JAVA连接redis实现存取数据

1、导入依赖

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

<dependency>
    <groupId>org.springframework.session</groupId>
    <artifactId>spring-session-data-redis</artifactId>
</dependency>
<!-- lettuce pool 缓存连接池-->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-pool2</artifactId>
</dependency>

2、配置文件application.yml

spring:
  redis:
    host: 主机地址
    port: 主机redis端口号
    lettuce:
      pool:
        max-active: 8
        max-wait: -1
        max-idle: 8
        min-idle: 0
    password: 连接密码

3、redis配置RedisConfig.java

import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
@Configuration
@EnableCaching
public class RedisConfig {
          
   
    /**
     * 配置自定义redisTemplate
     * @return
     */
    @Bean
    RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
          
   
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        // 设置值（value）的序列化采用Jackson2JsonRedisSerializer。
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        // 设置键（key）的序列化采用StringRedisSerializer。
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashKeySerializer(new StringRedisSerializer());
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }

}

4、测试代码

增删改查：

@RunWith(SpringRunner.class)
@SpringBootTest
public class RedisTests {
          
   
    @Autowired
    RedisTemplate redisTemplate;
    /**
     * @param key      redis键
     * @param value    redis值
     * @param timeout  过期时间（ex:TimeUnit.MINUTES分钟）
     * @param timeUnit 时间单位
     */
    @Test
    public void setKeyValue(){
          
   
        ValueOperations<Serializable,Object> operations=redisTemplate.opsForValue();
        operations.set(key,value);
        boolean b =redisTemplate.expire(key,timeout,timeUnit);
        System.out.println(b);
    }
    /**
    *按主键删除
    */
    @Test
    public void deleteByKey(){
          
   
        ValueOperations<Serializable,Object> operations=redisTemplate.opsForValue();

        boolean b=redisTemplate.delete("name123");
        System.out.println(b);
    }
    //修改相当于重新插入，代码同样
    
    //按键来查询
    @Test
    public void searchByKey(){
          
   
        ValueOperations<Serializable,Object> operations=redisTemplate.opsForValue();
        String str=(String)operations.get("name123");
        System.out.println(str);
    }
}