之前一篇已经写过了《springboot中redis的使用和分布式session共享问题》，但是示例不完全，本文加以完善。
使用spring-session-data-redis解决session共享，而不需要再引入其他jar即可
集成简单，上手迅速。

项目结构

1.png

pom

<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"><parent><artifactId>easy-boot</artifactId><groupId>com.mos</groupId><version>1.0-SNAPSHOT</version></parent><modelVersion>4.0.0</modelVersion><artifactId>easy-boot-web</artifactId><packaging>jar</packaging><name>easy-boot-web</name><url>http://maven.apache.org</url><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-configuration-processor</artifactId><version>${spring-boot.version}</version></dependency><!--redis配置开始--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-redis</artifactId></dependency><dependency><groupId>org.springframework.session</groupId><artifactId>spring-session-data-redis</artifactId></dependency><!--redis配置结束--><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version><scope>test</scope></dependency></dependencies>
</project>

配置

package com.mos.easyboot.web.config;import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport {@Beanpublic CacheManager cacheManager(RedisTemplate<?,?> redisTemplate) {CacheManager cacheManager = new RedisCacheManager(redisTemplate);return cacheManager;}@Beanpublic RedisTemplate<String, String> redisTemplate(RedisConnectionFactory factory) {RedisTemplate<String, String> redisTemplate = new RedisTemplate<>();redisTemplate.setConnectionFactory(factory);return redisTemplate;}
}

package com.mos.easyboot.web.config;import org.springframework.context.annotation.Configuration;
import org.springframework.session.data.redis.config.annotation.web.http.EnableRedisHttpSession;@Configuration
@EnableRedisHttpSession
public class RedisSessionConfig {
}

properties配置

server.port=8881# Redis数据库索引（默认为0）
spring.redis.database=0
# Redis服务器地址
spring.redis.host=192.168.48.2
# Redis服务器连接端口
spring.redis.port=6379
# Redis服务器连接密码（默认为空）
spring.redis.password=123456789
# 连接池最大连接数（使用负值表示没有限制）
spring.redis.pool.max-active=8
# 连接池最大阻塞等待时间（使用负值表示没有限制）
spring.redis.pool.max-wait=-1
# 连接池中的最大空闲连接
spring.redis.pool.max-idle=8
# 连接池中的最小空闲连接
spring.redis.pool.min-idle=0
# 连接超时时间（毫秒）
spring.redis.timeout=0

测试

编写测试controller

package com.mos.easyboot.web.controller;import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import javax.servlet.http.HttpSession;@RestController
@RequestMapping("demo")
public class DemoController {@RequestMapping("index")public String index(HttpSession session){session.setAttribute("sessionId",session.getId());session.setAttribute("sessionUserId","123");return "test";}@RequestMapping("session")public String session(HttpSession session){String sessionId = session.getAttribute("sessionId").toString();String sessionUserId = session.getAttribute("sessionUserId").toString();return sessionId + "^" +  sessionUserId;}
}

分别启动两个项目，先访问http://localhost:8881/demo/index
再访问http://localhost:8881/demo/session
新打开一个浏览器tab，访问http://localhost:8882/demo/session
最终效果如下（可以看到两个请求获取到的sessionId和session内容都相同，实现session共享）：

7.png