Spring MVC @SessionAttributes注解

不念不忘少年蓝@ 2022-05-16 23:47 224阅读 0赞

@SessionAttributes

可以给它配置一个字符串数组，这个数组对应的是数据模型对应的键值对，然后将这些键值对保存到session中。

创建User

package com.po;
    public class User {
    	private String userName;
    	private String passWord;
    	public String getUserName() {
    		return userName;
    	}
    	public void setUserName(String userName) {
    		this.userName = userName;
    	}
    	public String getPassWord() {
    		return passWord;
    	}
    	public void setPassWord(String passWord) {
    		this.passWord = passWord;
    	}	
    }

创建UserController

package com.controller;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.SessionAttributes;
    import org.springframework.web.servlet.ModelAndView;
    import com.po.User;
    @Controller
    @SessionAttributes(names= {"userName"},types= {User.class})
    public class UserController {
    	@RequestMapping("/getUser")
    	public ModelAndView getUser(String userName) {
    		ModelAndView mv=new ModelAndView();
    		User user=new User();
    		user.setUserName("baixue");
    		user.setPassWord("123");
    		//根据用户名
    		mv.addObject("userName", userName);
    		//根据类型
    		mv.addObject("user", user);
    		mv.setViewName("success");
    		return mv;
    	}
    }

创建success.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
        pageEncoding="utf-8"%>
    <%@page import="com.po.User" %>
    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="utf-8">
    <title>success</title>
    </head>
    <body>
    	<%
    		String userName=(String)session.getAttribute("userName");
    		User user=(User)session.getAttribute("user");
    	%>
    	<table>
    		<tr>
    			<td>用户名：<%=userName %></td>
    		</tr>
    		<tr>
    			<td>用户名：<%=user.getUserName() %></td>
    		</tr>
    		<tr>
    			<td>密码：<%=user.getPassWord() %></td>
    		</tr>
    	</table>
    </body>
    </html>

启动Tomcat并访问控制器

![70][]

[70]: /images/20220517/dd6ba55c080e416985c1805681695f49.png