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一、下载安装并启动redis

看这篇博客的第二点：https://blog.csdn.net/m0_45234510/article/details/106504401

注意：启动后不要关闭，启动项目时需要保持redis一直打开

二、springboot项目整合redis

1、pom.xml引入redis依赖

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

2、在application.properties中加入配置

spring.redis.host=localhost
spring.redis.port=6379
spring.redis.database=0

3、新建RedisCache.java

• RedisCache.java

package com.travel.travels.cache;

import com.travel.travels.utils.ApplicationContextUtils;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.cache.Cache;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.StringRedisSerializer;

@Slf4j
public class RedisCache implements Cache {

    private String id;

    public RedisCache(String id){
        log.info("当前的缓存id: [{}]",id);
        this.id = id;
    }

    @Override
    public String getId() {
        return this.id;
    }

    @Override //放入redis缓存
    public void putObject(Object key, Object value) {
        log.info("放入缓存的key:[{}] 放入缓存的valus:[{}]",key,value);
        getRedisTemplate().opsForHash().put(id,key.toString(),value);
    }

    @Override//从redis缓存获取
    public Object getObject(Object key) {
        log.info("取出的缓存的key:[{}] ",key.toString());
        return getRedisTemplate().opsForHash().get(id,key.toString());
    }

    @Override//删除指定缓存
    public Object removeObject(Object o) {
        return null;
    }

    @Override  //清除缓存
    public void clear() {
        log.info("清除所有缓存信息...");
        getRedisTemplate().delete(id);
    }

    @Override
    public int getSize() {
        return getRedisTemplate().opsForHash().size(id).intValue();
    }

    //封装获取redistemplate的方法
    public RedisTemplate getRedisTemplate(){
        RedisTemplate redisTemplate = (RedisTemplate) ApplicationContextUtils.getBean("redisTemplate");
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashKeySerializer(new StringRedisSerializer());
        return redisTemplate;
    }
}

4、新建工具类ApplicationContextUtils.java

• ApplicationContextUtils.java

package com.travel.travels.utils;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component // //注意:需要添加这个注解
public class ApplicationContextUtils implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;
    }

    public static Object getBean(String name){
        return applicationContext.getBean(name);
    }
}

5、在实体类中实现Serializable接口

implements Serializable

6、在对应的Mapper.xml中绑定redis

   <cache type="com.travel.travels.cache.RedisCache"/>

7、启动项目

注意：需要提前打开redis！

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推荐文章：
redis学习
springboot+mybatis+vue实战——旅游网站(一) 完成登录注册、验证码、省份增删改查功能