前言：

             简单搭建web项目，使用技术包括：SpringBoot、MyBatis Plus、Redis

Maven依赖

<!-- mybatis-plus依赖 -->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.1.1</version>
</dependency>
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.1.9</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.11</version>
</dependency>

       <!-- redis -->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>3.3.0</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-redis</artifactId>
            <version>2.2.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-pool2</artifactId>
            <version>2.6.1</version>
        </dependency>

        <dependency>
           <groupId>com.alibaba</groupId>
           <artifactId>fastjson</artifactId>
           <version>1.2.68</version>
       </dependency>

配置application.properties

编写Redis配置类RedisSourceConfig

package com.wwy.configuraion;

import com.wwy.api.RedisSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.*;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.connection.jedis.JedisSentinelConnection;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import org.springframework.stereotype.Component;
import redis.clients.jedis.JedisPoolConfig;

import java.util.HashSet;
import java.util.List;
import java.util.Set;

@Configuration
public class RedisSourceConfig {

    // 多个哨兵
    @Value("#{'${redis.sentinel.nodes}'.split(',')}")
    private List<String> nodes;

    @Value("${redis.host}")
    private String host;

    @Value("${redis.port}")
    private String port;

    @Value("${redis.db}")
    private String db;

    @Autowired
    private RedisTemplate redisTemplate;
    
    // 配置链接池信息
    @Bean
    public JedisPoolConfig poolConfig() {
        JedisPoolConfig poolConfig = new JedisPoolConfig();
        poolConfig.setMaxIdle(8);
        poolConfig.setMaxTotal(8);
        poolConfig.setBlockWhenExhausted(true);
        poolConfig.setMaxWaitMillis(30000);
        poolConfig.setTestOnBorrow(true);
        poolConfig.setTestOnReturn(true);
        poolConfig.setTimeBetweenEvictionRunsMillis(1200000);
        poolConfig.setMinEvictableIdleTimeMillis(1800000);
        return poolConfig;
    }

    // 哨兵模式配置 （如果没有用哨兵，请注释）
    @Bean
    public RedisSentinelConfiguration redisSentinelConfiguration(){
        RedisSentinelConfiguration sentinel = new RedisSentinelConfiguration();
        sentinel.setMaster("mymaster");
        Set<RedisNode> sentinels = new HashSet<>();
        nodes.forEach(li ->{
            li.toString().split(":");
            // 多个哨兵
            sentinels.add(new RedisNode(li.split(":")[0],Integer.parseInt(li.split(":")[1])));
        });

        sentinel.setSentinels(sentinels);

        return sentinel;
    }
    
    // Redis链接工厂
    @Bean
    public JedisConnectionFactory jedisConnectionFactory(JedisPoolConfig jedisPoolConfig) {
        // 方式一：使用哨兵模式（根据具体情况，选择其中一种即可，可看JedisConnectionFactory 源码，有多种链接方式，如Cluster Redis集群等）
        JedisConnectionFactory jedisFactory = new                JedisConnectionFactory(redisSentinelConfiguration(),jedisPoolConfig);// 配置哨兵
        // Redis哨兵搭建可参考：         https://www.cnblogs.com/maybesuch/p/10257374.html     
        // 方式二：在这没有使用哨兵模式，可以理解为单机根据具体情况，选择其中一种即可，可看JedisConnectionFactory 源码，有多种链接方式，如Cluster Redis集群等）
        //JedisConnectionFactory jedisFactory = new JedisConnectionFactory(); 

        // 工厂链接信息
        jedisFactory.setPoolConfig(jedisPoolConfig);
        //jedisFactory.setHostName(host); // 配置哨兵无需设置
        //jedisFactory.setPort(Integer.parseInt(port)); // 配置哨兵无需设置
        //jedisFactory.setPassword("redis@20191210"); // 在这我是本地，没有设置密码
        jedisFactory.setUsePool(true);
        jedisFactory.setDatabase(Integer.parseInt(db));
        return jedisFactory;
    }


    // 封装Redis的各种操作，如果没有写此方法，在使用private RedisTemplate<String, Object> redisTemplate;会注入失败的

    @Bean
    public RedisTemplate<String, Object> stringSerializerRedisTemplate() {
        RedisSerializer<String> stringSerializer = new StringRedisSerializer();
        redisTemplate.setKeySerializer(stringSerializer);
        redisTemplate.setValueSerializer(stringSerializer);
        redisTemplate.setHashKeySerializer(stringSerializer);
        redisTemplate.setHashValueSerializer(stringSerializer);
        return redisTemplate;
    }
}

Redis key过期事件监听，配置RedisListenerConfig

1、修改redis server 配置文件，开启keyt过期听通知配置

2、redis监听配置

3、单独全库redis key过期处理

4、监听redis某个库的过期key，此种方式需要在第2步中的配置中进行配置