引入依赖

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<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
    <version>2.9.0</version>
</dependency>

application.yml配置Redis

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spring:
  redis:
    database: 0
    host: 121.41.222.106
    password: 667866
    port: 6379

Redis监听配置类

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package com.ledao.config;

import com.ledao.listener.KeyExpiredListener;
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;

/**
 * Redis监听过期的key
 *
 * @author LeDao
 * @company
 * @create 2022-03-02 2:04
 */
@Configuration
public class RedisConfig {

    @Resource
    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());
    }
}

过期key监听类

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package com.ledao.listener;

import org.springframework.data.redis.connection.Message;
import org.springframework.data.redis.listener.KeyExpirationEventMessageListener;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;

import java.util.Date;

/**
 * 过期key监听类
 *
 * @author LeDao
 * @company
 * @create 2022-03-02 2:09
 */
public class KeyExpiredListener extends KeyExpirationEventMessageListener {

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

    @Override
    public void onMessage(Message message, byte[] pattern) {
        System.out.println(new Date() + ": 过期的key为" + message.toString());
    }
}

Jedis工具类

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package com.ledao.util;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

import java.util.List;

/**
 * Redis工具类
 *
 * @author LeDao
 * @company
 * @create 2022-01-17 1:21
 */
public class RedisUtil {

    private static final String HOST = "121.41.222.106";
    private static final Integer PORT = 6379;
    private static final String AUTH_PASSWORD = "667866";

    /**
     * 获取Redis连接
     *
     * @return
     */
    private static JedisPool getRedisLink() {
        JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
        jedisPoolConfig.setMaxTotal(100);
        jedisPoolConfig.setMaxIdle(10);
        return new JedisPool(jedisPoolConfig, HOST, PORT);
    }

    /**
     * 关闭Redis连接
     *
     * @param jedisPool
     * @param jedis
     */
    private static void closeRedis(JedisPool jedisPool, Jedis jedis) {
        jedis.close();
        jedisPool.close();
    }

    /**
     * 获取Jedis
     *
     * @param jedisPool
     * @return
     */
    private static Jedis getJedis(JedisPool jedisPool) {
        Jedis jedis = jedisPool.getResource();
        jedis.auth(AUTH_PASSWORD);
        return jedis;
    }
    
    /**
     * 设置key
     *
     * @param key
     * @param value
     * @return
     */
    public static boolean setKey(String key, String value) {
        JedisPool jedisPool = getRedisLink();
        Jedis jedis = getJedis(jedisPool);
        String result = jedis.set(key, value);
        closeRedis(jedisPool, jedis);
        return "OK".equals(result);
    }

    /**
     * 给指定key设置过期时间(秒)
     *
     * @param key
     * @param seconds
     */
    public static void setKeyTime(String key, int seconds) {
        JedisPool jedisPool = getRedisLink();
        Jedis jedis = getJedis(jedisPool);
        jedis.expire(key, seconds);
        closeRedis(jedisPool,jedis);
    }
}

请求的方法

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@ResponseBody
@RequestMapping("/setRedisKey")
public String setRedisKey(){
    RedisUtil.setKey("a", "1");
    RedisUtil.setKeyTime("a", 10);
    System.out.println(new Date()+": "+"设置了key,过期时间为"+10+"秒");
    return "设置成功";
}

测试

浏览器通过请求http://localhost/setRedisKey链接创建一个名为a的key，并给它设置10秒的过期时间

2022-03-02 025638