一、Maven依赖

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.1.RELEASE</version>
</parent>
<dependencies>
    <!-- 集成commons工具类 -->
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-lang3</artifactId>
    </dependency>
    <!-- 集成lombok 框架 -->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
    </dependency>
    <!-- fastjson -->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.30</version>
    </dependency>
    <!-- SpringBoot-整合Web组件 -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-redis</artifactId>
    </dependency>
</dependencies>
<!-- 管理依赖 -->
<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Finchley.M7</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

二、工具类

package com.demo.utils;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import java.util.concurrent.TimeUnit;

/**
 * @Author: JYC
 * @Title: RedisUtils
 * @Description: TODO
 * @Date: 2022/4/27 16:29
 */
@Component
public class RedisUtils {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    public void setString(String key, String value) {
        setString(key, value, null);
    }

    public void setString(String key, String value, Long timeOut) {
        stringRedisTemplate.opsForValue().set(key, value);
        if (timeOut != null) {
            stringRedisTemplate.expire(key, timeOut, TimeUnit.SECONDS);
        }
    }

    public String getString(String key) {
        return stringRedisTemplate.opsForValue().get(key);
    }
}

三、控制层

package com.demo.controller;

import com.alibaba.fastjson.JSONObject;
import com.demo.entity.UserEntity;
import com.demo.utils.RedisUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @Author: JYC
 * @Title: RedisController
 * @Description: TODO
 * @Date: 2022/4/27 16:34
 */
@RestController
public class RedisController {
    @Autowired
    private RedisUtils redisUtils;

    @RequestMapping("/setRedis")
    public void setRedisKey(UserEntity userEntity) {
        redisUtils.setString("userEntity", JSONObject.toJSONString(userEntity));
    }

    @RequestMapping("/getRedis")
    public UserEntity setRedisKey() {
        String userEntityJson = redisUtils.getString("userEntity");
        UserEntity userEntity = JSONObject.parseObject(userEntityJson, UserEntity.class);
        return userEntity;
    }
}

四、配置文件

spring:
  redis:
    host: 192.168.1.100
    password: root
    port: 6379