增加session共享依赖

<!--session共享 -->

<dependency>

<groupId>org.springframework.boot</groupId>    

<artifactId>spring-boot-starter-data-redis</artifactId>

</dependency> 

<dependency> 

<groupId>org.springframework.session</groupId>

<artifactId>spring-session</artifactId> 

</dependency>

配置redis

配置使用redis存储session数据

启动类增加@EnableRedisHttpSession开启spring-session 支持  好了完事