springboot连接redis并动态切换database

柔情只为你懂 2022-06-02 05:53 312阅读 0赞

# springboot连接redis并动态切换database #

> 众所周知，redis多有个db，在jedis中可以使用select方法去动态的选择redis的database，但在springboot提供的StringRedisTemplate中确，没有该方法，好在StringRedisTemplate预留了一个setConnectionFactory方法，本文主为通过修改ConnectionFactory从而达到动态切换database的效果。

## springboot连接redis ##

pom.xml文件中引入spring-boot-starter-redis,版本可自行选择

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

application.properties

#redis配置
    spring.redis.database=0
    spring.redis.host=127.0.0.1
    spring.redis.port=6379
    spring.redis.password=pwd
    spring.redis.timeout=0
    spring.redis.pool.max-active=8
    spring.redis.pool.max-idle=8
    spring.redis.pool.max-wait=-1
    spring.redis.pool.min-idle=0

TestCRedis.java

运行TestCRedis.t1(),控制台打印“testvalue”redis连接成功

## redis动态切换database ##

首先使用redis-cli,在redis的0、1、2三个库中，分别设置test 的值，分别为;0、1、2

TestCRedis.java

@RunWith(SpringJUnit4ClassRunner.class)
    @SpringBootTest(classes = Application.class)
    public class TestCRedis{ 
    
        protected static Logger LOGGER = LoggerFactory.getLogger(TestCRedis.class);
    
        @Autowired
        private StringRedisTemplate stringRedisTemplate;
    
        @Test
        public void t1(){
            ValueOperations<String, String> stringStringValueOperations = stringRedisTemplate.opsForValue();
            stringStringValueOperations.set("testkey","testvalue");
            String testkey = stringStringValueOperations.get("testkey");
            LOGGER.info(testkey);
        }
    
        @Test
        public void t2() {
            for (int i = 0; i <= 2; i++) {
                JedisConnectionFactory jedisConnectionFactory = (JedisConnectionFactory) stringRedisTemplate.getConnectionFactory();
                jedisConnectionFactory.setDatabase(i);
                stringRedisTemplate.setConnectionFactory(jedisConnectionFactory);
                ValueOperations valueOperations = stringRedisTemplate.opsForValue();
                String test = (String) valueOperations.get("test");
                LOGGER.info(test);
            }
        }
    
    }

运行TestCRedis.t2(),控制台分别打印 “0、1、2”，database切换成功