HttpURLConnection发送和接受返回值

　　　　 URL url = new URL(sb.toString());//请求的地址
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("POST");//请求方式
        BufferedReader in = new BufferedReader(new InputStreamReader(
                url.openStream()));
　　　　 //返回结果
        String inputline = in.readLine();
　　　　 System.out.println(inputline);