\u679c\u53ef\u80fd\u7684\u8bdd\uff0c\u5c31\u628a\u54cd\u5e94\u7f13\u5b58\u8d77\u6765\u3002<\/li><li>\u5982\u679cHttpClient\u7f13\u5b58\u7684\u54cd\u5e94\u53ef\u4ee5\u76f4\u63a5\u8fd4\u56de\u7ed9\u8bf7\u6c42\uff0cHttpClient\u5c31\u4f1a\u6784\u5efa\u4e00\u4e2a\u5305\u542b<code>ByteArrayEntity<\/code>\u7684<code>BasicHttpResponse<\/code>\u5bf9\u8c61\uff0c\u5e76\u5c06\u5b83\u8fd4\u56de\u7ed9http\u8bf7\u6c42\u3002\u5426\u5219\uff0cHttpClient\u4f1a\u5411\u670d\u52a1\u5668\u91cd\u65b0\u6821\u9a8c\u7f13\u5b58\u3002<\/li><li>\u5982\u679cHttpClient\u7f13\u5b58\u7684\u54cd\u5e94\uff0c\u5411\u670d\u52a1\u5668\u6821\u9a8c\u5931\u8d25\uff0c\u5c31\u4f1a\u5411\u670d\u52a1\u5668\u91cd\u65b0\u8bf7\u6c42\u6570\u636e\uff0c\u5e76\u5c06\u5176\u7f13\u5b58\u8d77\u6765\uff08\u5982\u679c\u5408\u9002\u7684\u8bdd\uff09\u3002<br>\u5f53\u5f00\u542f\u7f13\u5b58\u7684HttpClient\u6536\u5230\u670d\u52a1\u5668\u7684\u54cd\u5e94\u65f6\uff0c\u4f1a\u7ecf\u8fc7\u4e0b\u9762\u7684\u6b65\u9aa4\uff1a<\/li><li>\u68c0\u67e5\u6536\u5230\u7684\u54cd\u5e94\u662f\u5426\u7b26\u5408\u534f\u8bae\u517c\u5bb9\u6027<\/li><li>\u786e\u5b9a\u6536\u5230\u7684\u54cd\u5e94\u662f\u5426\u53ef\u4ee5\u7f13\u5b58<\/li><li>\u5982\u679c\u54cd\u5e94\u662f\u53ef\u4ee5\u7f13\u5b58\u7684\uff0cHttpClient\u5c31\u4f1a\u5c3d\u91cf\u4ece\u54cd\u5e94\u6d88\u606f\u4e2d\u8bfb\u53d6\u6570\u636e\uff08\u5927\u5c0f\u53ef\u4ee5\u5728\u914d\u7f6e\u6587\u4ef6\u8fdb\u884c\u914d\u7f6e\uff09\uff0c\u5e76\u4e14\u7f13\u5b58\u8d77\u6765\u3002<\/li><li>\u5982\u679c\u54cd\u5e94\u6570\u636e\u592a\u5927\uff0c\u7f13\u5b58\u6216\u8005\u91cd\u6784\u6d88\u8017\u7684\u54cd\u5e94\u7a7a\u95f4\u4e0d\u591f\uff0c\u5c31\u4f1a\u76f4\u63a5\u8fd4\u56de\u54cd\u5e94\uff0c\u4e0d\u8fdb\u884c\u7f13\u5b58\u3002<br>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5e26\u6709\u7f13\u5b58\u7684HttpClient\u4e0d\u662fHttpClient\u7684\u53e6\u4e00\u79cd\u5b9e\u73b0\uff0c\u800c\u662f\u901a\u8fc7\u5411http\u8bf7\u6c42\u6267\u884c\u7ba1\u9053\u4e2d\u63d2\u5165\u9644\u52a0\u5904\u7406\u7ec4\u4ef6\u6765\u5b9e\u73b0\u7684\u3002<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">6.2. RFC-2616 Compliance<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u7684\u7f13\u5b58\u673a\u5236\u548cRFC-2626\u6587\u6863\u89c4\u5b9a\u662f\u65e0\u6761\u4ef6\u517c\u5bb9\u7684\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u53ea\u8981\u6307\u5b9a\u4e86<code>MUST<\/code>\uff0c<code>MUST NOT<\/code>\uff0c<code>SHOULD<\/code>\u6216\u8005<code>SHOULD NOT<\/code>\u8fd9\u4e9bHttp\u7f13\u5b58\u89c4\u8303\uff0cHttpClient\u7684\u7f13\u5b58\u5c42\u5c31\u4f1a\u6309\u7167\u6307\u5b9a\u7684\u65b9\u5f0f\u8fdb\u884c\u7f13\u5b58\u3002\u5373\u5f53\u6211\u4eec\u4f7f\u7528HttpClient\u7684\u7f13\u5b58\u673a\u5236\u65f6\uff0cHttpClient\u7684\u7f13\u5b58\u6a21\u5757\u4e0d\u4f1a\u4ea7\u751f\u5f02\u5e38\u52a8\u4f5c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">6.3. \u4f7f\u7528\u8303\u4f8b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u7684\u4f8b\u5b50\u8bb2\u8ff0\u4e86\u5982\u4f55\u521b\u5efa\u4e00\u4e2a\u57fa\u672c\u7684\u5f00\u542f\u7f13\u5b58\u7684HttpClient\u3002\u5e76\u4e14\u914d\u7f6e\u4e86\u6700\u5927\u7f13\u5b581000\u4e2aObject\u5bf9\u8c61\uff0c\u6bcf\u4e2a\u5bf9\u8c61\u6700\u5927\u5360\u75288192\u5b57\u8282\u6570\u636e\u3002\u4ee3\u7801\u4e2d\u51fa\u73b0\u7684\u6570\u636e\uff0c\u53ea\u662f\u4e3a\u4e86\u505a\u6f14\u793a\uff0c\u800c\u8fc7\u4e0d\u662f\u63a8\u8350\u4f7f\u7528\u7684\u914d\u7f6e\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>CacheConfig&nbsp;cacheConfig&nbsp;=&nbsp;CacheConfig.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setMaxCacheEntries(1000)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setMaxObjectSize(8192)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><li>RequestConfig&nbsp;requestConfig&nbsp;=&nbsp;RequestConfig.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setConnectTimeout(30000)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setSocketTimeout(30000)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><li>CloseableHttpClient&nbsp;cachingClient&nbsp;=&nbsp;CachingHttpClients.