HttpURLConnection请求数据

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private void geData() {
       // 设置接口地址
       try {
           URL url = new URL(path);

           HttpURLConnection connection = (HttpURLConnection) url
                   .openConnection();

           // 设置连接超时
           connection.setConnectTimeout(5000);
           // 设置读取超时
           connection.setReadTimeout(5000);
           // 设置请求方式
           connection.setRequestMethod("POST");

           //得到输出流,象服务器传递参数
           OutputStream outputStream = connection.getOutputStream();

           PrintWriter printWriter=new PrintWriter(outputStream);
           //设置要传递的数据
           printWriter.println(str);

           printWriter.flush();

           // 连接网络
           connection.connect();
           // 如果响应码等于200代表请求成功
           if (connection.getResponseCode() == 200) {
               // 得到服务器返回的信息,是流的形式返回回来的
               InputStream inputStream = connection.getInputStream();
               BufferedReader bufferedReader = new BufferedReader(
                       new InputStreamReader(inputStream, "UTF-8"));

               String str;
               StringBuffer stringBuffer = new StringBuffer();
               // 一次读一行
               while ((str = bufferedReader.readLine()) != null) {
                   // 把读到的每一行信息都追加到stringBuffer里
                   stringBuffer.append(str);
               }

               String data = stringBuffer.toString();

//               System.out.println(data);

               // 将json数据转成对象
               Gson gson = new Gson();

               Bean bean = gson.fromJson(data, Bean.class);

               System.out.println(bean.toString());
               // 把对象通过handler发送给主线程
               Message msg = Message.obtain();
//               msg.obj = root;
//               handler.sendMessage(msg);

           } else {

               Toast.makeText(this, " 请求失败 ", 0).show();

           }

       } catch (MalformedURLException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       } catch (IOException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }

   }

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