这应该可以解决问题：

URL url = new URL(yourUrlHere);
Proxy proxy = new Proxy(Proxy.Type.DIRECT, 
    new InetSocketAddress( 
        InetAddress.getByAddress(
            new byte[]{your, ip, interface, here}), yourTcpPortHere));
URLConnection conn = url.openConnection(proxy);

您完成了。不要忘记很好地处理异常，当然，请更改值以适合您的情况。

嗯，我省略了导入语句