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setCacheConfig(cacheConfig)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setDefaultRequestConfig(requestConfig)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&nbsp;&nbsp;<\/li><li>HttpCacheContext&nbsp;context&nbsp;=&nbsp;HttpCacheContext.create();&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;http:\/\/www.mydomain.com\/content\/&#8221;);&nbsp;&nbsp;<\/li><li>CloseableHttpResponse&nbsp;response&nbsp;=&nbsp;cachingClient.execute(httpget,&nbsp;context);&nbsp;&nbsp;<\/li><li>try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;CacheResponseStatus&nbsp;responseStatus&nbsp;=&nbsp;context.getCacheResponseStatus();&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;switch&nbsp;(responseStatus)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;case&nbsp;CACHE_HIT:&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(&#8220;A&nbsp;response&nbsp;was&nbsp;generated&nbsp;from&nbsp;the&nbsp;cache&nbsp;with&nbsp;&#8221;&nbsp;+&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&#8220;no&nbsp;requests&nbsp;sent&nbsp;upstream&#8221;);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;break;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;case&nbsp;CACHE_MODULE_RESPONSE:&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(&#8220;The&nbsp;response&nbsp;was&nbsp;generated&nbsp;directly&nbsp;by&nbsp;the&nbsp;&#8221;&nbsp;+&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&#8220;caching&nbsp;module&#8221;);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;break;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;case&nbsp;CACHE_MISS:&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(&#8220;The&nbsp;response&nbsp;came&nbsp;from&nbsp;an&nbsp;upstream&nbsp;server&#8221;);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;break;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;case&nbsp;VALIDATED:&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(&#8220;The&nbsp;response&nbsp;was&nbsp;generated&nbsp;from&nbsp;the&nbsp;cache&nbsp;&#8221;&nbsp;+&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&#8220;after&nbsp;validating&nbsp;the&nbsp;entry&nbsp;with&nbsp;the&nbsp;origin&nbsp;server&#8221;);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;break;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;response.close();&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">6.4. \u914d\u7f6e<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6709\u7f13\u5b58\u7684HttpClient\u7ee7\u627f\u4e86\u975e\u7f13\u5b58HttpClient\u7684\u6240\u6709\u914d\u7f6e\u9879\u548c\u53c2\u6570\uff08\u5305\u62ec\u8d85\u65f6\u65f6\u95f4\uff0c\u8fde\u63a5\u6c60\u5927\u5c0f\u7b49\u914d\u7f6e\u9879\uff09\u3002\u5982\u679c\u9700\u8981\u5bf9\u7f13\u5b58\u8fdb\u884c\u5177\u4f53\u914d\u7f6e\uff0c\u53ef\u4ee5\u521d\u59cb\u5316\u4e00\u4e2a<code>CacheConfig<\/code>\u5bf9\u8c61\u6765\u81ea\u5b9a\u4e49\u4e0b\u9762\u7684\u53c2\u6570\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><code>Cache size<\/code>\uff08\u7f13\u5b58\u5927\u5c0f\uff09. \u5982\u679c\u540e\u53f0\u5b58\u50a8\u652f\u6301\uff0c\u6211\u4eec\u53ef\u4ee5\u6307\u5b9a\u7f13\u5b58\u7684\u6700\u5927\u6761\u6570\uff0c\u548c\u6bcf\u4e2a\u7f13\u5b58\u4e2d\u5b58\u50a8\u7684response\u7684\u6700\u5927size\u3002<\/li><li><code>Public\/private cacheing<\/code>(\u516c\u7528\/\u79c1\u6709 \u7f13\u5b58\uff09. \u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u7f13\u5b58\u6a21\u5757\u4f1a\u628a\u7f13\u5b58\u5f53\u505a\u516c\u7528\u7684\u7f13\u5b58\uff0c\u6240\u4ee5\u7f13\u5b58\u673a\u5236\u4e0d\u4f1a\u7f13\u5b58\u5e26\u6709\u6388\u6743\u5934\u6d88\u606f\u6216\u8005\u6307\u5b9a<code>Cache-Control:private<\/code>\u7684\u54cd\u5e94\u3002\u4f46\u662f\u5982\u679c\u7f13\u5b58\u53ea\u4f1a\u88ab\u4e00\u4e2a\u903b\u8f91\u4e0a\u7684\u7528\u6237\u4f7f\u7528\uff08\u548c\u6d4f\u89c8\u5668\u997f\u7f13\u5b58\u7c7b\u4f3c\uff09\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u5173\u95ed\u7f13\u5b58\u5171\u4eab\u673a\u5236\u3002<\/li><li><code>Heuristic caching<\/code>\uff08\u542f\u53d1\u5f0f\u7f13\u5b58\uff09\u3002\u5373\u4f7f\u670d\u52a1\u5668\u6ca1\u6709\u660e\u786e\u8bbe\u7f6e\u7f13\u5b58\u63a7\u5236headers\u4fe1\u606f\uff0c\u6bcf\u4e2aRFC2616\u7f13\u5b58\u4e5f\u4f1a\u5b58\u50a8\u4e00\u5b9a\u6570\u76ee\u7684\u7f13\u5b58\u3002\u8fd9\u4e2a\u7279\u5f81\u5728HttpClient\u4e2d\u9ed8\u8ba4\u662f\u5173\u95ed\u7684\uff0c\u5982\u679c\u670d\u52a1\u5668\u4e0d\u8bbe\u7f6e\u63a7\u5236\u7f13\u5b58\u7684header\u4fe1\u606f\uff0c\u4f46\u662f\u6211\u4eec\u4ecd\u7136\u5e0c\u671b\u5bf9\u54cd\u5e94\u8fdb\u884c\u7f13\u5b58\uff0c\u5c31\u9700\u8981\u5728HttpClient\u4e2d\u6253\u5f00\u8fd9\u4e2a\u529f\u80fd\u3002\u6fc0\u6d3b\u542f\u53d1\u5f0f\u7f13\u5b58\uff0c\u7136\u540e\u4f7f\u7528\u9ed8\u8ba4\u7684\u5237\u65b0\u65f6\u95f4\u6216\u8005\u81ea\u5b9a\u4e49\u5237\u65b0\u65f6\u95f4\u3002\u66f4\u591a\u542f\u53d1\u5f0f\u7f13\u5b58\u7684\u4fe1\u606f\uff0c\u53ef\u4ee5\u53c2\u8003Http\/1.1 