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本文介绍了一个使用Java进行网络POST请求的具体实例,包括设置连接属性、发送表单数据、处理重定向及获取响应头等关键步骤。

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			String post = "email=" + URLEncoder.encode("e-mail", "UTF-8")
+ "&password=" + "password";
url = new URL(urlStr);

httpConn = (HttpURLConnection) url.openConnection();

//setInstanceFollowRedirects can then be used to set if
//redirects should be followed or not and this should be used before the
//connection is established (via getInputStream, getResponseCode, and other
//methods that result in the connection being established).

httpConn.setFollowRedirects(false);

//inorder to disable the redirects
httpConn.setInstanceFollowRedirects(false);

httpConn.setDoOutput(true);
httpConn.setDoInput(true);
httpConn.setRequestProperty("User-Agent",
"Mozilla/5.0 (compatible; MSIE 6.0; Windows NT)");
httpConn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");

//ok now, we can post it
PrintStream send = new PrintStream(httpConn.getOutputStream());
send.print(post);
send.close();
URL newURL = new URL(httpConn.getHeaderField("Location"));
System.out.println("the URL has move to "
+ httpConn.getHeaderField("Location"));
httpConn.disconnect();

参考文献
【1】http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4637447
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