一、配置Redis开启

打开conf/redis.conf 文件，添加参数：notify-keyspace-events Ex

二、验证配置

• 步骤一：进入redis客户端：redis-cli
• 步骤二：执行 CONFIG GET notify-keyspace-events ，如果有返回值证明配置成功，如果没有执行步骤三
• 步骤三：执行CONFIG SET notify-keyspace-events "Ex"，再查看步骤二是否有值

三、两个类

package com.ciih.autopaddleGetway.config.redis;

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;

import javax.annotation.Resource;

@Configuration
public class RedisConfig {

    @Resource
    private RedisConnectionFactory redisConnectionFactory;
    @Resource
    private RedisKeyExpirationListener redisExpiredListener;

    @Bean
    public RedisMessageListenerContainer redisMessageListenerContainer() {
        RedisMessageListenerContainer redisMessageListenerContainer = new RedisMessageListenerContainer();
        redisMessageListenerContainer.setConnectionFactory(redisConnectionFactory);
        //监听所有key的过期事件
        redisMessageListenerContainer.addMessageListener(redisExpiredListener, redisExpiredListener.getTopic());
        return redisMessageListenerContainer;
    }

}

package com.ciih.autopaddleGetway.config.redis;

import lombok.Data;
import org.springframework.data.redis.connection.Message;
import org.springframework.data.redis.connection.MessageListener;
import org.springframework.data.redis.listener.PatternTopic;
import org.springframework.stereotype.Component;

@Data
@Component
public class RedisKeyExpirationListener implements MessageListener {
    //监听的主题(只监听redis数据库1，如果要监听redis所有的库，把1替换为*)
    public final PatternTopic topic = new PatternTopic("__keyevent@1__:expired");

    /**
     * Redis失效事件 key
     *
     * @param message
     * @param pattern
     */
    @Override
    public void onMessage(Message message, byte[] pattern) {
        String expiraKey = message.toString();
        System.out.println(expiraKey + "触发了失效事件！！！！");
        System.out.println();
    }
}