RFC\u6587\u6863\u768413.2.2\u5c0f\u8282\uff0c13.2.4\u5c0f\u8282\u3002<\/li><li><code>Background validation<\/code>(\u540e\u53f0\u6821\u9a8c\uff09\u3002HttpClient\u7684\u7f13\u5b58\u673a\u5236\u652f\u6301RFC5861\u7684<code>stale-while-revalidate<\/code>\u6307\u4ee4\uff0c\u5b83\u5141\u8bb8\u4e00\u5b9a\u6570\u76ee\u7684\u7f13\u5b58\u5728\u540e\u53f0\u6821\u9a8c\u662f\u5426\u8fc7\u671f\u3002\u6211\u4eec\u53ef\u80fd\u9700\u8981\u8c03\u6574\u53ef\u4ee5\u5728\u540e\u53f0\u5de5\u4f5c\u7684\u6700\u5927\u548c\u6700\u5c0f\u7684\u7ebf\u7a0b\u6570\uff0c\u4ee5\u53ca\u8bbe\u7f6e\u7ebf\u7a0b\u5728\u56de\u6536\u524d\u6700\u5927\u7684\u7a7a\u95f2\u65f6\u95f4\u3002\u5f53\u6ca1\u6709\u8db3\u591f\u7ebf\u7a0b\u6765\u6821\u9a8c\u7f13\u5b58\u662f\u5426\u8fc7\u671f\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u6307\u5b9a\u6392\u961f\u961f\u5217\u7684\u5927\u5c0f\u3002<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">6.5.\u5b58\u50a8\u4ecb\u8d28<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u9ed8\u8ba4\uff0cHttpClient\u7f13\u5b58\u673a\u5236\u5c06\u7f13\u5b58\u6761\u76ee\u548c\u7f13\u5b58\u7684response\u653e\u5728\u672c\u5730\u7a0b\u5e8f\u7684jvm\u5185\u5b58\u4e2d\u3002\u8fd9\u6837\u867d\u7136\u63d0\u4f9b\u9ad8\u6027\u80fd\uff0c\u4f46\u662f\u5f53\u6211\u4eec\u7684\u7a0b\u5e8f\u5185\u5b58\u6709\u5927\u5c0f\u9650\u5236\u7684\u65f6\u5019\uff0c\u8fd9\u5c31\u4f1a\u53d8\u5f97\u4e0d\u592a\u5408\u7406\u3002\u56e0\u4e3a\u7f13\u5b58\u7684\u751f\u547d\u4e2d\u671f\u5f88\u77ed\uff0c\u5982\u679c\u7a0b\u5e8f\u91cd\u542f\uff0c\u7f13\u5b58\u5c31\u4f1a\u5931\u6548\u3002\u5f53\u524d\u7248\u672c\u7684HttpClient\u4f7f\u7528EhCache\u548cmemchached\u6765\u5b58\u50a8\u7f13\u5b58\uff0c\u8fd9\u6837\u5c31\u652f\u6301\u5c06\u7f13\u5b58\u653e\u5230\u672c\u5730\u78c1\u76d8\u6216\u8005\u5176\u4ed6\u5b58\u50a8\u4ecb\u8d28\u4e0a\u3002\u5982\u679c\u5185\u5b58\u3001\u672c\u5730\u78c1\u76d8\u3001\u5916\u5730\u78c1\u76d8\uff0c\u90fd\u4e0d\u9002\u5408\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\uff0cHttpClient\u4e5f\u652f\u6301\u81ea\u5b9a\u4e49\u5b58\u50a8\u4ecb\u8d28\uff0c\u53ea\u9700\u8981\u5b9e\u73b0<code>HttpCacheStorage<\/code>\u63a5\u53e3\uff0c\u7136\u540e\u5728\u521b\u5efaHttpClient\u65f6\uff0c\u4f7f\u7528\u8fd9\u4e2a\u63a5\u53e3\u7684\u914d\u7f6e\u3002\u8fd9\u79cd\u60c5\u51b5\uff0c\u7f13\u5b58\u4f1a\u5b58\u50a8\u5728\u81ea\u5b9a\u4e49\u7684\u4ecb\u8d28\u4e2d\uff0c\u4f46\u662fyou will get to reuse all of the logic surrounding HTTP\/1.1 compliance and cache handling. \u4e00\u822c\u6765\u8bf4\uff0c\u53ef\u4ee5\u521b\u5efa\u51fa\u652f\u6301\u4efb\u4f55\u952e\u503c\u5bf9\u6307\u5b9a\u5b58\u50a8\uff08\u7c7b\u4f3cJava Map\u63a5\u53e3\uff09\u7684<code>HttpCacheStorage<\/code>\uff0c\u7528\u4e8e\u8fdb\u884c\u539f\u5b50\u66f4\u65b0\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u540e\uff0c\u901a\u8fc7\u4e00\u4e9b\u989d\u5916\u7684\u5de5\u4f5c\uff0c\u8fd8\u53ef\u4ee5\u5efa\u7acb\u8d77\u591a\u5c42\u6b21\u7684\u7f13\u5b58\u7ed3\u6784;\u78c1\u76d8\u4e2d\u7684\u7f13\u5b58\uff0c\u8fdc\u7a0bmemcached\u4e2d\u7684\u7f13\u5b58\uff0c\u865a\u62df\u5185\u5b58\u4e2d\u7684\u7f13\u5b58\uff0cL1\/L2\u5904\u7406\u5668\u4e2d\u7684\u7f13\u5b58\u7b49\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u7b2c\u4e03\u7ae0 &nbsp;\u9ad8\u7ea7\u4e3b\u9898<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">7.1 \u81ea\u5b9a\u4e49\u5ba2\u6237\u7aef\u8fde\u63a5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u7279\u5b9a\u6761\u4ef6\u4e0b\uff0c\u4e5f\u8bb8\u9700\u8981\u6765\u5b9a\u5236HTTP\u62a5\u6587\u901a\u8fc7\u7ebf\u8def\u4f20\u9012\uff0c\u8d8a\u8fc7\u4e86\u53ef\u80fd\u4f7f\u7528\u7684HTTP\u53c2\u6570\u6765\u5904\u7406\u975e\u6807\u51c6\u4e0d\u517c\u5bb9\u884c\u4e3a\u7684\u65b9\u5f0f\u3002\u6bd4\u5982\uff0c\u5bf9\u4e8eWeb\u722c\u866b\uff0c\u5b83\u53ef\u80fd\u9700\u8981\u5f3a\u5236HttpClient\u63a5\u53d7\u683c\u5f0f\u9519\u8bef\u7684\u54cd\u5e94\u5934\u90e8\u4fe1\u606f\uff0c\u6765\u62a2\u6551\u62a5\u6587\u7684\u5185\u5bb9\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u5e38\u63d2\u5165\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684\u62a5\u6587\u89e3\u6790\u5668\u7684\u8fc7\u7a0b\u6216\u5b9a\u5236\u8fde\u63a5\u5b9e\u73b0\u9700\u8981\u51e0\u4e2a\u6b65\u9aa4\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