springboot连接redis并动态切换database的实现方法
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
@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); } }
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); } 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
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