第五章：ModelAndView

 1 package com.iwakan.controller;
 2 
 3 import org.springframework.stereotype.Controller;
 4 import org.springframework.ui.Model;
 5 import org.springframework.web.bind.annotation.RequestMapping;
 6 import org.springframework.web.servlet.ModelAndView;
 7 
 8 import java.util.Map;
 9 
10 /**
11  * 三种方式实现作用域放值
12  */
13 @Controller
14 public class TestController {
15 
16     /**
17      * 第一种：返回值为ModelAndView
18      * @return
19      */
20     @RequestMapping("/hello")
21     public ModelAndView hello(){
22         ModelAndView mav = new ModelAndView();
23         mav.addObject("msg","spring mvc");
24         mav.setViewName("success");
25         return mav;
26     }
27 
28     /**
29      * 第二种：形参为Map
30      * @param map
31      * @return
32      */
33     @RequestMapping("/hello2")
34     public String hello2(Map<String,Object> map){
35         map.put("msg","spring mvc2");
36         return "success";
37     }
38 
39     /**
40      * 第三种：形参为Model
41      * @param model
42      * @return
43      */
44     @RequestMapping("/hello3")
45     public String hello3(Model model){
46         model.addAttribute("msg","spring mvc3");
47         return "success";
48     }
49 }