Springboot2.x 集成Redis

Springboot1.5–>2.x 版本升级

具体可查看

Redis缓存变动

1. 首先就是pom.xml导入依赖文件时由jedis

   <dependency>
         <groupId>redis.clients</groupId>
         <artifactId>jedis</artifactId>
       </dependency>	
   

   变更为lettuce-core：

   <dependency>
         <groupId>io.lettuce</groupId>
         <artifactId>lettuce-core</artifactId>
         <version>5.0.4.RELEASE</version>
         <scope>compile</scope>
       </dependency>									
   

Redis 的三个框架

2. 具体到RedisCacheConfiguration配置类中，由Spingboot1.5的

@ConditionalOnBean(RedisTemplate.class)

​ 变更为Springboot2.x的

@ConditionalOnClass(RedisConnectionFactory.class)
@ConditionalOnBean(RedisConnectionFactory.class)

3. 因为1的原因 ，在RedisAutoConfigurationn中，将注解@ConditionalOnClass中的加在Jedis的部分删去了，取而代之的是用

@ConditionalOnClass(RedisOperations.class)
@Import({ LettuceConnectionConfiguration.class, JedisConnectionConfiguration.class })

代替，而RedisOperations.class 其实就是RedisTemplate(RedisTemplate/StringRedisTemplate)本身。

示例代码

   @Bean(name = "userRedisTemplate")
    public RedisTemplate<Object, User> userRedisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, User> template = new RedisTemplate<>();
        template.setConnectionFactory(redisConnectionFactory);
        Jackson2JsonRedisSerializer<User> userJackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(User.class);
        template.setDefaultSerializer(userJackson2JsonRedisSerializer);
        return template;
    }
    @Bean
    public RedisCacheManager userRedisCacheManager(RedisConnectionFactory redisConnectionFactory){
         RedisCacheManager.RedisCacheManagerBuilder builder = RedisCacheManager.builder(redisConnectionFactory);
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()))
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new Jackson2JsonRedisSerializer<>(User.class)));
        RedisCacheManager cacheManager = RedisCacheManager.builder(redisConnectionFactory).cacheDefaults(config).build();
        return cacheManager;
    }

Github

demo