HttpClient中头部Header用法

最新推荐文章于 2025-10-07 21:25:01 发布

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本文详细介绍了如何使用httpclient项目中的Header类来设置HTTP请求的头部参数，包括设置Accept、Accept-Charset、Accept-Encoding、Accept-Language、Connection、Cookie、Host和Refer等常见头部信息。并通过实例展示了发送请求时如何设置头部信息，以及接收响应时如何获取头部信息。

commons-httpclient是一个遗留版本，官方已经不推荐使用，正确的方法是使用httpclient项目的httpcore-x.xxx.jar包中的Header：

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import org.apache.http.Header;

发送请求时设置头部：

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HttpClient httpClient = new DefaultHttpClient();
//創建一個httpGet方法
HttpGet httpGet = new HttpGet("http://www.cnblogs.com/loveyakamoz/archive/2011/07/21/2113252.html");
//設置httpGet的头部參數信息
httpGet.setHeader("Accept", "Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
httpGet.setHeader("Accept-Charset", "GB2312,utf-8;q=0.7,*;q=0.7");
httpGet.setHeader("Accept-Encoding", "gzip, deflate");
httpGet.setHeader("Accept-Language", "zh-cn,zh;q=0.5");
httpGet.setHeader("Connection", "keep-alive");
httpGet.setHeader("Cookie", "__utma=226521935.73826752.1323672782.1325068020.1328770420.6;");
httpGet.setHeader("Host", "www.cnblogs.com");
httpGet.setHeader("refer", "http://www.baidu.com/s?tn=monline_5_dg&bs=httpclient4+MultiThreadedHttpConnectionManager");
httpGet.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1; rv:6.0.2) Gecko/20100101 Firefox/6.0.2");

收到respose时获取头部信息：

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</span>Header headers[] = response.getAllHeaders();
int i = 0;
while (i < headers.length) {
<span style="white-space:pre"> </span>System.out.println(headers[i].getName() + ": " + headers[i].getValue());
i++;
}