SpringBoot------Redis实现分布式集群Session共享

1.添加pom.xml依赖

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

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

2.添加RedisSessionConfig.java配置

import org.springframework.context.annotation.Configuration;
import org.springframework.session.data.redis.config.annotation.web.http.EnableRedisHttpSession;

/**
 * @EnableRedisHttpSession 开启Redis Session缓存
 * maxInactiveIntervalInSeconds: session过期时间
 *
 * */
@Configuration
@EnableRedisHttpSession(maxInactiveIntervalInSeconds = 30)
public class RedisSessionConfig {

}

3.添加application.yml配置

spring:
  redis:
    database: 0
    host: localhost
    port: 6379
    password:

4.添加controller测试代码

@RestController
@RequestMapping("/user-info")
public class UserInfoController {

    //测试
    @GetMapping("/list2")
    public Map<String, Object> setSession(HttpServletRequest request) {

        Map<String, Object> map = new HashMap<>();
        request.getSession().setAttribute("request Url", request.getRequestURL());
        map.put("request Url", request.getRequestURL());
        return map;
    }

    @GetMapping("/list3")
    public Map<String, Object> getSession(HttpServletRequest request) {

        Map<String, Object> map = new HashMap<>();
        map.put("sessionIdUrl", request.getSession().getAttribute("request Url"));
        map.put("sessionId", request.getSession().getId());
        return map;
    }

}

5.修改idea配置 启动多个节点项目

第一个节点正常启动就可以了，我application.yml里面配了8771

第二个节点需要改端口号，我这里设置8772

6.依次访问地址

 http://127.0.0.1:8771/user/user-info/list2

http://127.0.0.1:8771/user/user-info/list3

http://127.0.0.1:8772/user/user-info/list3

发现：

两个节点获取到的SessionId是一致的，表明多节点实现Session共享