springboot-整合redis：做缓存，做分布式共享session

╰半橙微兮° 2022-04-16 03:18 234阅读 0赞

# springboot-整合redis：做缓存，做分布式共享session #

### 文章目录 ###

*  springboot-整合redis：做缓存，做分布式共享session
 *   *  1.redis应用场景
     *  2配置
     *  3.测试

完整代码下载链接：

[https://github.com/2010yhh/springBoot-demos/tree/master/springboot-redis][https_github.com_2010yhh_springBoot-demos_tree_master_springboot-redis]

**环境**

> idea2018，jdk1.8，
> 
> springboot版本：springboot1.5.9.RELEASE,

## 1.redis应用场景 ##

参见这篇

[**Redis的7个应用场景**][Redis_7]

## 2配置 ##

**pom需要：**

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <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>

**redis配置类：RedisConfig**

@Configuration
    @EnableCaching//开启缓存注解
    //maxInactiveIntervalInSeconds:session的统一过期时间,默认是1800秒过期，这里测试修改为60秒
    @EnableRedisHttpSession(maxInactiveIntervalInSeconds = 60)//注解，开启redis集中session管理
    public class RedisConfig {
        // 以下redisTemplate自由根据场景选择
        //默认的String-String
        //    @Bean
        public RedisTemplate RedisTemplate(RedisConnectionFactory factory) {
            StringRedisTemplate stringRedisTemplate = new StringRedisTemplate();
            stringRedisTemplate.setConnectionFactory(factory);
            return stringRedisTemplate;
        }
    
        @Bean
        public RedisTemplate<String, Object> RedisTemplate2(RedisConnectionFactory factory) {
            RedisTemplate<String, Object> template = new RedisTemplate<String, Object>();
            template.setConnectionFactory(factory);
            template.setKeySerializer(new StringRedisSerializer());
            //GenericJackson2JsonRedisSerializer方便反序列化，redis中也方便查看json
            template.setValueSerializer(new GenericJackson2JsonRedisSerializer());
            template.setHashKeySerializer(new GenericJackson2JsonRedisSerializer());
            template.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());
            template.afterPropertiesSet();
            return template;
        }
        @Bean
        public RedisTemplate<Object, Object> RedisTemplate3(RedisConnectionFactory factory) {
            RedisTemplate<Object, Object> template = new RedisTemplate<>();
            template.setConnectionFactory(factory);
            //使用Jackson2JsonRedisSerializer来序列化和反序列化redis的value值（默认使用JDK的序列化方式）
            Jackson2JsonRedisSerializer serializer = new Jackson2JsonRedisSerializer(Object.class);
    
            ObjectMapper mapper = new ObjectMapper();
            mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
            mapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
            serializer.setObjectMapper(mapper);
            //使用StringRedisSerializer来序列化和反序列化redis的key值
            template.setKeySerializer(new StringRedisSerializer());
            //使用Jackson2JsonRedisSerializer来序列化和反序列化redis的value值（默认使用JDK的序列化方式）
            template.setValueSerializer(serializer);
            // 设置hash key 和value序列化模式
            template.setHashKeySerializer(new StringRedisSerializer());
            template.setHashValueSerializer(serializer);
            template.afterPropertiesSet();
            return template;
        }
        /**
         * redis作为缓存
         * @param redisTemplate
         * @return
         */
        @Bean
        public CacheManager cacheManager(RedisTemplate<String, Object>  redisTemplate) {
            RedisCacheManager rcm = new RedisCacheManager(redisTemplate);
            // 多个缓存的名称,目前只定义了一个
            rcm.setCacheNames(Arrays.asList("user"));
            //设置缓存过期时间(秒)
            rcm.setDefaultExpiration(60);
            return rcm;
        }
    
        /**
         * 在springboot中使用spring-session的时候，
         * 在不同的域名下面需要配置cookie主域否则session共享不生效
         * @return
         */
        @Bean
        public CookieSerializer cookieSerializer() {
            DefaultCookieSerializer defaultCookieSerializer = new DefaultCookieSerializer();
            //cookie名字
            defaultCookieSerializer.setCookieName("sessionId");
            //不同子域时设置
            //defaultCookieSerializer.setDomainName("xxx.com");
            //设置各web应用返回的cookiePath一致
            defaultCookieSerializer.setCookiePath("/");
            return defaultCookieSerializer;
        }
    }

## 3.测试 ##

**3.1redis基本存储**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70]  
新增后：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 1]  
![在这里插入图片描述][20181116101145123.JPG]

**3.2redis结合db做缓存**

**1）多次查询结果（设置redis缓存过期时间1分钟：）**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 2]  
**2）插入后（设置redis缓存过期时间30s：）多次查询结果**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 3]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 4]  
**3）更新后（设置redis缓存过期时间1分钟：）多次查询结果**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 5]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 6]

**3.3redis做分布式session共享**  
**1）没有设置spring-session共享时：** 无法共享session  
![在这里插入图片描述][20181116102705732.jpg]  
![在这里插入图片描述][20181116102715331.jpg]

**2）设置了spring-session共享时：** 共享了session  
**[http://localhost:8090/testredis/][http_localhost_8090_testredis] 设置session**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 7]  
**[http://localhost:8090/testredis/][http_localhost_8090_testredis] get session**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 8]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 9]  
**[http://localhost:8091/testredis1/][http_localhost_8091_testredis1] get session**  
![在这里插入图片描述][20181116103344918.jpg]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 10]

[https_github.com_2010yhh_springBoot-demos_tree_master_springboot-redis]: https://github.com/2010yhh/springBoot-demos/tree/master/springboot-redis
[Redis_7]: https://www.cnblogs.com/NiceCui/p/7794659.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70]: /images/20220416/70e99f1f3b454b6c81ac9928f643540a.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 1]: /images/20220416/4a3671a2bc3c415db0433c969ff55655.png
[20181116101145123.JPG]: /images/20220416/304c19e9600c461ca9a36873ca9e025d.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 2]: /images/20220416/83caa0af7b634d11a48ca6109e0fffb1.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 3]: /images/20220416/4bdfe3ea06924cac9f2c0f691b680d50.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 4]: /images/20220416/594c38003c9945b89667ccbc83c3da60.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 5]: /images/20220416/f224dcdde9654384a9c23eb1f32aef6e.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 6]: /images/20220416/15c9abe0e5ce499f9fc7dfba4b2b6da5.png
[20181116102705732.jpg]: /images/20220416/07e3641e2f4744108a2c94f0e5366026.png
[20181116102715331.jpg]: /images/20220416/e7fb87922cec4c5e9c5276d232fa1d58.png
[http_localhost_8090_testredis]: http://localhost:8090/testredis/
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 7]: /images/20220416/f7621db7985441d39485d7699b136fad.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 8]: /images/20220416/89caea735be240928b9f3ab922079b14.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 9]: /images/20220416/92e0f6beb45d4a3eb1765ee5a03ac5c8.png
[http_localhost_8091_testredis1]: http://localhost:8091/testredis1/
[20181116103344918.jpg]: /images/20220416/77945c231ec44b3fbad810ca0058e872.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3loaHloaHloaHloaA_size_16_color_FFFFFF_t_70 10]: /images/20220416/605d05932de04b21867cadab63602682.png