将Spring Session存储到Redis中实现持久化

客官°小女子只卖身不卖艺 2024-03-22 21:07 67阅读 0赞

#### 文章目录 ####

*  Session持久化
 *   *  1. 添加依赖
     *  2. 配置redis连接信息
     *  3. 存储和读取session从Redis

## Session持久化 ##

### 1. 添加依赖 ###

在项目中添加session依赖和redis依赖，如下所示：

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-redis</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.session</groupId>
                <artifactId>spring-session-data-redis</artifactId>
            </dependency>

### 2. 配置redis连接信息 ###

# redis连接配置信息
    spring.redis.host=124.221.76.124
    # 不写默认wei6379，数据库为0
    # spring.redis.database=15
    spring.redis.port=6379
    
    # 配置session连接信息
    spring.session.store-type=redis
    server.servlet.session.timeout=1800
    spring.session.redis.flush-mode=on_save
    spring.session.redis.namespace=spring:session

### 3. 存储和读取session从Redis ###

package com.example.sp_redis.controller;
    
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpSession;
    
    /**
     * 实现session持久化
     * @author zq
     * @date 2023-07-26 14:37
     */
    
    @RestController
    public class UserController {
        
        private static final String SESS_USER_KEY = "SESS_USER_KEY";
        @RequestMapping("/login")
        public String login(HttpSession httpSession) {
        
            //存入session
            httpSession.setAttribute(SESS_USER_KEY, "wangwu");
            return "Session set success.";
        }
        @RequestMapping("/getuser")
        public String getUser(HttpServletRequest request) {
        
            String user = "NULL";
            HttpSession session = request.getSession(false);
            if (session != null) {
        
                //从redis中获取session
                Object userObj = session.getAttribute(SESS_USER_KEY);
                if (userObj != null) {
        
                    user = userObj.toString();
                }
            }
            return user;
        }
    }

**我们访问localhost:8080/login 将session存入redis**  
![在这里插入图片描述][f248cc873c2b47ecb5616765bb061782.png]

**接着访问localhost:8080/login可以读取到缓存中的数据**

![在这里插入图片描述][dedbca27e6e049ec8ea4c937282f6dce.png]  
接着我们可以在redis客户端看到存入到session

![在这里插入图片描述][ddb028d187b6470c955271b295444dfe.png]

[f248cc873c2b47ecb5616765bb061782.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/14/946d4ec2456a4d2aa4799b6119a32020.png
[dedbca27e6e049ec8ea4c937282f6dce.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/14/50b48b43f04449c797a4c2949aa230a8.png
[ddb028d187b6470c955271b295444dfe.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/14/503a50ed321a4342952f60b16188c3c4.png