Nio and http proxy

Question

I want to use http proxy in nio.but i can't find any methods in socketChannel.(if use socket, i could use such code do impl this
Socket socket = new Socket(new Proxy(......));
socket.connect(serverAddress); now i want to set a http proxy to SocketChannel, but i found it's impossiable to construct a SocketChannel from a pre exist socket.
how to use proxy in nio.
thanks all.

Answer 1

I use tcp to send my request with a nio Client. The header of my http request :
StringBuffer buffer = new StringBuffer();
buffer.append("POST ");
String path = "/";
buffer.append(path + " ");
buffer.append("HTTP/1.1\r\n");
buffer.append("Content-type: text/xml\r\n");
buffer.append("Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2\r\n");
buffer.append("Host: 10.194.55.23:80\r\n");
buffer.append("Connection: keep-alive\r\n");
buffer.append("Content-Length: 0\r\n");
buffer.append("\r\n");