Spring MVC的@SessionAttributes注解

青旅半醒 2021-07-24 14:41 484阅读 0赞

**一 控制器**

package org.fkit.controller;
    
    import org.fkit.domain.User;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.SessionAttributes;
    
    
    @Controller
    // 将Model中的属性名为user的转存HttpSession对象当中
    @SessionAttributes("user")
    public class SessionAttributesController{
        
        // 该方法映射的请求为http://localhost:8080/SessionAttributesTest/login
        @RequestMapping(value="/login")
         public String login(
                 @RequestParam("loginname") String loginname,
                 @RequestParam("password") String password,
                 Model model ) {
             // 创建User对象，装载用户信息
             User user = new User();
             user.setLoginname(loginname);
             user.setPassword(password);
             user.setUsername("admin");
             // 将user对象添加到Model当中
             model.addAttribute("user",user);
             return "welcome";
         }
    }

**二 领域模型**

package org.fkit.domain;
    import java.io.Serializable;
    
    // 域对象，实现序列化接口
    public class User implements Serializable{
         
         private static final long serialVersionUID = 1L;
         // 私有字段
         private String loginname;
         private String password;
         private String username;
         
         // 公共构造器
         public User() {
               super();
         }
         // set/get方法
         public String getLoginname() {
               return loginname;
         }
         public void setLoginname(String loginname) {
               this.loginname = loginname;
         }
         public String getPassword() {
               return password;
         }
         public void setPassword(String password) {
               this.password = password;
         }
         public String getUsername() {
               return username;
         }
         public void setUsername(String username) {
               this.username = username;
         }
         
    }

**三 配置文件**

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:p="http://www.springframework.org/schema/p"
        xmlns:mvc="http://www.springframework.org/schema/mvc"
         xmlns:context="http://www.springframework.org/schema/context"
        xsi:schemaLocation="
            http://www.springframework.org/schema/beans
             http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/mvc
            http://www.springframework.org/schema/mvc/spring-mvc.xsd     
            http://www.springframework.org/schema/context
             http://www.springframework.org/schema/context/spring-context.xsd">
            
        
        <context:component-scan base-package="org.fkit.controller"/>
         
        <mvc:annotation-driven/>
         
        <mvc:default-servlet-handler/>
        
        
         <bean id="viewResolver"
               class="org.springframework.web.servlet.view.InternalResourceViewResolver"
              p:prefix="/WEB-INF/content/" p:suffix=".jsp"/>
        
    </beans>

**四 视图**

1 index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
        pageEncoding="UTF-8"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"  "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html;  charset=UTF-8">
    <title>测试@SessionAttributes注解</title>
    </head>
    <body>
    <h3>测试@SessionAttributes注解</h3>
    <form action="login" method="post">
         <table>
             <tr>
                <td><label>登录名: </label></td>
                 <td><input type="text" id="loginname"  name="loginname" ></td>
             </tr>
             <tr>
                <td><label>密码: </label></td>
                 <td><input type="password" id="password"  name="password"></td>
             </tr>
             <tr>
                 <td><input id="submit" type="submit" value="登录"></td>
             </tr>
         </table>
    </form>
    </body>
    </html>

2 welcome.jsp

**五 测试**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70]: /images/20210724/94fec41dda7b4156a8e7e0fa145100f8.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1]: /images/20210724/11a5f573ffc3486b8b1cb18850576da3.png