u63d0\u4f9b\u4e00\u4e2a\u81ea\u5b9a\u4e49LineParser\/LineFormatter\u63a5\u53e3\u5b9e\u73b0\u3002\u5982\u679c\u9700\u8981\uff0c\u5b9e\u73b0\u62a5\u6587\u89e3\u6790\/\u683c\u5f0f\u5316\u903b\u8f91\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>&lt;span&nbsp;style=&#8221;font-family:SimSun;&#8221;&gt;class&nbsp;MyLineParser&nbsp;extends&nbsp;BasicLineParser&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;@Override&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;Header&nbsp;parseHeader(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CharArrayBuffer&nbsp;buffer)&nbsp;throws&nbsp;ParseException&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;super.parseHeader(buffer);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;catch&nbsp;(ParseException&nbsp;ex)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;Suppress&nbsp;ParseException&nbsp;exception&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;new&nbsp;BasicHeader(buffer.toString(),&nbsp;null);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>}&lt;\/span&gt;&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><br>\u63d0\u8fc7\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684&nbsp;HttpConnectionFactory&nbsp;\u5b9e\u73b0\u3002\u66ff\u6362\u9700\u8981\u81ea\u5b9a\u4e49\u7684\u9ed8\u8ba4\u8bf7\u6c42\/\u54cd\u5e94\u89e3\u6790\u5668\uff0c\u8bf7\u6c42\/\u54cd\u5e94\u683c\u5f0f\u5316\u5668\u3002\u5982\u679c\u9700\u8981\uff0c\u5b9e\u73b0\u4e0d\u540c\u7684\u62a5\u6587\u5199\u5165\/\u8bfb\u53d6\u4ee3\u7801\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>&lt;span&nbsp;style=&#8221;font-family:SimSun;&#8221;&gt;HttpConnectionFactory&lt;HttpRoute,&nbsp;ManagedHttpClientConnection&gt;&nbsp;connFactory&nbsp;=&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;ManagedHttpClientConnectionFactory(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;DefaultHttpRequestWriterFactory(),&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;DefaultHttpResponseParserFactory(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;MyLineParser(),&nbsp;new&nbsp;DefaultHttpResponseFactory()));&lt;\/span&gt;&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><br>\u4e3a\u4e86\u521b\u5efa\u65b0\u7c7b\u7684\u8fde\u63a5\uff0c\u63d0\u4f9b\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684ClientConnectionOperator\u63a5\u53e3\u5b9e\u73b0\u3002\u5982\u679c\u9700\u8981\uff0c\u5b9e\u73b0\u4e0d\u540c\u7684\u5957\u63a5\u5b57\u521d\u59cb\u5316\u4ee3\u7801\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>&lt;span&nbsp;style=&#8221;font-family:SimSun;&#8221;&gt;PoolingHttpClientConnectionManager&nbsp;cm&nbsp;=&nbsp;new&nbsp;PoolingHttpClientConnectionManager(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;connFactory);&nbsp;&nbsp;<\/li><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setConnectionManager(cm)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&lt;\/span&gt;&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">7.2 \u6709\u72b6\u6001\u7684HTTP\u8fde\u63a5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HTTP\u89c4\u8303\u5047\u8bbesession\u72b6\u6001\u4fe1\u606f\u901a\u5e38\u662f\u4ee5HTTP cookie\u683c\u5f0f\u5d4c\u5165\u5728HTTP\u62a5\u6587\u4e2d\u7684\uff0c\u56e0\u6b64HTTP\u8fde\u63a5\u901a\u5e38\u662f\u65e0\u72b6\u6001\u7684\uff0c\u8fd9\u4e2a\u5047\u8bbe\u5728\u73b0\u5b9e\u751f\u6d3b\u4e2d\u901a\u5e38\u662f\u4e0d\u5bf9\u7684\u3002\u4e5f\u6709\u4e00\u4e9b\u60c5\u51b5\uff0c\u5f53HTTP\u8fde\u63a5\u4f7f\u7528\u7279\u5b9a\u7684\u7528\u6237\u6807\u8bc6\u6216\u7279\u5b9a\u7684\u5b89\u5168\u4e0a\u4e0b\u6587\u6765\u521b\u5efa\u65f6\uff0c\u56e0\u6b64\u4e0d\u80fd\u548c\u5176\u5b83\u7528\u6237\u5171\u4eab\uff0c\u53ea\u80fd\u7531\u8be5\u7528\u6237\u91cd\u7528\u3002\u8fd9\u6837\u7684\u6709\u72b6\u6001\u7684HTTP\u8fde\u63a5\u7684\u793a\u4f8b\u5c31\u662fNTLM\u8ba4\u8bc1\u8fde\u63a5\u548c\u4f7f\u7528\u5ba2\u6237\u7aef\u8bc1\u4e66\u8ba4\u8bc1\u7684SSL\u8fde\u63a5\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">&nbsp;<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">7.2.1 \u7528\u6237\u4ee4\u724c\u5904\u7406\u5668<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">HttpClient\u4f9d\u8d56UserTokenHandler\u63a5\u53e3\u6765\u51b3\u5b9a\u7ed9\u5b9a\u7684\u6267\u884c\u4e0a\u4e0b\u6587\u662f\u5426\u662f\u7528\u6237\u6307\u5b9a\u7684\u3002\u5982\u679c\u8fd9\u4e2a\u4e0a\u4e0b\u6587\u662f\u7528\u6237\u6307\u5b9a\u7684\u6216\u8005\u5982\u679c\u4e0a\u4e0b\u6587\u6ca1\u6709\u5305\u542b\u4efb\u4f55\u8d44\u6e90\u6216\u5173\u4e8e\u5f53\u524d\u7528\u6237\u6307\u5b9a\u8be6\u60c5\u800c\u662fnull\uff0c\u4ee4\u724c\u5bf9\u8c61\u7531\u8fd9\u4e2a\u5904\u7406\u5668\u8fd4\u56de\uff0c\u671f\u671b\u552f\u4e00\u5730\u6807\u8bc6\u5f53\u524d\u7684\u7528\u6237\u3002\u7528\u6237\u4ee4\u724c\u5c06\u88ab\u7528\u6765\u4fdd\u8bc1\u7528\u6237\u6307\u5b9a\u8d44\u6e90\u4e0d\u4f1a\u548c\u5176\u5b83\u7528\u6237\u6765\u5171\u4eab\u6216\u91cd\u7528\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u5b83\u53ef\u4ee5\u4ece\u7ed9\u5b9a\u7684\u6267\u884c\u4e0a\u4e0b\u6587\u4e2d\u6765\u83b7\u5f97\uff0cUserTokenHandler\u63a5\u53e3\u7684\u9ed8\u8ba4\u5b9e\u73b0\u662f\u4f7f\u7528\u4e3b\u7c7b\u7684\u4e00\u4e2a\u5b9e\u4f8b\u6765\u4ee3\u8868HTTP\u8fde\u63a5\u7684\u72b6\u6001\u5bf9\u8c61\u3002UserTokenHandler\u5c06\u4f1a\u4f7f\u7528\u57fa\u4e8e\u5982NTLM\u6216\u5f00\u542f\u7684\u5ba2\u6237\u7aef\u8ba4\u8bc1SSL\u4f1a\u8bdd\u8ba4\u8bc1\u6a21\u5f0f\u7684\u7528\u6237\u7684\u4e3b\u8fde\u63a5\u3002\u5982\u679c\u4e8c\u8005\u90fd\u4e0d\u53ef\u7528\uff0c\u90a3\u4e48\u5c31\u4e0d\u4f1a\u8fd4\u56de\u4ee4\u724c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u9ed8\u8ba4\u7684\u4e0d\u80fd\u6ee1\u8db3\u5b83\u4eec\u7684\u9700\u8981\uff0c\u7528\u6237\u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684\u5b9e\u73b0\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>&lt;span&nbsp;style=&#8221;font-family:SimSun;&#8221;&gt;CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.createDefault();&nbsp;&nbsp;<\/li><li>HttpClientContext&nbsp;context&nbsp;=&nbsp;HttpClientContext.create();&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;http:\/\/localhost:8080\/&#8221;);&nbsp;&nbsp;<\/li><li>CloseableHttpResponse&nbsp;response&nbsp;=&nbsp;httpclient.execute(httpget,&nbsp;context);&nbsp;&nbsp;<\/li><li>try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;Principal&nbsp;principal&nbsp;=&nbsp;context.getUserToken(Principal.class);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(principal);&nbsp;&nbsp;<\/li><li>}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;response.close();&nbsp;&nbsp;<\/li><li>}&lt;\/span&gt;&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u9ed8\u8ba4\u7684\u4e0d\u80fd\u6ee1\u8db3\u9700\u6c42\uff0c\u7528\u6237\u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e2a\u7279\u5b9a\u7684\u5b9e\u73b0\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>&lt;span&nbsp;style=&#8221;font-family:SimSun;&#8221;&gt;UserTokenHandler&nbsp;userTokenHandler&nbsp;=&nbsp;new&nbsp;UserTokenHandler()&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;Object&nbsp;getUserToken(HttpContext&nbsp;context)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;context.getAttribute(&#8220;my-token&#8221;);&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>};&nbsp;&nbsp;<\/li><li>CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.custom()&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.setUserTokenHandler(userTokenHandler)&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.build();&lt;\/span&gt;&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">7.2.2 \u6301\u4e45\u5316\u6709\u72b6\u6001\u7684\u8fde\u63a5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bf7\u6ce8\u610f\u5e26\u6709\u72b6\u6001\u5bf9\u8c61\u7684\u6301\u4e45\u5316\u8fde\u63a5\u4ec5\u5f53\u8bf7\u6c42\u88ab\u6267\u884c\u65f6\uff0c\u76f8\u540c\u72b6\u6001\u5bf9\u8c61\u88ab\u7ed1\u5b9a\u5230\u6267\u884c\u4e0a\u4e0b\u6587\u65f6\u53ef\u4ee5\u88ab\u91cd\u7528\u3002\u6240\u4ee5\uff0c\u4fdd\u8bc1\u76f8\u540c\u4e0a\u4e0b\u6587\u91cd\u7528\u4e8e\u6267\u884c\u968f\u540e\u7684\u76f8\u540c\u7528\u6237\uff0c\u6216\u7528\u6237\u4ee4\u724c\u7ed1\u5b9a\u5230\u4e4b\u524d\u8bf7\u6c42\u6267\u884c\u4e0a\u4e0b\u6587\u7684HTTP\u8bf7\u6c42\u662f\u5f88\u91cd\u8981\u7684\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>&lt;span&nbsp;style=&#8221;font-family:SimSun;&#8221;&gt;CloseableHttpClient&nbsp;httpclient&nbsp;=&nbsp;HttpClients.createDefault();&nbsp;&nbsp;<\/li><li>HttpClientContext&nbsp;context1&nbsp;=&nbsp;HttpClientContext.create();&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget1&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;http:\/\/localhost:8080\/&#8221;);&nbsp;&nbsp;<\/li><li>CloseableHttpResponse&nbsp;response1&nbsp;=&nbsp;httpclient.execute(httpget1,&nbsp;context1);&nbsp;&nbsp;<\/li><li>try