redis 默認使用 jdk 序列化，需要我們配置序列化機制，自定義一個配置類，否則存入的數據顯示亂碼

@EnableCaching //開啟緩存 @Configuration public class MyCacheConfig {@Beanpublic RedisCacheConfiguration redisCacheConfiguration(){RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();//指定鍵和值的序列化機制config = config.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()));config = config.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()));return config;} }

使用以上配置后，雖然亂碼的問題解決了，但配置文件又不生效了，比如過期時間等，這是因為在初始化時會判斷用戶是否自定義了配置文件，如果自定義了，原來的就不會生效，源碼如下：

private org.springframework.data.redis.cache.RedisCacheConfigurationdetermineConfiguration(ClassLoader classLoader) {//如果配置了，就返回自定義的配置if (this.redisCacheConfiguration != null) {return this.redisCacheConfiguration;}//沒配置使用默認的配置Redis redisProperties = this.cacheProperties.getRedis();org.springframework.data.redis.cache.RedisCacheConfiguration config = org.springframework.data.redis.cache.RedisCacheConfiguration.defaultCacheConfig();config = config.serializeValuesWith(SerializationPair.fromSerializer(new JdkSerializationRedisSerializer(classLoader)));if (redisProperties.getTimeToLive() != null) {config = config.entryTtl(redisProperties.getTimeToLive());}if (redisProperties.getKeyPrefix() != null) {config = config.prefixKeysWith(redisProperties.getKeyPrefix());}if (!redisProperties.isCacheNullValues()) {config = config.disableCachingNullValues();}if (!redisProperties.isUseKeyPrefix()) {config = config.disableKeyPrefix();}return config; }

所以，我們也需要手動獲取 ttl、prefix 等屬性，直接仿照源碼就行，將配置類修改為如下：

@EnableCaching //開啟緩存 @Configuration @EnableConfigurationProperties(CacheProperties.class) //緩存的所有配置屬性都在這個類里 public class MyCacheConfig {@Beanpublic RedisCacheConfiguration redisCacheConfiguration(CacheProperties cacheProperties) {//獲取默認配置RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();//指定鍵和值的序列化機制config = config.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()));config = config.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()));//獲取配置文件的配置CacheProperties.Redis redisProperties = cacheProperties.getRedis();if (redisProperties.getTimeToLive() != null) {config = config.entryTtl(redisProperties.getTimeToLive());}if (redisProperties.getKeyPrefix() != null) {config = config.prefixKeysWith(redisProperties.getKeyPrefix());}if (!redisProperties.isCacheNullValues()) {config = config.disableCachingNullValues();}if (!redisProperties.isUseKeyPrefix()) {config = config.disableKeyPrefix();}return config;} }

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