spring mvc requestMapping。Java中使用httpurlconnection发送post请求，无法接收到参数

RanCood 2016-04-21 05:19:35

Java中使用httpurlconnection发送post请求，无法接收到参数
接收端



@RequestMapping("/receiveData")

@ResponseBody

public String receiveData(@RequestParam HashMap<String, Object> parameterMap){

		String json_str = parameterMap.get("data")==null?"":parameterMap.get("data").toString();

发送端



     try {

			

			String url = targetURL;

			URL targetUrl = new URL(targetURL);

			HttpURLConnection httpConnection = (HttpURLConnection) targetUrl.openConnection();

			httpConnection.setDoOutput(true);

			httpConnection.setDoInput(true);

			httpConnection.setUseCaches(false); 

			httpConnection.setRequestMethod("POST");

			httpConnection.setRequestProperty("Content-Type", "application/json");



			JSONObject json = new JSONObject();

        	json.put("DEPT_NAME", "测试");

        	json.put("FIELD_2_1", "测试1");

        	json.put("FIELD_2_2", "测试2");

        	json.put("FIELD_2_3", "测试3");

        	String param = URLEncoder.encode(json.toString(),"utf-8");

			OutputStream outputStream = httpConnection.getOutputStream();

			outputStream.write(param.getBytes());

			outputStream.flush();

			

			if (httpConnection.getResponseCode() != 200) {

				throw new RuntimeException("Failed : HTTP error code : " + httpConnection.getResponseCode());

			}



			BufferedReader responseBuffer = new BufferedReader(

					new InputStreamReader((httpConnection.getInputStream())));



			String output;

			System.out.println("Output from Server:\n");

			while ((output = responseBuffer.readLine()) != null) {

				System.out.println(output);

			}



			httpConnection.disconnect();



		} catch (MalformedURLException e) {



			e.printStackTrace();



		} catch (IOException e) {



			e.printStackTrace();



		}