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;HttpEntity&nbsp;entity1&nbsp;=&nbsp;response1.getEntity();&nbsp;&nbsp;<\/li><li>}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;response1.close();&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><li>Principal&nbsp;principal&nbsp;=&nbsp;context1.getUserToken(Principal.class);&nbsp;&nbsp;<\/li><li>HttpClientContext&nbsp;context2&nbsp;=&nbsp;HttpClientContext.create();&nbsp;&nbsp;<\/li><li>context2.setUserToken(principal);&nbsp;&nbsp;<\/li><li>HttpGet&nbsp;httpget2&nbsp;=&nbsp;new&nbsp;HttpGet(&#8220;http:\/\/localhost:8080\/&#8221;);&nbsp;&nbsp;<\/li><li>CloseableHttpResponse&nbsp;response2&nbsp;=&nbsp;httpclient.execute(httpget2,&nbsp;context2);&nbsp;&nbsp;<\/li><li>try&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;HttpEntity&nbsp;entity2&nbsp;=&nbsp;response2.getEntity();&nbsp;&nbsp;<\/li><li>}&nbsp;finally&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;response2.close();&nbsp;&nbsp;<\/li><li>}&lt;\/span&gt;&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">7.3.&nbsp;\u4f7f\u7528FutureRequestExecutionService<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u4f7f\u7528FutureRequestExecutionService\uff0c\u4f60\u53ef\u4ee5\u8c03\u5ea6HTTP\u8c03\u7528\u4ee5\u53ca\u628aresponse\u5f53\u4f5c\u4e00\u4e2aFuture\u3002\u8fd9\u662f\u975e\u5e38\u6709\u7528\u7684\uff0c\u6bd4\u5982\u5f53\u591a\u6b21\u8c03\u7528\u4e00\u4e2aWeb\u670d\u52a1\u3002\u4f7f\u7528FutureRequestExecutionService\u7684\u4f18\u52bf\u5728\u4e8e\u60a8\u53ef\u4ee5\u4f7f\u7528\u591a\u4e2a\u7ebf\u7a0b\u6765\u8c03\u5ea6\u8bf7\u6c42\u540c\u65f6\uff0c\u5bf9\u4efb\u52a1\u8bbe\u7f6e\u8d85\u65f6\u6216\u53d6\u6d88\uff0c\u5f53response\u4e0d\u518d\u9700\u8981\u7684\u65f6\u5019\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">FutureRequestExecutionService\u7528HttpRequestFutureTask\uff08\u7ee7\u627fFutureTask\uff09\u5305\u88c5request\u3002\u8fd9\u4e2a\u7c7b\u5141\u8bb8\u4f60\u53d6\u6d88Task\u4ee5\u53ca\u4fdd\u6301\u8ddf\u8e2a\u5404\u9879\u6307\u6807\uff0c\u5982request duration\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">7.3.1.&nbsp;\u6784\u9020FutureRequestExecutionService<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">futureRequestExecutionService\u7684\u6784\u9020\u65b9\u6cd5\u5305\u62ec\u4e24\u4e2a\u53c2\u6570\uff1ahttpClient\u5b9e\u4f8b\u548cExecutorService\u5b9e\u4f8b\u3002\u5f53\u914d\u7f6e\u4e24\u4e2a\u53c2\u6570\u7684\u65f6\u5019\uff0c\u60a8\u8981\u4f7f\u7528\u7684\u7ebf\u7a0b\u6570\u7b49\u4e8e\u6700\u5927\u8fde\u63a5\u6570\u662f\u5f88\u91cd\u8981\u7684\u3002\u5f53\u7ebf\u7a0b\u6bd4\u8fde\u63a5\u591a\u7684\u65f6\u5019\uff0c\u8fde\u63a5\u53ef\u80fd\u4f1a\u5f00\u59cb\u8d85\u65f6\uff0c\u56e0\u4e3a\u6ca1\u6709\u53ef\u7528\u7684\u8fde\u63a5\u3002\u5f53\u8fde\u63a5\u591a\u4e8e\u7ebf\u7a0b\u65f6\uff0cfutureRequestExecutionService\u4e0d\u4f1a\u4f7f\u7528\u6240\u6709\u7684\u8fde\u63a5\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>&lt;span&nbsp;style=&#8221;font-family:SimSun;&#8221;&gt;HttpClient&nbsp;httpClient&nbsp;=&nbsp;HttpClientBuilder.create().setMaxConnPerRoute(5).build();&nbsp;&nbsp;<\/li><li>ExecutorService&nbsp;executorService&nbsp;=&nbsp;Executors.newFixedThreadPool(5);&nbsp;&nbsp;<\/li><li>FutureRequestExecutionService&nbsp;futureRequestExecutionService&nbsp;=&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;FutureRequestExecutionService(httpClient,&nbsp;executorService);&lt;\/span&gt;&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">7.3.2. \u5b89\u6392requests<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8981\u5b89\u6392\u4e00\u4e2a\u8bf7\u6c42\uff0c\u53ea\u9700\u63d0\u4f9b\u4e00\u4e2aHttpUriRequest\uff0cHttpContext\u548cResponseHandler\u3002\u56e0\u4e3arequest\u662f\u7531executor service\u5904\u7406\u7684\uff0c\u800cResponseHandler\u7684\u662f\u5f3a\u5236\u6027\u7684\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>&lt;span&nbsp;style=&#8221;font-family:SimSun;&#8221;&gt;private&nbsp;final&nbsp;class&nbsp;OkidokiHandler&nbsp;implements&nbsp;ResponseHandler&lt;Boolean&gt;&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;Boolean&nbsp;handleResponse(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;final&nbsp;HttpResponse&nbsp;response)&nbsp;throws&nbsp;ClientProtocolException,&nbsp;IOException&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;response.getStatusLine().getStatusCode()&nbsp;==&nbsp;200;&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