redis db0到db15

可以理解为数据库表这是redis默认提供的16个表
我们可以把不同的数据存在不同的db上
取得时候可以在不同的db拿到不同类型数据

springboot连接redis

pom.xml文件中引入spring-boot-starter-redis,

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-redis</artifactId><version>1.3.8.RELEASE</version>
</dependency>

添加配置文件application.properties

# Redis数据库索引（默认为0）
spring.redis.database=0  
# Redis服务器地址
spring.redis.host=localhost
# Redis服务器连接端口
spring.redis.port=6379  
# Redis服务器连接密码（默认为空）
spring.redis.password=
# 连接池最大连接数（使用负值表示没有限制） 默认 8
spring.redis.lettuce.pool.max-active=8
# 连接池最大阻塞等待时间（使用负值表示没有限制） 默认 -1
spring.redis.lettuce.pool.max-wait=-1
# 连接池中的最大空闲连接 默认 8
spring.redis.lettuce.pool.max-idle=8
# 连接池中的最小空闲连接 默认 0
spring.redis.lettuce.pool.min-idle=0

测试是否连接成功

@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = Application.class)
public class TestCRedis{protected static Logger LOGGER = LoggerFactory.getLogger(TestCRedis.class);@Autowiredprivate StringRedisTemplate stringRedisTemplate;@Testpublic void t1(){ValueOperations<String, String> stringStringValueOperations = stringRedisTemplate.opsForValue();stringStringValueOperations.set("test","大湿胸");String testkey = stringStringValueOperations.get("test");LOGGER.info(testkey);}}

运行TestCRedis.t1(),控制台打印“大湿胸”redis连接成功

redis动态切换database

package com.niceteam.web.bm;import com.niceteam.common.excel.ExcelDownloadUtil;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.test.context.junit4.SpringRunner;import javax.annotation.Resource;@RunWith(SpringRunner.class)
@SpringBootTest
public class NiceteamWebBasemanagerApplicationTests {private static Logger log = LoggerFactory.getLogger(ExcelDownloadUtil.class);@Autowiredprivate StringRedisTemplate stringRedisTemplate;@Testpublic void contextLoads() {for (int i = 0; i <= 2; i++) {LettuceConnectionFactory lettuceConnectionFactory = (LettuceConnectionFactory) stringRedisTemplate.getConnectionFactory();lettuceConnectionFactory.setDatabase(i);stringRedisTemplate.setConnectionFactory(lettuceConnectionFactory);lettuceConnectionFactory.resetConnection();ValueOperations valueOperations = stringRedisTemplate.opsForValue();valueOperations.set(i+"",i+"");String test = (String) valueOperations.get(i+"");log.info(test);System.out.println("拿到的数据"+test);}}}