java 发送http json请求

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public void getRemoteId(HttpServletRequest request,Model model){

        String name = request.getParameter("userName");

        String gender = request.getParameter("userGender");

        String birthDate = request.getParameter("birthDate");

        String birthHour = request.getParameter("birthHour");

        String birthMin = request.getParameter("birthMin");

        birthDate +=" "+birthHour+":"+birthMin;

        String addrId = request.getParameter("borough");

        String productId = request.getParameter("ProductId");

        String birthDateAccurate = request.getParameter("BirthAccurateSelect");

        String add_url = "http://test.com:8080/report.jo";

        String query = " {\"mainUser\":{\"name\":\""+name+"\",\"gender\":\""+gender+"\",\"birthDate\":\""+birthDate+"\",\"birthDateAccurate\":\""+birthDateAccurate+"\",\"addrId\":\""+addrId+"\"},\"productId\":\""+productId+"\"}";

        try
{

            URL url = new
URL(add_url);

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

            connection.setDoInput(true);

            connection.setDoOutput(true);

            connection.setRequestMethod("POST");

            connection.setUseCaches(false);

            connection.setInstanceFollowRedirects(true);

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

            connection.connect();

            DataOutputStream out = new
DataOutputStream(connection.getOutputStream());

            JSONObject obj = new
JSONObject();

            String token = "d5f224c9f83874da5b5025794c773e8e";

            obj.put("query", query);

            obj.put("token", token);

            out.writeBytes(obj.toString());

            out.flush();

            out.close();

            BufferedReader reader = new
BufferedReader(new
InputStreamReader(connection.getInputStream()));

            String lines;

            StringBuffer sbf = new
StringBuffer();

             while
((lines = reader.readLine()) != null) {

                    lines = new
String(lines.getBytes(), "utf-8");

                    sbf.append(lines);

                }

                System.out.println(sbf);

                reader.close();

                // 断开连接

                connection.disconnect();

        } catch
(MalformedURLException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } catch
(IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }