SpringBoot web开发（2）session登录注册

￡神魔★判官ぃ 2021-10-15 02:53 184阅读 0赞

## SpringBoot web开发（2）session登录注册 ##

1.  新建 LoginController.java 文件
2.  使用 session 控制登录

@Autowired
    HttpSession session;
    //添加sessionKey
    session.setAttribute("name", "admin");
    //获取session
    session.getAttribute("name")
    //删除
    session.removeAttribute("name");

--------------------

示例：(简单控制登录)

*  主页控制器

import javax.servlet.http.HttpSession;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.*;
    
    @Controller
    public class HomeController{
    
        @Autowired
        HttpSession session;
    
        @RequestMapping("/")
        public String Home(){
            if(!"admin".equals(session.getAttribute("name"))){
                //重定向 到 登录页面
                return "redirect:/login/";
            }
            //登录成功
            return "home/index";
        }
    }

--------------------

*  登录控制器

package com.learn.first.controller;
    
    import javax.servlet.http.HttpSession;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    // import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.servlet.view.RedirectView;
    
    @Controller
    @RequestMapping("/login")
    public class LoginController{
    
        @Autowired
        HttpSession session;
    
        @RequestMapping("")
        public String index(){
            return "login/index";
        }
    
        @RequestMapping("/in")
        public RedirectView in(@RequestParam String lname,@RequestParam String pwd){
            if("admin".equals(lname) && "admin".equals(pwd)){
                RedirectView redirectTarget = new RedirectView();
                redirectTarget.setContextRelative(true);
                redirectTarget.setUrl("/");
                session.setAttribute("name", "admin");
                
                return redirectTarget;
            }
    
            RedirectView redirectTarget = new RedirectView();
            redirectTarget.setContextRelative(true);
            redirectTarget.setUrl("/login/");
            return redirectTarget;
        }
    
        @RequestMapping("/out")
        public String out(){
            // session.setAttribute("name", null);
            session.removeAttribute("name");
            return "redirect:/login/";
        }
    }

--------------------

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    	<modelVersion>4.0.0</modelVersion>
    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>2.1.7.RELEASE</version>
    		<relativePath/> 
    	</parent>
    	<groupId>com.learn</groupId>
    	<artifactId>first</artifactId>
    	<version>0.0.1-SNAPSHOT</version>
    	<name>first</name>
    	<description>Demo project for Spring Boot</description>
    
    	<properties>
    		<java.version>1.8</java.version>
    	</properties>
    
    	<dependencies>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter</artifactId>
    		</dependency>
    
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-web</artifactId>
    		</dependency>
    
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-thymeleaf</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>nz.net.ultraq.thymeleaf</groupId>
    			<artifactId>thymeleaf-layout-dialect</artifactId>
    		</dependency>
    		
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-devtools</artifactId>
    			<scope>runtime</scope>
    			<optional>true</optional>
    		</dependency>
    
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-test</artifactId>
    			<scope>test</scope>
    		</dependency>
    	</dependencies>
    
    	<build>
    		<plugins>
    			<plugin>
    				<groupId>org.springframework.boot</groupId>
    				<artifactId>spring-boot-maven-plugin</artifactId>
    			</plugin>
    		</plugins>
    	</build>
    
    </project>

1.  使用 thymeleaf模板 返回页面
2.  打开浏览器，http：//127.0.0.1:8080 测试
3.  [demo][]

[demo]: https://github.com/jiegemena/springbootlearn