问题现象

在参考网上的Redis集成后，配置了RedisTemplate的序列化，配置成功后@Cacheable注解的缓存仍然是jdk的序列化，配置无效。

参考配置的类似代码：

java">@Bean("redisTemplate")
public  RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory connectionFactory) {
        RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(connectionFactory);

        var jackson2JsonRedisSerializer = getJackson2JsonRedisSerializer();

        // 设置value的序列化规则和key的序列化规则
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashKeySerializer(new StringRedisSerializer());
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }
public static GenericJackson2JsonRedisSerializer getJackson2JsonRedisSerializer() {
        var jackson2JsonRedisSerializer = new GenericJackson2JsonRedisSerializer();
        jackson2JsonRedisSerializer.configure(objectMapper -> {
            // add java8 time module
            objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
            objectMapper.activateDefaultTyping(new LaissezFaireSubTypeValidator(),
                    ObjectMapper.DefaultTyping.EVERYTHING);
            JavaTimeModule javaTimeModule = new JavaTimeModule();
            objectMapper.registerModule(javaTimeModule);
        });
        return jackson2JsonRedisSerializer;
    }

问题原因

@Cacheable未使用RedisTemplate，所以操作无效。他使用的是CacheManager

问题解决

配置CacheManager即可。

我们可以使用 RedisCacheManagerBuilderCustomizer 来自定义CacheManager

java">public class MyRedisCacheManagerBuilderSerialCustomizer implements RedisCacheManagerBuilderCustomizer {
    @Override
    public void customize(RedisCacheManager.RedisCacheManagerBuilder builder) {
        RedisSerializer<String> stringRedisSerializer = new StringRedisSerializer();

        var jackson2JsonRedisSerializer = getJackson2JsonRedisSerializer();
        var configuration = builder.cacheDefaults()
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(stringRedisSerializer))
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer));

        builder.cacheDefaults(configuration);
        var configuredCaches = builder.getConfiguredCaches();

        // 针对有的缓存存在自定义配置的情况，读取所有缓存的配置，设置序列化方法
        for (String configuredCache : configuredCaches) {
            var cacheConfig = builder.getCacheConfigurationFor(configuredCache);
            cacheConfig.ifPresent(config -> {
                var newConfig = config.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(stringRedisSerializer))
                        .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer));
                builder.withCacheConfiguration(configuredCache, newConfig);
            });
        }
    }
}