@ResponseBody
 @RequestMapping(value = "modify", method = RequestMethod.POST)
 public JSONObject modify(User user) {
   Boolean falg = userService.modify(user);
   JSONObject result = new JSONObject();
   result.put("flag", falg);
   return result;
 }
 @ResponseBody
 @RequestMapping(value = "deleteUser", method = RequestMethod.GET)
 public JSONObject deleteUser(int userId) {
   User user = new User();
   user.setId(userId);
   boolean result = userService.delete(user);
   JSONObject data = new JSONObject();
   data.put("result", result);
   return data;
 }
 @ResponseBody
 @RequestMapping(value = "usersInPage", method = RequestMethod.GET)
 public JSONObject GetUserList(int pageNum) {
   System.out.println("pageNUm:" + pageNum);
   List<User> users = userService.getAll();
   System.out.println(users);
   JSONArray userArray = JSONArray.fromObject(users);
   JSONObject data = new JSONObject();
   data.put("array", userArray);
   return data;
 }
 @ResponseBody
 @RequestMapping(
     value = "login",
     method = RequestMethod.POST,
     headers = {"content-type=application/json", "content-type=application/xml"})
 public JSONObject login(@RequestBody User user) {
   User userInfo = userService.login(user);
   JSONObject result = new JSONObject();
   if (userInfo != null) {
     result.put("code", 200);
     result.put("userData", JSONObject.fromObject(user));
   } else {
     result.put("code", 404);
   }
   return result;
 }
 @ResponseBody
 @RequestMapping(value = "get", method = RequestMethod.GET)
 public JSONObject get(User user) {
   User result = (User) userService.get(user);
   return JSONObject.fromObject(result);
 }