Springmvc提供的传递数据的方式

@RequestMapping(value="findById.action")
public String findById(HttpServletRequest request,Integer id,Model model,Map<String, Object> map){
User user=new User();
user.setId(20);
user.setName("jack");
user.setAge(20);
//request.setAttribute("user", user);
//model.addAttribute("user", user);
map.put("user", user);
return "success";

}