直接上代码

@Slf4j
@Configuration
@EnableCaching //启用缓存
public class RedisConfig {
 
	/**
	 * 自定义缓存管理器
	 */
	@Bean
	public RedisCacheManager cacheManager(RedisConnectionFactory factory) {
		RedisCacheConfiguration config =            RedisCacheConfiguration.defaultCacheConfig();

		Set cacheNames = new HashSet<>();
		cacheNames.add("car");
		cacheNames.add("distributor");

		ConcurrentHashMap configMap = new ConcurrentHashMap<>();
        //有效期6分钟自定义缓存时间
		configMap.put("car", config.entryTtl(Duration.ofMinutes(6L)));
        //永久 key1 的有效期是永久的
		configMap.put("distributor", config);
		//需要先初始化缓存名称，再初始化其它的配置。
		RedisCacheManager cacheManager = RedisCacheManager.
				builder(factory).initialCacheNames(cacheNames).
				withInitialCacheConfigurations(configMap)
				.build();
		return cacheManager;
	}
} 


@Override
@Cacheable(cacheNames = {"distributor"}, key = "key1")
public List findCities() {
    return distributorMapper.selectCities();
} 
@Override
@Cacheable(cacheNames = {"car"}, key = "key2")
public List findCities() {
    return distributorMapper.selectCities();
} 

转载：https://zhuanlan.zhihu.com/p/338718644