1.相关概念

Springboot学习笔记：https://blog.csdn.net/meini32/article/details/132544107
Redis快速入门：https://blog.csdn.net/meini32/article/details/132666283

2.环境搭建及测试

redis相关配置

SpringBoot中的配置
https://blog.csdn.net/weixin_41003771/article/details/102663355

1.引入坐标

		<dependency>
			<groupId>redis.clients</groupId>
			<artifactId>jedis</artifactId>
		</dependency>

		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.50</version>
		</dependency>

2.配置文件

#redis
redis.host=192.168.33.10
redis.port=6379
redis.timeout=3
redis.password=123456
redis.poolMaxTotal=10
redis.poolMaxIdle=10
redis.poolMaxWait=3

3.redis配置类

@Data
@ConfigurationProperties(prefix = "redis")
@Component

//对应配置文件中的名
public class RedisConfig {
    private String host;
    private int port;
    private int timeout;
    private String password;
    private int poolMaxTotal;
    private int poolMaxIdle;
    private int poolMaxWait;
}

4.redis连接池

//创建一个JedisPool，该对象是用于管理Redis连接的池。
@Service
public class RedisPoolFactory {

    @Autowired
    RedisConfig redisConfig;

    @Bean
    public JedisPool JedisPoolFactory(){
        JedisPoolConfig poolConfig = new JedisPoolConfig();
        poolConfig.setMaxIdle(redisConfig.getPoolMaxIdle());
        poolConfig.setMaxTotal(redisConfig.getPoolMaxTotal());
        poolConfig.setMaxWaitMillis(redisConfig.getPoolMaxWait() * 1000);
        JedisPool jp = new JedisPool(poolConfig, redisConfig.getHost(), redisConfig.getPort(),
                redisConfig.getTimeout()*1000, redisConfig.getPassword(), 0);
        return jp;
    }
}

5.redis服务（操作）

//Spring Boot服务，专门用于与Redis数据库进行交互
@Service
public class RedisService {

    @Autowired
    JedisPool jedisPool;

    /**
     * 获取当个对象
     * */
    public <T> T get(String key,Class<T> clazz) {
        Jedis jedis = null;
        try {
            jedis =  jedisPool.getResource();
            //生成真正的key
            String realKey  = key;
            String  str = jedis.get(realKey);
            if(!StringUtils.isEmpty(str)) {
                T t = stringToBean(str, clazz);
                return t;
            }

            return  null;
        }finally {
            returnToPool(jedis);
        }
    }

    /**
     * 设置对象
     * */
    public <T> boolean set(String key,  T value) {
        return setex( key,  value, 0);
    }

    /**
     * 设置对象 带缓存时间
     * */
    public <T> boolean setex(String key,  T value , int seconds) {
        Jedis jedis = null;
        try {
            jedis =  jedisPool.getResource();
            String str = beanToString(value);
            if(str == null || str.length() <= 0) {
                return false;
            }
            //生成真正的key
            String realKey  = key;
            if(seconds <= 0) {
                jedis.set(realKey, str);
            }else {
                jedis.setex(realKey, seconds, str);
            }
            return true;
        }finally {
            returnToPool(jedis);
        }
    }

    /**
     * 判断key是否存在
     * */
    public <T> boolean exists(String key) {
        Jedis jedis = null;
        try {
            jedis =  jedisPool.getResource();
            //生成真正的key
            String realKey  = key;
            return  jedis.exists(realKey);
        }finally {
            returnToPool(jedis);
        }
    }

    /**
     * 增加值
     * */
    public <T> Long incr(String key) {
        Jedis jedis = null;
        try {
            jedis =  jedisPool.getResource();
            //生成真正的key
            String realKey  = key;
            return  jedis.incr(realKey);
        }finally {
            returnToPool(jedis);
        }
    }

    /**
     * 减少值
     * */
    public <T> Long decr(String key) {
        Jedis jedis = null;
        try {
            jedis =  jedisPool.getResource();
            //生成真正的key
            String realKey  =  key;
            return  jedis.decr(realKey);
        }finally {
            returnToPool(jedis);
        }
    }

    private <T> String beanToString(T value) {
        if(value == null) {
            return null;
        }
        Class<?> clazz = value.getClass();
        if(clazz == int.class || clazz == Integer.class) {
            return ""+value;
        }else if(clazz == String.class) {
            return (String)value;
        }else if(clazz == long.class || clazz == Long.class) {
            return ""+value;
        }else {
            return JSON.toJSONString(value);
        }
    }

    @SuppressWarnings("unchecked")
    private <T> T stringToBean(String str, Class<T> clazz) {
        if(str == null || str.length() <= 0 || clazz == null) {
            return null;
        }
        if(clazz == int.class || clazz == Integer.class) {
            return (T)Integer.valueOf(str);
        }else if(clazz == String.class) {
            return (T)str;
        }else if(clazz == long.class || clazz == Long.class) {
            return  (T)Long.valueOf(str);
        }else {
            return JSON.toJavaObject(JSON.parseObject(str), clazz);
        }
    }

    private void returnToPool(Jedis jedis) {
        if(jedis != null) {
            jedis.close();
        }
    }

}

6.测试

测试一下添加和查看

@SpringBootTest
public class RedisServiceTest {

    @Autowired
    private RedisService redisService;

    @Test
    void testRedisInteraction() {
        // 设置一个键值对
        redisService.set("testKey", "testValue");

        // 获取并打印这个值
        String value = (String) redisService.get("testKey",String.class);
        System.out.println(value);
        assertEquals("testValue", value);

    }
}

测试结果

控制台输出

到redis中查看是否有这个键值对