再談session共享

之前一篇已經寫過了《 springboot中redis的使用和分布式session共享問題》

，但是示例不完全，本文加以完善。

使用spring-session-data-redis解決session共享，而不需要再引入其他jar即可

內建簡單，上手迅速。

項目結構

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配置開始-->
        <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配置結束-->
        <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 {

    @Bean
    public CacheManager cacheManager(RedisTemplate<?,?> redisTemplate) {
        CacheManager cacheManager = new RedisCacheManager(redisTemplate);
        return cacheManager;
    }

    @Bean
    public 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資料庫索引（預設為0）
spring.redis.database=0
# Redis伺服器位址
spring.redis.host=192.168.48.2
# Redis伺服器連接配接端口
spring.redis.port=6379
# Redis伺服器連接配接密碼（預設為空）
spring.redis.password=123456789
# 連接配接池最大連接配接數（使用負值表示沒有限制）
spring.redis.pool.max-active=8
# 連接配接池最大阻塞等待時間（使用負值表示沒有限制）
spring.redis.pool.max-wait=-1
# 連接配接池中的最大空閑連接配接
spring.redis.pool.max-idle=8
# 連接配接池中的最小空閑連接配接
spring.redis.pool.min-idle=0
# 連接配接逾時時間（毫秒）
spring.redis.timeout=0
           

測試

編寫測試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;
    }
}

           

分别啟動兩個項目，先通路 http://localhost:8881/demo/index 再通路 http://localhost:8881/demo/session 新打開一個浏覽器tab，通路 http://localhost:8882/demo/session 最終效果如下（可以看到兩個請求擷取到的sessionId和session内容都相同，實作session共享）：

7.png