1 修改 redis.conf配置文件：
K Keyspace events, published with keyspace@ prefix事件
E Keyevent events, published with keyevent@ prefix
g Generic commands (non-type specific) like DEL, EXPIRE, RENAME, …
$ String commands
l List commands
s Set commands
h Hash commands
z Sorted set commands
x Expired events (events generated every time a key expires)
e Evicted events (events generated when a key is evicted for maxmemory)
A Alias for g$lshzxe, so that the “AKE” string means all the events.
redis.conf 的默認的配置是：notify-keyspace-events ""
我們需要改為：notify-keyspace-events Ex
即對應上面的鍵的過期事件。修改玩這個重啟一下redis
2 客戶端來監聽redis的過期事件：
@Configuration
public class RedisListenerConfig {
@Bean
RedisMessageListenerContainer container(RedisConnectionFactory connectionFactory) {
RedisMessageListenerContainer container = new RedisMessageListenerContainer();
container.setConnectionFactory(connectionFactory);
return container;
}
}
3.書寫一個監聽器
@Slf4j
@Component
public class RedisKeyExpirationListener extends KeyExpirationEventMessageListener {
public RedisKeyExpirationListener(RedisMessageListenerContainer listenerContainer) {
super(listenerContainer);
}
@Override
public void onMessage(Message message, byte[] pattern) {
String expiredKey = message.toString();
log.info("expiredKey========="+expiredKey);
}
4.查詢方法中隨便加了兩個表中的不同id，一個30s,一個27s。
redisUtil.set("UserId"+user.get(0).getId(),user.get(0).getId(),30);
redisUtil.set("UserInfoId"+userInfo.get(0).getId(),userInfo.get(0).getId(),27);
控制台輸出：
需要注意的是：
過期監聽消息中返回的是，過期的鍵的key值，是沒有返回value的
