spring boot+redis如何實(shí)現(xiàn)監(jiān)聽過期Key的方法

 <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-data-redis</artifactId>
  </dependency>

spring:
 #redis
 redis:
 database: 0
 host: 127.0.0.1
 password: redis_123456
 port: 6379

notify-keyspace-events "Ex"

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.data.redis.connection.Message;
import org.springframework.data.redis.listener.KeyExpirationEventMessageListener;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;
 
import java.nio.charset.StandardCharsets;
 
/**
 * @program: SpringCloud
 * @description: redis Key過期監(jiān)聽
 * @author: zhang yi
 * @create: 2020-03-24 14:14
 */
public class KeyExpiredListener extends KeyExpirationEventMessageListener {
 
 public KeyExpiredListener(RedisMessageListenerContainer listenerContainer) {
  super(listenerContainer);
 }
 
 @Override
 public void onMessage(Message message, byte[] pattern) {
  System.out.println("過期key:" + message.toString());
 }
}

import com.zy.rabbitmq.base.Listener.KeyExpiredListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;
 
/**
 * @program: SpringCloud
 * @description: redis配置類
 * @author: zhang yi
 * @create: 2020-03-24 14:17
 */
@Configuration
public class RedisConfiguration {
 
 @Autowired
 private RedisConnectionFactory redisConnectionFactory;
 
 @Bean
 public RedisMessageListenerContainer redisMessageListenerContainer() {
  RedisMessageListenerContainer redisMessageListenerContainer = new RedisMessageListenerContainer();
  redisMessageListenerContainer.setConnectionFactory(redisConnectionFactory);
  return redisMessageListenerContainer;
 }
 
 @Bean
 public KeyExpiredListener keyExpiredListener() {
  return new KeyExpiredListener(this.redisMessageListenerContainer());
 }
 
}

import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;
 
import javax.annotation.Resource;
import java.util.concurrent.TimeUnit;
/**
 * redis 工具類
 * @Author ZhangYi
 */
@Component
public class RedisUtil {
 
	@Resource
	private RedisTemplate<String, Object> redisTemplate;
 
	/**
	 * 指定緩存失效時(shí)間
	 * 
	 * @param key 鍵
	 * @param time 時(shí)間(秒)
	 * @return
	 */
	public boolean expire(String key, long time) {
		try {
			if (time > 0) {
				redisTemplate.expire(key, time, TimeUnit.SECONDS);
			}
			return true;
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
	}
 
	/**
	 * 根據(jù)key 獲取過期時(shí)間
	 * 
	 * @param key 鍵 不能為null
	 * @return 時(shí)間(秒) 返回0代表為永久有效
	 */
	public long getExpire(String key) {
		return redisTemplate.getExpire(key, TimeUnit.SECONDS);
	}
 
	/**
	 * 判斷key是否存在
	 * 
	 * @param key 鍵
	 * @return true 存在 false不存在
	 */
	public boolean hasKey(String key) {
		try {
			return redisTemplate.hasKey(key);
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
	}
 
	/**
	 * 刪除緩存
	 * 
	 * @param key 可以傳一個(gè)值 或多個(gè)
	 */
	@SuppressWarnings("unchecked")
	public void del(String... key) {
		if (key != null && key.length > 0) {
			if (key.length == 1) {
				redisTemplate.delete(key[0]);
			} else {
				redisTemplate.delete(CollectionUtils.arrayToList(key));
			}
		}
	}
 
	// ============================String=============================
	/**
	 * 普通緩存獲取
	 * 
	 * @param key 鍵
	 * @return 值
	 */
	public Object get(String key) {
		return key == null &#63; null : redisTemplate.opsForValue().get(key);
	}
 
	/**
	 * 普通緩存放入
	 * 
	 * @param key 鍵
	 * @param value 值
	 * @return true成功 false失敗
	 */
	public boolean set(String key, Object value) {
		try {
			redisTemplate.opsForValue().set(key, value);
			return true;
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
 
	}
 
	/**
	 * 普通緩存放入并設(shè)置時(shí)間
	 * 
	 * @param key 鍵
	 * @param value 值
	 * @param time 時(shí)間(秒) time要大于0 如果time小于等于0 將設(shè)置無限期
	 * @return true成功 false 失敗
	 */
	public boolean set(String key, Object value, long time) {
		try {
			if (time > 0) {
				redisTemplate.opsForValue().set(key, value, time, TimeUnit.SECONDS);
			} else {
				set(key, value);
			}
			return true;
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
	}
}

@GetMapping("/put")
 public String demo(){
  redisUtil.set("name","zhangyi",10);
  return "aaa";
 }
 
 @GetMapping("/get")
 public Map<String,Object> get(){
  Map<String,Object> m =new HashMap<>();
  m.put("time",redisUtil.getExpire("name"));
  m.put("val",redisUtil.get("name"));
  return m;
 }