//一种方法是设置全局的代理,在程序中如下设置：                System.setProperty("proxySet", "true");         System.setProperty("http.proxyHost", "192.168.7.33");         System.setProperty("http.proxyPort", "8080");                //还有一种就是在发送每次请求的时候设置代理：                URL url = new URL("http://www.open-open.com");         Proxy proxy = new Proxy(Proxy.Type.DIRECT.HTTP, new InetSocketAddress("192.168.7.33", 8080));         HttpURLConnection conn = (HttpURLConnection) url.openConnection(proxy);         InputStream in = conn.getInputStream();         BufferedReader bin = new BufferedReader(new InputStreamReader(in));         String s = null;         while((s=bin.readLine())!=null){             System.out.println(s);         }         bin.close();