android发送post请求

//ps:此函数必须在线程中调用（因为函数抛出异常，调用时要包在try--catch里面）
private void start_run() throws Exception{
        String urlPath = new String("http://hnzldzkj.cn/readkey");
        //String urlPath = new String("http://localhost:8080/Test1/HelloWorld?name=丁丁".getBytes("UTF-8"));
        String param="name="+URLEncoder.encode("丁丁","UTF-8");
        //建立连接
        URL url=new URL(urlPath);
        HttpURLConnection httpConn=(HttpURLConnection)url.openConnection();
        //设置参数
        httpConn.setDoOutput(true);     //需要输出
        httpConn.setDoInput(true);      //需要输入
        httpConn.setUseCaches(false);   //不允许缓存
        httpConn.setRequestMethod("POST");      //设置POST方式连接
        //设置请求属性
        httpConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        httpConn.setRequestProperty("Connection", "Keep-Alive");// 维持长连接
        httpConn.setRequestProperty("Charset", "UTF-8");
        //连接,也可以不用明文connect，使用下面的httpConn.getOutputStream()会自动connect
        httpConn.connect();
        //建立输入流，向指向的URL传入参数
        DataOutputStream dos=new DataOutputStream(httpConn.getOutputStream());
        dos.writeBytes(param);
        dos.flush();
        dos.close();
        //获得响应状态
        int resultCode=httpConn.getResponseCode();
        if(HttpURLConnection.HTTP_OK==resultCode){
            StringBuffer sb=new StringBuffer();
            String readLine=new String();
            BufferedReader responseReader=new BufferedReader(new InputStreamReader(httpConn.getInputStream(),"UTF-8"));
            while((readLine=responseReader.readLine())!=null){
                sb.append(readLine).append("\n");
            }
            responseReader.close();
            System.out.println(sb.toString());
        }
    }