><li>HttpRequestFutureTask&lt;Boolean&gt;&nbsp;task&nbsp;=&nbsp;futureRequestExecutionService.execute(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;HttpGet(&#8220;http:\/\/www.google.com&#8221;),&nbsp;HttpClientContext.create(),&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;OkidokiHandler());&nbsp;&nbsp;<\/li><li>\/\/&nbsp;blocks&nbsp;until&nbsp;the&nbsp;request&nbsp;complete&nbsp;and&nbsp;then&nbsp;returns&nbsp;true&nbsp;if&nbsp;you&nbsp;can&nbsp;connect&nbsp;to&nbsp;Google&nbsp;&nbsp;<\/li><li>boolean&nbsp;ok=task.get();&lt;\/span&gt;&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">7.3.3. \u53d6\u6d88tasks<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u9884\u5b9a\u7684\u4efb\u52a1\u53ef\u80fd\u4f1a\u88ab\u53d6\u6d88\u3002\u5982\u679c\u4efb\u52a1\u5c1a\u672a\u6267\u884c\uff0c\u4f46\u4ec5\u4ec5\u662f\u6392\u961f\u7b49\u5f85\u6267\u884c\uff0c\u5b83\u6839\u672c\u5c31\u4e0d\u4f1a\u6267\u884c\u3002\u5982\u679c\u4efb\u52a1\u5728\u6267\u884c\u4e2d\u4e14mayInterruptIfRunning\u53c2\u6570\u88ab\u8bbe\u7f6e\u4e3atrue\uff0c\u8bf7\u6c42\u4e2d\u7684abort\uff08\uff09\u51fd\u6570\u5c06\u88ab\u8c03\u7528;\u5426\u5219response\u4f1a\u7b80\u5355\u5730\u5ffd\u7565\uff0c\u4f46\u8be5\u8bf7\u6c42\u5c06\u88ab\u5141\u8bb8\u6b63\u5e38\u5b8c\u6210\u3002\u4efb\u4f55\u540e\u7eed\u8c03\u7528task.get()\u4f1a\u4ea7\u751f\u4e00\u4e2aIllegalStateException\u3002\u5e94\u5f53\u6ce8\u610f\u5230\uff0c\u53d6\u6d88\u4efb\u52a1\u4ec5\u53ef\u4ee5\u91ca\u653e\u5ba2\u6237\u7aef\u7684\u8d44\u6e90\u3002\u8be5\u8bf7\u6c42\u53ef\u80fd\u5b9e\u9645\u4e0a\u662f\u5728\u670d\u52a1\u5668\u7aef\u6b63\u5e38\u5904\u7406\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>&lt;span&nbsp;style=&#8221;font-family:SimSun;&#8221;&gt;task.cancel(true)&nbsp;&nbsp;<\/li><li>task.get()&nbsp;\/\/&nbsp;throws&nbsp;an&nbsp;Exception&lt;\/span&gt;&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">7.3.4.&nbsp;\u56de\u8c03<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0d\u7528\u624b\u52a8\u8c03\u7528task.get()\uff0c\u60a8\u4e5f\u53ef\u4ee5\u5728\u8bf7\u6c42\u5b8c\u6210\u65f6\u4f7f\u7528FutureCallback\u5b9e\u4f8b\u83b7\u53d6\u56de\u8c03\u3002\u8fd9\u91cc\u91c7\u7528\u7684\u662f\u548cHttpAsyncClient\u76f8\u540c\u7684\u63a5\u53e3<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>&lt;span&nbsp;style=&#8221;font-family:SimSun;&#8221;&gt;private&nbsp;final&nbsp;class&nbsp;MyCallback&nbsp;implements&nbsp;FutureCallback&lt;Boolean&gt;&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;void&nbsp;failed(final&nbsp;Exception&nbsp;ex)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;do&nbsp;something&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;void&nbsp;completed(final&nbsp;Boolean&nbsp;result)&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;do&nbsp;something&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;void&nbsp;cancelled()&nbsp;{&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;do&nbsp;something&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;<\/li><li>}&nbsp;&nbsp;<\/li><li>HttpRequestFutureTask&lt;Boolean&gt;&nbsp;task&nbsp;=&nbsp;futureRequestExecutionService.execute(&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;HttpGet(&#8220;http:\/\/www.google.com&#8221;),&nbsp;HttpClientContext.create(),&nbsp;&nbsp;<\/li><li>&nbsp;&nbsp;&nbsp;&nbsp;new&nbsp;OkidokiHandler(),&nbsp;new&nbsp;MyCallback());&lt;\/span&gt;&nbsp;&nbsp;<\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">7.3.5.&nbsp;\u6307\u6807<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">FutureRequestExecutionService\u901a\u5e38\u7528\u4e8e\u5927\u91cfWeb\u670d\u52a1\u8c03\u7528\u7684\u5e94\u7528\u7a0b\u5e8f\u4e4b\u4e2d\u3002\u4e3a\u4e86\u4fbf\u4e8e\u4f8b\u5982\u76d1\u89c6\u6216\u914d\u7f6e\u8c03\u6574\uff0cFutureRequestExecutionService\u8ddf\u8e2a\u4e86\u51e0\u4e2a\u6307\u6807\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HttpRequestFutureTask\u4f1a\u63d0\u4f9b\u4e00\u4e9b\u65b9\u6cd5\u6765\u83b7\u5f97\u4efb\u52a1\u65f6\u95f4\uff1a\u4ece\u88ab\u5b89\u6392\uff0c\u5f00\u59cb\uff0c\u76f4\u5230\u7ed3\u675f\u3002\u6b64\u5916\uff0c\u8bf7\u6c42\u548c\u4efb\u52a1\u6301\u7eed\u65f6\u95f4\u4e5f\u662f\u53ef\u7528\u7684\u3002\u8fd9\u4e9b\u6307\u6807\u90fd\u805a\u96c6\u5728FutureRequestExecutionService\u4e2d\u7684FutureRequestExecutionMetrics\u5b9e\u4f8b\uff0c\u53ef\u4ee5\u901a\u8fc7FutureRequestExecutionService.metrics()\u83b7\u53d6\