Spring集成Jedis（不依赖spring-data-redis）（单机/集群模式）（待实践）

Jedis是Redis的Java客户端，Spring将Jedis连接池作为一个Bean来配置。如果在Spring Data的官网上可以发现，Spring Data Redis已经将Jedis集成进去了。

Jedis连接池分为两种：

一种是“redis.clients.jedis.ShardedJedisPool”，这是基于hash算法的一种分布式集群Redis客户端连接池。

另一种是“redis.clients.jedis.JedisPool”，这是单机环境适用的Redis连接池。

下面是介绍详细的集成方式：

POM：

    <!-- Redis依赖包 -->    <dependency>      <groupId>redis.clients</groupId>      <artifactId>jedis</artifactId>      <version>2.9.0</version>    </dependency>

ShardedJedisPool是Redis集群客户端的对象池，可以通过他来操作ShardedJedis，下面是ShardedJedisPool的XML配置，spring-jedis.xml：

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       xmlns:context="http://www.springframework.org/schema/context"       xsi:schemaLocation="http://www.springframework.org/schema/beans       http://www.springframework.org/schema/beans/spring-beans.xsd       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">    <!-- 引入jedis的properties配置文件 -->    <!--如果你有多个数据源需要通过<context:property-placeholder管理，且不愿意放在一个配置文件里，那么一定要加上ignore-unresolvable=“true"-->    <context:property-placeholder location="classpath:properties/redis.properties" ignore-unresolvable="true" />    <!--shardedJedisPool的相关配置-->    <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">        <!--新版是maxTotal，旧版是maxActive-->        <property name="maxTotal">            <value>${redis.pool.maxActive}</value>        </property>        <property name="maxIdle">            <value>${redis.pool.maxIdle}</value>        </property>        <property name="testOnBorrow" value="true"/>        <property name="testOnReturn" value="true"/>    </bean>    <bean id="shardedJedisPool" class="redis.clients.jedis.ShardedJedisPool"  scope="singleton">        <constructor-arg index="0" ref="jedisPoolConfig" />        <constructor-arg index="1">            <list>                <bean class="redis.clients.jedis.JedisShardInfo">                    <constructor-arg name="host" value="${redis.uri}" />                </bean>            </list>        </constructor-arg>    </bean></beans>

下面是单机环境下Redis连接池的配置：

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       xmlns:context="http://www.springframework.org/schema/context"       xsi:schemaLocation="http://www.springframework.org/schema/beans       http://www.springframework.org/schema/beans/spring-beans.xsd       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">    <!-- 引入jedis的properties配置文件 -->    <!--如果你有多个数据源需要通过<context:property-placeholder管理，且不愿意放在一个配置文件里，那么一定要加上ignore-unresolvable=“true"-->    <context:property-placeholder location="classpath:properties/redis.properties" ignore-unresolvable="true" />    <!--Jedis连接池的相关配置-->    <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">        <!--新版是maxTotal，旧版是maxActive-->        <property name="maxTotal">            <value>${redis.pool.maxActive}</value>        </property>        <property name="maxIdle">            <value>${redis.pool.maxIdle}</value>        </property>        <property name="testOnBorrow" value="true"/>        <property name="testOnReturn" value="true"/>    </bean>    <bean id="jedisPool" class="redis.clients.jedis.JedisPool">        <constructor-arg name="poolConfig" ref="jedisPoolConfig" />        <constructor-arg name="host" value="${redis.host}" />        <constructor-arg name="port" value="${redis.port}" type="int" />        <constructor-arg name="timeout" value="${redis.timeout}" type="int" />        <constructor-arg name="password" value="${redis.password}" />        <constructor-arg name="database" value="${redis.database}" type="int" />    </bean></beans>

对应的classpath:properties/redis.properties为：

#最大分配的对象数redis.pool.maxActive=200#最大能够保持idel状态的对象数redis.pool.maxIdle=50redis.pool.minIdle=10redis.pool.maxWaitMillis=20000#当池内没有返回对象时，最大等待时间redis.pool.maxWait=300#格式：redis://:[密码]@[服务器地址]:[端口]/[db index]redis.uri = redis://:12345@127.0.0.1:6379/0redis.host = 127.0.0.1redis.port = 6379redis.timeout=30000redis.password = 12345redis.database = 0

二者操作代码类似，都是先注入连接池，然后通过连接池获得Jedis实例，通过实例对象操作Redis。

ShardedJedis操作：

    @Autowired    private ShardedJedisPool shardedJedisPool;//注入ShardedJedisPool    @RequestMapping(value = "/demo_set",method = RequestMethod.GET)    @ResponseBody    public String demo_set(){        //获取ShardedJedis对象        ShardedJedis shardJedis = shardedJedisPool.getResource();        //存入键值对        shardJedis.set("key1","hello jedis");        //回收ShardedJedis实例        shardJedis.close();        return "set";    }    @RequestMapping(value = "/demo_get",method = RequestMethod.GET)    @ResponseBody    public String demo_get(){        ShardedJedis shardedJedis = shardedJedisPool.getResource();        //根据键值获得数据        String result = shardedJedis.get("key1");        shardedJedis.close();        return result;    }

Jedis操作：

    @Autowired    private JedisPool jedisPool;//注入JedisPool    @RequestMapping(value = "/demo_set",method = RequestMethod.GET)    @ResponseBody    public String demo_set(){        //获取ShardedJedis对象        Jedis jedis = jedisPool.getResource();        //存入键值对        jedis.set("key2","hello jedis one");        //回收ShardedJedis实例        jedis.close();        return "set";    }    @RequestMapping(value = "/demo_get",method = RequestMethod.GET)    @ResponseBody    public String demo_get(){        Jedis jedis = jedisPool.getResource();        //根据键值获得数据        String result = jedis.get("key2");        jedis.close();        return result;    }