@Cacheable的使用

SpringBoot 缓存之 @Cacheable 详细介绍
https://blog.csdn.net/zl1zl2zl3/article/details/110987968

@Cacheable设置过期时间
https://blog.csdn.net/weixin_41860719/article/details/125226096

成功的demo

class TtlRedisCacheManager(cacheWriter: RedisCacheWriter?, defaultCacheConfiguration: RedisCacheConfiguration?) :
    RedisCacheManager(cacheWriter!!, defaultCacheConfiguration!!) {
    override fun createRedisCache(name: String, cacheConfig: RedisCacheConfiguration?): RedisCache {
        var name: String? = name
        var cacheConfig = cacheConfig
        val cells: Array<String> = StringUtils.delimitedListToStringArray(name, "=")
        name = cells[0]
        if (cells.size > 1) {
            val ttl = cells[1].toLong()
            // 根据传参设置缓存失效时间，默认单位是秒
            cacheConfig = cacheConfig!!.entryTtl(Duration.ofSeconds(ttl))
        }
        return super.createRedisCache(name, cacheConfig)
    }
}

  /**
   * 自定义RedisCacheManager，用于在使用@Cacheable时设置ttl
   */
  @Bean
  fun selfCacheManager(redisConnectionFactory: RedisConnectionFactory?): RedisCacheManager? {
      val redisCacheWriter = RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory!!)
      val redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig()
          .serializeValuesWith(SerializationPair.fromSerializer(GenericJackson2JsonRedisSerializer(objectMapper)))
      return TtlRedisCacheManager(redisCacheWriter, redisCacheConfiguration)
  }

    @Cacheable(value = ["default=60"], key = "#token", unless = "#result == null",cacheManager = "selfCacheManager")
    fun getSession(token: String): SysUserSession? {
        val session = sysUserSessionMapper.selectById(token)
        return checkToken(session)
    }