2.域对象共享数据

2023-11-11 17:43:34

index.html

 1 <!DOCTYPE html>
 2 <html lang="en" xmlns:th="http://www.thymeleaf.org">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>Title</title>
 6 </head>
 7 <body>
 8 <h1>首页</h1><br>
 9 <a th:href="@{/testRequestByServletAPI}">通过ServletAPI向request域共享数据</a><br><br><br>
10 
11 <a th:href="@{/testRequestByModelAndView}">通过ModelAndView向request域共享数据</a><br><br><br>
12 
13 
14 <a th:href="@{/testRequestByModel}">通过Model向request域共享数据</a><br><br><br>
15 
16 
17 <a th:href="@{/testRequestByMap}">通过Map向request域共享数据</a><br><br><br>
18 
19 <a th:href="@{/testRequestByModelMap}">通过ModelMap向request域共享数据</a><br><br><br>
20 </body>
21 </html>

Controller

 1 package com.sunnny.Controller;
 2 
 3 
 4 import org.springframework.stereotype.Controller;
 5 import org.springframework.ui.Model;
 6 import org.springframework.ui.ModelMap;
 7 import org.springframework.web.bind.annotation.RequestMapping;
 8 import org.springframework.web.servlet.ModelAndView;
 9 
10 import javax.servlet.http.HttpServletRequest;
11 import java.util.Map;
12 
13 @Controller
14 public class ScopeController {
15 
16 
17 
18 
19     //1.使用ServletAPI向request域对象共享数据
20     @RequestMapping("/testRequestByServletAPI")
21     public String testRequestByServletAPI(HttpServletRequest request){
22 
23         request.setAttribute("testRequestScope","hello,servletAPI");
24         return "success";
25     }
26 
27 
28 
29 
30 
31 
32     //2.使用ModelAndView向request域对象共享数据
33     @RequestMapping("/testRequestByModelAndView")
34     public ModelAndView testRequestByModelAndView(){
35         /*
36         ModelAndView有Model和View的功能
37         Model主要用于向请求域共享数据
38         View主要用于设置视图，实现页面跳转
39 
40          */
41         ModelAndView mav=new ModelAndView();
42 
43         //向请求域共享数据
44         mav.addObject("testRequestScope","hello,ModelAndView");
45 
46         System.out.println("++++++++++"+mav.getClass().getName());
47         //设置视图，实现页面跳转
48         mav.setViewName("success");
49 
50         return mav;
51     }
52 
53 
54     //3.使用Model向request域对象共享数据
55     @RequestMapping("/testRequestByModel")
56     public String testModel(Model model){
57 
58         model.addAttribute("testRequestScope","hello, Model");
59         System.out.println("++++++++++"+model.getClass().getName());
60         return "success";
61     }
62 
63     //4.使用map向request域对象共享数据
64     @RequestMapping("/testRequestByMap")
65     public String testMap(Map<String,Object> map){
66         map.put("testRequestScope","hello Map");
67         System.out.println("++++++++++"+map.getClass().getName());
68         return "success";
69     }
70 
71 
72     //5.使用ModelMap向request域对象共享数据
73     @RequestMapping("/testRequestByModelMap")
74     public String testModelMap(ModelMap modelMap){
75         modelMap.addAttribute("testRequestScope","hello ModelMap");
76         System.out.println("++++++++++"+modelMap.getClass().getName());
77         return "success";
78     }
79 
80 
81 
82 
83 
84 }

success.html

 1 <!DOCTYPE html>
 2 <html lang="en" xmlns:th="http://www.thymeleaf.org">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>Title</title>
 6 </head>
 7 <body>
 8 
 9 <h1>成功!!!</h1><br>
10 <p th:text="${testRequestScope}"></p><br><br><br>
11 
12 </body>
13 </html>