springmvc里HttpServletRequest和model的区别

Question

@RequestMapping(value="/list",method=RequestMethod.GET)    public String list(Model model) {          //前台输出必须使用形如${ul.value.id }的形式        model.addAttribute("userList",userList);        return "user/userList";    }        @RequestMapping(value="/userlist",method=RequestMethod.GET)    public String list(HttpServletRequest request) {      //前台输出必须使用形如${user.id }的形式        List<User> userList = new ArrayList<User>();        userList.add(new User("1","yonghu1","121","[e-mail]"));        userList.add(new User("2","yonghu2","122","[e-mail]"));        userList.add(new User("3","yonghu3","123","[e-mail]"));        request.setAttribute("userList", userList);        return "user/userList";    }为什么前台取值时得使用不同的方法呢？HttpServletRequest和model不都是以map键值对的形式存数据的吗？

Answer 1

谁更简单就用谁呗