@EnableCaching
@Configuration
public class RedisConfig extends CachingConfigurerSupport {

    /**
     * 自定义生成key的规则
     * 缓存对象集合中，缓存是以 key-value 形式保存的。
     * 当不指定缓存的key时，springboot会使用 SimpleKeyGenerator 生成 key
     *
     * @return
     */
    @Override
    @Bean
    public KeyGenerator keyGenerator() {
        return new KeyGenerator() {
            @Override
            public Object generate(Object target, Method method, Object... params) {
                //格式化缓存 key 字符串
                StringBuilder sb = new StringBuilder();
                //追加类名
                sb.append(target.getClass().getName());
                //追加方法名
                sb.append(method.getName());
                //遍历参数并且追加
                for (Object obj : params) {
                    sb.append(obj.toString());
                }
                System.out.println("调用Redis缓存key：" + sb.toString());
                return sb.toString();
            }
        };
    }

    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate<String, Object>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashKeySerializer(jackson2JsonRedisSerializer);
        redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }


    @Bean
    public CacheManager cacheManager(RedisConnectionFactory factory) {
        RedisSerializer<String> redisSerializer = new StringRedisSerializer();
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);
        //配置序列化
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();
        RedisCacheConfiguration redisCacheConfiguration = config.serializeKeysWith(
                RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer)).serializeValuesWith(
                RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer));
        RedisCacheManager cacheManager = RedisCacheManager.builder(factory).cacheDefaults(
                redisCacheConfiguration.entryTtl(Duration.ofMinutes(5))).build();
        return cacheManager;
    }


}