如何在java中使用代理獲取URL連接？

Question

我想在運行時使用代理創建url連接。我的代碼如下：

Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("10.10.100.100", 80)); 
HttpURLConnection connection = 
    (HttpURLConnection)new URL("http://abc.abcd.com").openConnection(proxy); 

但這不起作用。任何人都知道爲什麼？

Answer 1

添加答案爲今後遊客

Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("10.10.100.100", 80)); 
HttpURLConnection connection =(HttpURLConnection)new URL("http://abc.abcd.com").openConnection(proxy); 
connection.setDoOutput(true); 
connection.setDoInput(true); 
connection.setRequestProperty("Content-type", "text/xml"); 
connection.setRequestProperty("Accept", "text/xml, application/xml"); 
connection.setRequestMethod("POST"); 

Answer 2

dku.rajkumar的方式不和我一起工作的幫助。

我嘗試這個，它的工作，但它需要兩倍的時間。

Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("10.10.100.100", 80)); 

    HttpURLConnection connection = 
     (HttpURLConnection)new URL("http://abc.abcd.com").openConnection(proxy); 
    ((HttpURLConnection)new URL("http://abc.abcd.com").openConnection(proxy)).getInputStream(); 

System.out.println(connection.usingProxy()); 

結果爲真

沒有 ((HttpURLConnection)new URL("http://abc.abcd.com").openConnection(proxy)).getInputStream();

結果是假