如何使用Socket类在Java中执行HTTP1.1 Post?

String host = "sub.example.com";
int port = 80;
String path = "/Servlet";
StringBuilder data = new StringBuilder();
data.append(URLEncoder.encode("NameA", "UTF-8")).append('=').append(URLEncoder.encode("ValueA", "UTF-8"));
data.append('&').append(URLEncoder.encode("NameB", "UTF-8")).append('=').append(URLEncoder.encode("NameB", "UTF-8"));

InetAddress addr = InetAddress.getByName(host);
Socket socket = new Socket(addr, port);
BufferedWriter wr = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream(), "UTF8"));

wr.write("POST "+path+" HTTP/1.0\r\n");
wr.write("Content-Length: "+data.length()+"\r\n");
wr.write("Content-Type: application/x-www-form-urlencoded\r\n");
wr.write("\r\n");
// Send data
wr.write(data.toString());
wr.flush();
wr.close();

有什么想法吗?