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>&lt;span&nbsp;style=&#8221;font-family:SimSun;&#8221;&gt;task.scheduledTime()&nbsp;\/\/&nbsp;returns&nbsp;the&nbsp;timestamp&nbsp;the&nbsp;task&nbsp;was&nbsp;scheduled&nbsp;&nbsp;<\/li><li>task.startedTime()&nbsp;\/\/&nbsp;returns&nbsp;the&nbsp;timestamp&nbsp;when&nbsp;the&nbsp;task&nbsp;was&nbsp;started&nbsp;&nbsp;<\/li><li>task.endedTime()&nbsp;\/\/&nbsp;returns&nbsp;the&nbsp;timestamp&nbsp;when&nbsp;the&nbsp;task&nbsp;was&nbsp;done&nbsp;executing&nbsp;&nbsp;<\/li><li>task.requestDuration&nbsp;\/\/&nbsp;returns&nbsp;the&nbsp;duration&nbsp;of&nbsp;the&nbsp;http&nbsp;request&nbsp;&nbsp;<\/li><li>task.taskDuration&nbsp;\/\/&nbsp;returns&nbsp;the&nbsp;duration&nbsp;of&nbsp;the&nbsp;task&nbsp;from&nbsp;the&nbsp;moment&nbsp;it&nbsp;was&nbsp;scheduled&nbsp;&nbsp;<\/li><li>FutureRequestExecutionMetrics&nbsp;metrics&nbsp;=&nbsp;futureRequestExecutionService.metrics()&nbsp;&nbsp;<\/li><li>metrics.getActiveConnectionCount()&nbsp;\/\/&nbsp;currently&nbsp;active&nbsp;connections&nbsp;&nbsp;<\/li><li>metrics.getScheduledConnectionCount();&nbsp;\/\/&nbsp;currently&nbsp;scheduled&nbsp;connections&nbsp;&nbsp;<\/li><li>metrics.getSuccessfulConnectionCount();&nbsp;\/\/&nbsp;total&nbsp;number&nbsp;of&nbsp;successful&nbsp;requests&nbsp;&nbsp;<\/li><li>metrics.getSuccessfulConnectionAverageDuration();&nbsp;\/\/&nbsp;average&nbsp;request&nbsp;duration&nbsp;&nbsp;<\/li><li>metrics.getFailedConnectionCount();&nbsp;\/\/&nbsp;total&nbsp;number&nbsp;of&nbsp;failed&nbsp;tasks&nbsp;&nbsp;<\/li><li>metrics.getFailedConnectionAverageDuration();&nbsp;\/\/&nbsp;average&nbsp;duration&nbsp;of&nbsp;failed&nbsp;tasks&nbsp;&nbsp;<\/li><li>metrics.getTaskCount();&nbsp;\/\/&nbsp;total&nbsp;number&nbsp;of&nbsp;tasks&nbsp;scheduled&nbsp;&nbsp;<\/li><li>metrics.getRequestCount();&nbsp;\/\/&nbsp;total&nbsp;number&nbsp;of&nbsp;requests&nbsp;&nbsp;<\/li><li>metrics.getRequestAverageDuration();&nbsp;\/\/&nbsp;average&nbsp;request&nbsp;duration&nbsp;&nbsp;<\/li><li>metrics.getTaskAverageDuration();&nbsp;\/\/&nbsp;average&nbsp;task&nbsp;duration&lt;\/span&gt;&nbsp;<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u8f6c\u8f7d\u81ea\uff1ahttps:\/\/blog.csdn.net\/weixin_33832340\/article\/details\/92004440<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Http\u534f\u8bae\u5e94\u8be5\u662f\u4e92\u8054\u7f51\u4e2d\u6700\u91cd\u8981\u7684\u534f\u8bae\u3002\u6301\u7eed\u589e\u957f\u7684web\u670d\u52a1\u3001\u53ef\u8054\u7f51\u7684\u5bb6\u7528\u7535\u5668\u7b49\u90fd\u5728\u7ee7\u627f\u5e76\u62d3\u5c55\u7740Http\u534f\u8bae\uff0c\u5411\u7740\u6d4f\u89c8\u5668\u4e4b\u5916\u7684\u65b9\u5411\u53d1\u5c55\u3002<\/p>\n<p>\u867d\u7136jdk\u4e2d\u7684java.net\u5305\u4e2d\u63d0\u4f9b\u4e86\u4e00\u4e9b\u57fa\u672c\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7http\u534f\u8bae\u6765\u8bbf\u95ee\u7f51\u7edc\u8d44\u6e90\uff0c\u4f46\u662f\u5927\u591a\u6570\u573a\u666f\u4e0b\uff0c\u5b83\u90fd\u4e0d\u591f\u7075\u6d3b\u548c\u5f3a\u5927\u3002HttpClient\u81f4\u529b\u4e8e\u586b\u8865\u8fd9\u4e2a\u7a7a\u767d\uff0c\u5b83\u53ef\u4ee5\u63d0\u4f9b\u6709\u6548\u7684\u3001\u6700\u65b0\u7684\u3001\u529f\u80fd\u4e30\u5bcc\u7684\u5305\u6765\u5b9e\u73b0http\u5ba2\u6237\u7aef\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[3],"class_list":["post-30","post","type-post","status-publish","format-standard","hentry","category-5","tag-3"],"_links":{"self":[{"href":"https:\/\/www.xudongvp.com\/index.php?rest_route=\/wp\/v2\/posts\/30","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xudongvp.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xudongvp.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xudongvp.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xudongvp.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=30"}],"version-history":[{"count":6,"href":"https:\/\/www.xudongvp.com\/index.php?rest_route=\/wp\/v2\/posts\/30\/revisions"}],"predecessor-version":[{"id":43,"href":"https:\/\/www.xudongvp.com\/index.php?rest_route=\/wp\/v2\/posts\/30\/revisions\/43"}],"wp:attachment":[{"href":"https:\/\/www.xudongvp.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=30"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xudongvp.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=30"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xudongvp.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=30"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}