Spring MVC学习04传值

在pom文件中导入相关依赖：

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
            <scope>provided</scope>
        </dependency>

建立用于测试的Controller：DataController

 1 package com.yas.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.bind.annotation.SessionAttributes;
 7 import org.springframework.web.bind.support.SessionStatus;
 8 import org.springframework.web.servlet.ModelAndView;
 9 
10 import javax.servlet.http.HttpServletRequest;
11 import javax.servlet.http.HttpSession;
12 
13 @Controller
14 @RequestMapping("/data")
15 //SessionAttributes中包含的key，会从Model对象存入Session中
16 @SessionAttributes(value = {"city","street"})
17 public class DataController {
18 
19     //使用Request和Session
20     @RequestMapping("/test1")
21     public String test1(HttpServletRequest request, HttpSession session){
22         request.setAttribute("name","张三");
23         session.setAttribute("age",18);
24 
25         return "data";
26     }
27 
28     @RequestMapping("/test2")
29     public String test2(Model model){
30         model.addAttribute("gender",true);
31 
32         model.addAttribute("city","北京");
33         model.addAttribute("street","长安街");
34         return "data2";
35     }
36 
37     @RequestMapping("/test3")
38     public String test4(SessionStatus sessionStatus){
39         //清空session
40         sessionStatus.setComplete();
41         return "data2";
42     }
43 
44     @RequestMapping("/test4")
45     public ModelAndView test4(){
46         //ModelAndView 可以整合视图和对象
47         ModelAndView modelAndView = new ModelAndView();
48 //        modelAndView.setViewName("forward:/index.jsp");
49         modelAndView.setViewName("hello");
50         modelAndView.addObject("claz","001");
51         return modelAndView;
52     }
53 
54 }

用于测试的页面：

data.jsp:

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    name:${requestScope.name}
    age:${sessionScope.age}
</body>
</html>

data2.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    gender:${requestScope.gender}<br>
    city:${sessionScope.city}<br>
    street:${sessionScope.street}
</body>
</html>

hello.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    hello jsp
    <br>
    claz:${requestScope.claz}
</body>
</html>