SpringMVC使用session实现简单登录

﹏ヽ暗。殇╰゛Y 2022-09-24 14:24 107阅读 0赞

1.首先为了能直观地在jsp页面体现session的内容，我使用了jstl表达式，首先在pom.xml中引入jstl的依赖

<dependency>
    			<groupId>jstl</groupId>
    			<artifactId>jstl</artifactId>
    			<version>1.2</version>
    		</dependency>

2.编写登录界面以及登录成功界面

登录界面

<%@ page contentType="text/html; charset=utf-8"
        pageEncoding="utf-8"%>
    <!DOCTYPE html >
    <html>
    <head>
    <meta charset="utf-8">
    <title>用户登录</title>
    </head>
    <body>
    	<form action="login" method="post">
    		<input type="text" name="uname" /><br/><br/>
    		<input type="password" name="pwd" /><br/><br/>
    		<input type="submit" value="登录"><br/><br/>
    	</form>
    </body>
    </html>

登录成功界面

<%@ page contentType="text/html; charset=utf-8"
        pageEncoding="utf-8"%>
    <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
    <!DOCTYPE html >
    <html>
    <head>
    <meta charset="utf-8">
    <title>成功</title>
    </head>
    <body>
    	<h1>${sessionScope.user.uname }登录成功!!!</h1>
    	<h2>欢迎您,${sessionScope.uname }</h2>
    </body>
    </html>

3.编写请求处理类以及实体类

实体类

package com.yc.entity;
    
    public class User {
    	private String uname;
    	private String pwd;
    	
    	public String getUname() {
    		return uname;
    	}
    	public void setUname(String uname) {
    		this.uname = uname;
    	}
    	public String getPwd() {
    		return pwd;
    	}
    	public void setPwd(String pwd) {
    		this.pwd = pwd;
    	}
    	
    	public String toString() {
    		return "User [uname=" + uname + ", pwd=" + pwd + "]";
    	}
    }

请求处理类

package com.yc.controllers;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.ModelMap;
    import org.springframework.web.bind.annotation.ModelAttribute;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.SessionAttributes;
    
    import com.yc.entity.User;
    
    @Controller
    @SessionAttributes({"user","uname"})
    public class LoginController {
    
    	@RequestMapping("/login")
    	public String login(User user,ModelMap map) {
    		//user会自己注入session中
    		//将uname放入session作用域中，这样转发页面也可以取到这个数据。
    		map.addAttribute("uname", user.getUname());
    		return "loginSuccess";
    	}
    }

4.运行测试

![20160802172242094][]

![20160802172252126][]

OK,到现在我们利用session实现的用户登录已经可以了![大笑][laugh.gif]

[20160802172242094]: /images/20220719/1227520c6b6f4a6b8bfa8b4706f6579e.png
[20160802172252126]: /images/20220719/ddfd6610f64d45aebc18d7006168b09b.png
[laugh.gif]: /images/20220719/6551b77ad21b4c05a8179f82a616d8f1.png