Jedis+spring集成

jedis，redis的java客户端实现，对外调用的类只需要了解Jedis,JedisPool,JedisPoolConfig,JedisSharedInfo,ShardedJedisPool,ShardedJedis即可满足基本的使用，其中带shared的类是实现分片连接池的类（适用Redis集群）。

下面通过spring的容器来整合jedis，通过spring的整合能更简洁灵活的配置jedis。

Client：http://redis.io/clients

源码：https://github.com/xetorthio/jedis

实现过程：

1、maven引入jar

spring的jar

略

jedis的jar：

<dependency>    <groupId>redis.clients</groupId>    <artifactId>jedis</artifactId>    <version>2.0.0</version></dependency> 

2、spring-redis.xml

需要spring管理的两个类JedisPoolConfig和JedisPool

redis连接池的配置

redis连接池

<?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:p="http://www.springframework.org/schema/p"xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-3.0.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-3.0.xsd">     <context:annotation-config />    <context:component-scan base-package="com.akk" />        <!-- 加载redis配置文件 --><context:property-placeholder location="classpath:redis.properties" ignore-unresolvable="true"/>  <!-- redis连接池的配置 -->    <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">          <property name="maxIdle" value="${redis.maxIdle}" />          <property name="maxActive" value="${redis.maxActive}" />          <property name="maxWait" value="${redis.maxWait}" />          <property name="testOnBorrow" value="${redis.testOnBorrow}" />      </bean>          <!-- redis的连接池pool -->    <bean id = "jedisPool" class="redis.clients.jedis.JedisPool" destroy-method="destroy"><constructor-arg index="0" ref="jedisPoolConfig" /><constructor-arg index="1" value="${redis.host}"/><constructor-arg index="2" value="${redis.port}" type="int"/><constructor-arg index="3" value="${redis.timeout}" type="int"/><!-- <constructor-arg index="4" value="${redis.pass}"/> -->    </bean>    </beans>

redis.properties

# Redis settingsredis.host=127.0.0.1redis.port=6379redis.timeout=3000#redis.pass= redis.maxIdle=300redis.maxActive=600redis.maxWait=1000redis.testOnBorrow=true

3、web.xml

<?xml version="1.0" encoding="UTF-8" ?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"id="WebApp_ID" version="2.5"><display-name>Archetype Created Web Application</display-name> <!-- 读取spring配置文件 --><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:conf/spring-redis.xml</param-value></context-param><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener> <!-- springMVC核心配置 --><servlet><servlet-name>appServlet</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:conf/spring-mvc.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>appServlet</servlet-name><url-pattern>/</url-pattern></servlet-mapping> <!-- session timeout --><session-config><session-timeout>30</session-timeout></session-config> </web-app>

4、JedisUtil

jedis公共类，封装对redis操作的方法

package com.akk.redis.util; import javax.management.RuntimeErrorException; import org.apache.log4j.Logger;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Component; import redis.clients.jedis.Jedis;import redis.clients.jedis.JedisPool;import redis.clients.jedis.Transaction; import com.alibaba.dubbo.common.utils.Assert; @Componentpublic class JedisUtil{ private static Logger logger= Logger.getLogger(JedisUtil.class);       @Autowired    private JedisPool jedisPool; public static final int EXPIRE = 5 * 60;public static final String LOCKED = "TRUE";/** * 从redis连接池取得实例 * @return */public Jedis getJedis() {Jedis jedis;jedis = jedisPool.getResource();return jedis;}/** * 释放redis回连接池 * @param jedis */public void releaseJedis(Jedis jedis) {if (jedis != null) {jedisPool.returnResource(jedis);}}/** * 获取key的value * @param key * @return */public String getCacheValue(String key) {        String string = new String();            try {                Assert.notNull(this, "jedisUtil 为空");                Jedis jedis = this.getJedis();                string = jedis.get(key);                System.out.println("key:"+string);                this.releaseJedis(jedis);            } catch (Exception e) {                logger.error("in get redis key="+ key, e);            }        return string;    }/** * 更新key的value * @param key * @param value * @return */    public int updateCache(String key, String value) {        try {            Assert.notNull(this, "jedisUtil 为空");            Jedis jedis = this.getJedis();            String result = jedis.set(key, value) ;            this.releaseJedis(jedis);        } catch (Exception e) {            logger.error("in update redis key="+ key, e);        }        return 1;    }        /**     * 删除key的value     * @param key     * @return     */    public int removeCache(String key) {        try {            Assert.notNull(this, "jedisUtil 为空");            Jedis jedis = this.getJedis();            long result = jedis.del(key) ;            this.releaseJedis(jedis);        } catch (Exception e) {            logger.error("in del redis key="+ key, e);        }        return 1;    }        /**     * 带事务+watch 的更新方法     * @param key     * @param value     */    public void updateWatchKey(String key,String value) {        try {    Jedis jedis = this.getJedis();    //watch key    jedis.watch(key);    //取得key的value    value = jedis.get(key);    if (value == null || value.equals("UNLOCK")) {    //开启事务    Transaction tx = jedis.multi();    //设置key,value；EXPIRE为key的过期时间    tx.setex(key, EXPIRE, LOCKED);    //提交事务，并判断    if(null == tx.exec()){    this.releaseJedis(jedis);    throw new RuntimeException("key："+key+"更新失败");    }    }else{    this.releaseJedis(jedis);    throw new RuntimeException("key："+key+"更新失败");    }    this.releaseJedis(jedis);        } catch (Error e) {            throw new RuntimeErrorException(e);        }}}

5、RedisController

最后是springmvc的controller

package com.akk.controller; import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod; import com.akk.redis.util.JedisUtil; @Controllerpublic class RedisController {@Autowiredprivate JedisUtil jedisUtil; /** *  * @param str * @return * @throws InterruptedException */@RequestMapping(value="/redis", method={RequestMethod.POST,RequestMethod.GET})public String redis(String str) throws InterruptedException{ //用户idString userId="11";//奖品类型String rewardType="77";//用户+奖品String key = userId+rewardType;try {String getReward = jedisUtil.getCacheValue(key);    if(null == getReward || getReward.equals("")){    System.out.println("start-on");    jedisUtil.updateWatchKey(key, "on");System.out.println("on");    }else{    System.out.println("not null");    }} catch (Exception e) {System.out.println(e.getMessage());}return "index";}}•

总结