<!-- redis 緩存操作 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

# redis 配置
redis:
  # 地址
  host: localhost
  # 端口，默認(rèn)為6379
  port: 6379
  # 數(shù)據(jù)庫索引
  database: 0
  # 密碼
  password:
  # 連接超時(shí)時(shí)間
  timeout: 10s
  lettuce:
    pool:
      # 連接池中的最小空閑連接
      min-idle: 0
      # 連接池中的最大空閑連接
      max-idle: 8
      # 連接池的最大數(shù)據(jù)庫連接數(shù)
      max-active: 8
      # #連接池最大阻塞等待時(shí)間（使用負(fù)值表示沒有限制）
      max-wait: -1ms

@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport
{
    
    /**
     * redis key 過期事件訂閱需要
     * @param redisConnectionFactory
     * @return
     */
    @Bean
    public RedisMessageListenerContainer redisMessageListenerContainer(RedisConnectionFactory redisConnectionFactory) {
        RedisMessageListenerContainer container = new RedisMessageListenerContainer();
        container.setConnectionFactory(redisConnectionFactory);
        return container;
    }
}

@Component
public class RedisKeyExpirationListener extends KeyExpirationEventMessageListener {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    public RedisKeyExpirationListener(RedisMessageListenerContainer listenerContainer) {
        super(listenerContainer);
    }

    @Override
    public void onMessage(Message message, byte[] pattern) {
        //注意：只能獲取失效的key值，獲取不到key對應(yīng)的value值的。
        String expireKey = message.toString();
        try {
            if (!StringUtils.isEmpty(expireKey)) {
            	//具體處理邏輯......
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}