通过JedisConnectionFactory切换数据源（redis中的db0,db1...）

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该博客介绍了如何在Java应用中配置JedisConnectionFactory，以便根据需求动态选择连接不同的Redis数据库（如db0, db1等）。内容包括配置文件`redis.properties`和`applicationContext-redis.xml`的设置，以及在控制器中实现数据源切换的方法。" 106946793,8185307,本地开发环境：K3s、Traefik 2与Kubernetes集成实践,"['Kubernetes', 'K3s', 'Traefik', 'ingress控制器']

redis.properties

redis.maxTotal=200
redis.maxWaitMillis=1000
redis.timeout=3000
redis.testOnBorrow=true
redis.node1.host=127.0.0.1
redis.node1.port=6379
redis.dbIndex=1

applicationContext-redis.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
	<!-- 配置数据源 redis -->
    <!-- 配置JedisPoolConfig实例 -->
    <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
        <property name="maxTotal" value="${redis.maxTotal}" />
        <property name="maxWaitMillis" value="${redis.maxWaitMillis}" />
        <property name="testOnBorrow" value="${redis.testOnBorrow}" />
    </bean>
 
    <!-- 配置JedisConnectionFactory -->
    <bean id="jedisConnectionFactory"
        class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
        <property name="hostName" value="${redis.node1.host}" />
        <property name="port" value="${redis.node1.port}" />
        <property name="database" value="${redis.dbIndex}" />
        <property name="timeout" value="${redis.timeout}"></property>
        <property name="poolConfig" ref="poolConfig" />
    </bean>
    <!--redis操作模版,使用该对象可以操作redis  -->  
    <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate" >    
        <property name="connectionFactory" ref="jedisConnectionFactory" />    
        <!--如果不配置Serializer，那么存储的时候缺省使用String，如果用User类型存储，那么会提示错误User can't cast to String！！  -->    
        <property name="keySerializer" >    
            <bean class="org.springframework.data.redis.serializer.StringRedisSerializer" />    
        </property>    
        <property name="valueSerializer" >    
            <bean class="org.springframework.data.redis.serializer.StringRedisSerializer" />    
        </property>    
        <property name="hashKeySerializer">    
            <bean class="org.springframework.data.redis.serializer.StringRedisSerializer"/>    
        </property>    
        <property name="hashValueSerializer">    
            <bean class="org.springframework.data.redis.serializer.StringRedisSerializer"/>    
        </property>    
        <!--开启事务报错 资源不够  -->  
        <property name="enableTransactionSupport" value="false"></property>  
    </bean >
</beans>

controller:

```
@Autowired
	private RedisTemplate RedisTemplate;
	
	@Autowired
	private JedisConnectionFactory jedisConnectionFactory;
	@RequestMapping(value = "RedisDb", method = RequestMethod.GET, produces = "text/html;charset=UTF-8")
	@ResponseBody
	public String RedisDb(){
		//获取redis默认db1中的数据
		Object object = RedisTemplate.opsForValue().get("KW");
		System.out.println(object);
		//将db1切换到db0
		jedisConnectionFactory.setDatabase(0);
		Object object2 = RedisTemplate.opsForValue().get("CountAll");
		System.out.println(object2);
		return null;
	}