//请求

 HttpURLConnection conn = (HttpURLConnection)new URL(path).openConnection();

 conn.setConnecTimeout(5000);

 conn.setRequestMethod("POST");

 conn.setDoOutput(true);

 conn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");

 conn.setRequestProperty("Content-length", "aaa");

 if(conn.getResponseCode()== 200){

   return true;

 }