HTTPUrlConnection PUT无法将JSON发送到服务器

Question

我有以下代码，通过它我无法使用PUT请求向我的服务器发送json字符串。服务器有REST api。

 try {


            m_url = new URL(URL);
            m_conn = (HttpURLConnection) m_url.openConnection();
            URL url = m_conn.getURL();
            Log.d("Sending to --->", url.toString());

            JSONObject jsonObject = new JSONObject();
            JSONObject jsondtObj = new JSONObject();
            JSONObject jsonitObj = new JSONObject();
            JSONArray jsonArray = new JSONArray();

            jsonObject.put("addr_locality_o", "White plains");
            jsonArray.put(jsonObject);
            jsondtObj.put("data", jsonArray);
            jsonitObj.put("template",jsondtObj);

            Log.d("sending JSON: " , jsonitObj.toString());
            String sessionID = m_qeeAppCtrl.getSessTok();
            Log.d("session Token: " , sessionID);


            m_conn.setDoOutput(true);
            m_conn.setRequestMethod("PUT");
            m_conn.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
            m_conn.setRequestProperty("Cookie", sessionID);


            OutputStream out = m_conn.getOutputStream();
            out.write(jsonitObj.toString().getBytes("UTF-8"));
            out.close();
            m_conn.getInputStream();

            retc = m_conn.getResponseCode();
            Log.d("Response : ", String.valueOf(retc));


            if (retc == 200) {
                Log.d("NO Exception: ", "");
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
            Log.d("Exception: ", e.getMessage());
        } catch (IOException e) {
            e.printStackTrace();
            Log.d("Exception: ", e.getMessage());
        } catch (Exception e) {
            Log.d("Exception: ", e.getMessage());
        }finally {
            return retc;
        }

我在服务器日志中没有任何东西，同时，我在logcat窗口中没有任何异常，也没有在日志文件中打印响应代码。我查看了其他论坛，但即使在应用所有解决方案（如UTf-8编码）之后，仍然没有线索：（

请帮忙

由于