@RequestMapping(value = EDIT_URL, method = RequestMethod.GET)
 @ResponseBody
 public String editUser(
     @RequestParam(value = SELECTED_ID_PARAM, required = true) String id,
     @RequestParam(value = NAME_PARAM, required = true) String name,
     @RequestParam(value = SECOND_NAME_PARAM, required = true) String secondName,
     @RequestParam(value = AGE_PARAM, required = true) String age) {
   User user = userService.get(Long.parseLong(id));
   user.setName(name);
   user.setSecondName(secondName);
   user.setAge(Integer.parseInt(age));
   // user.setRegistrationDate(new Date());
   userService.update(user);
   return "User successfully edited. " + REFRESH_PAGE_MESSAGE;
 }
 @RequestMapping(value = DELETE_URL, method = RequestMethod.GET)
 @ResponseBody
 public String deleteUsers(@RequestParam(value = SELECTED_IDS_PARAM, required = true) String ids) {
   List<Long> parsedIds = parseIds(ids);
   userService.delete(parsedIds);
   return "Users were successfully deleted. " + REFRESH_PAGE_MESSAGE;
 }
 @RequestMapping(
     value = WELCOME_PAGE_URL,
     method = {RequestMethod.GET, RequestMethod.HEAD})
 public String getWelcomePage(HttpSession session) {
   session.setAttribute(USERS_SESSION, userService.getAll());
   return MAIN_PAGE;
 }
 @RequestMapping(value = GET_URL, method = RequestMethod.GET)
 @ResponseBody
 public String getUser(@RequestParam(value = SELECTED_ID_PARAM, required = true) String id) {
   User user = userService.get(Long.parseLong(id));
   Map<String, String> userMap = new LinkedHashMap<String, String>();
   userMap.put(NAME_PARAM, user.getName());
   userMap.put(SECOND_NAME_PARAM, user.getSecondName());
   userMap.put(AGE_PARAM, String.valueOf(user.getAge()));
   return JSONValue.toJSONString(userMap);
 }
 @RequestMapping(value = SAVE_URL, method = RequestMethod.GET)
 @ResponseBody
 public String saveUser(
     @RequestParam(value = NAME_PARAM, required = true) String name,
     @RequestParam(value = SECOND_NAME_PARAM, required = true) String secondName,
     @RequestParam(value = AGE_PARAM, required = true) String age) {
   User user = new User();
   user.setName(name);
   user.setSecondName(secondName);
   user.setAge(Integer.parseInt(age));
   user.setRegistrationDate(new Date());
   userService.add(user);
   return "User successfully created. " + REFRESH_PAGE_MESSAGE;
 }