@RequestMapping(value="/list",method=RequestMethod.GET)     public String list(Model model) {          //前台输出必须使用形如${ul.value.属性名 }的形式         model.addAttribute("userList",userList);         return "user/userList";     }          @RequestMapping(value="/userlist",method=RequestMethod.GET)     public String list(HttpServletRequest request) {      //前台输出必须使用形如${user.id }的形式         List<User> userList = new ArrayList<User>();         userList.add(new User("1","yonghu1","121","1@qq.com"));         userList.add(new User("2","yonghu2","122","2@qq.com"));         userList.add(new User("3","yonghu3","123","3@qq.com"));         request.setAttribute("userList", userList);         return "user/userList";     }