初用redis缓存

一线码农

2015-12-18

srping 集成 redis

pom文件：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>redis</groupId>
    <artifactId>redis</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <build>
    </build>
    <dependencies>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-redis</artifactId>
            <version>1.0.2.RELEASE</version>
        </dependency>
    </dependencies>
</project>

spring 配置文件代码：

<?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"
xmlns:util="http://www.springframework.org/schema/util" xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.1.xsd
http://www.springframework.org/schema/beans  http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd">

<!--注解说明 -->
<context:annotation-config />
<!-- 把标记了@Controller注解的类转换为bean -->
<context:component-scan base-package="com.test.**" />
<!-- redis工厂 -->
<bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
    p:host-name="192.168.0.124" p:port="6379" p:password="123456" />
<!-- redis服务封装 -->
<bean id="redisService" class="com.test.redis.RedisService">
</bean>

或者这样将spring和redis集成

spring 配置文件：

<?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"  
    xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"  
    xmlns:aop="http://www.springframework.org/schema/aop"  
    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">  
  
    <context:property-placeholder location="classpath:redis.properties" />  
  
    <bean id="poolConfig" 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>  
      
    <bean id="connectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"  
        p:host-name="${redis.host}" p:port="${redis.port}" p:password="${redis.pass}"  p:pool-config-ref="poolConfig"/>  
      
    <bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">  
        <property name="connectionFactory"   ref="connectionFactory" />  
    </bean>         
      
    <bean id="userDao" class="com.x.dao.impl.UserDao" />   
</beans>

redis.properties：

# Redis settings  
redis.host=localhost  
redis.port=6379  
redis.pass=java2000_wl  
  
  
redis.maxIdle=300  
redis.maxActive=600  
redis.maxWait=1000  
redis.testOnBorrow=true

redisService：

package com.test.redis;import java.util.Set;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.factory.annotation.Qualifier;import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;import redis.clients.jedis.Jedis;publicclassRedisService{/**
     * 通过key删除（字节）
     * @param key
     */publicvoiddel(byte[] key){this.getJedis().del(key);}/**
     * 通过key删除
     * @param key
     */publicvoiddel(String key){this.getJedis().del(key);}/**
     * 添加key value 并且设置存活时间(byte)
     * @param key
     * @param value
     * @param liveTime
     */publicvoidset(byte[] key,byte[] value,int liveTime){this.set(key, value);this.getJedis().expire(key, liveTime);}/**
     * 添加key value 并且设置存活时间
     * @param key
     * @param value
     * @param liveTime
     */publicvoidset(String key,String value,int liveTime){this.set(key, value);this.getJedis().expire(key, liveTime);}/**
     * 添加key value
     * @param key
     * @param value
     */publicvoidset(String key,String value){this.getJedis().set(key, value);}/**添加key value (字节)(序列化)
     * @param key
     * @param value
     */publicvoidset(byte[] key,byte[] value){this.getJedis().set(key, value);}/**
     * 获取redis value (String)
     * @param key
     * @return
     */publicStringget(String key){String value =this.getJedis().get(key);return value;}/**
     * 获取redis value (byte [] )(反序列化)
     * @param key
     * @return
     */publicbyte[]get(byte[] key){returnthis.getJedis().get(key);}/**
     * 通过正则匹配keys
     * @param pattern
     * @return
     */publicSet<String> keys(String pattern){returnthis.getJedis().keys(pattern);}/**
     * 检查key是否已经存在
     * @param key
     * @return
     */publicboolean exists(String key){returnthis.getJedis().exists(key);}/**
     * 清空redis 所有数据
     * @return
     */publicString flushDB(){returnthis.getJedis().flushDB();}/**
     * 查看redis里有多少数据
     */publiclong dbSize(){returnthis.getJedis().dbSize();}/**
     * 检查是否连接成功
     * @return
     */publicString ping(){returnthis.getJedis().ping();}/**
     * 获取一个jedis 客户端
     * @return
     */privateJedis getJedis(){if(jedis ==null){return jedisConnectionFactory.getShardInfo().createResource();}return jedis;}privateRedisService(){}//操作redis客户端privatestaticJedis jedis;@Autowired@Qualifier("jedisConnectionFactory")privateJedisConnectionFactory jedisConnectionFactory;}

public static void main(String[] args) throws InterruptedException {
        ApplicationContext app = new ClassPathXmlApplicationContext("classpath:spring-context.xml");
        //这里已经配置好,属于一个redis的服务接口
        RedisService redisService = (RedisService) app.getBean("redisService");

        String ping = redisService.ping();//测试是否连接成功,连接成功输出PONG
        System.out.println(ping);

        //首先,我们看下redis服务里是否有数据
        long dbSizeStart = redisService.dbSize();
        System.out.println(dbSizeStart);

        redisService.set("username", "oyhk");//设值(查看了源代码,默认存活时间30分钟)
        String username = redisService.get("username");//取值 
        System.out.println(username);
        redisService.set("username1", "oyhk1", 1);//设值,并且设置数据的存活时间(这里以秒为单位)
        String username1 = redisService.get("username1");
        System.out.println(username1);
        Thread.sleep(2000);//我睡眠一会,再去取,这个时间超过了,他的存活时间
        String liveUsername1 = redisService.get("username1");
        System.out.println(liveUsername1);//输出null

        //是否存在
        boolean exist = redisService.exists("username");
        System.out.println(exist);

        //查看keys
        Set<String> keys = redisService.keys("*");//这里查看所有的keys
        System.out.println(keys);//只有username username1(已经清空了)

        //删除
        redisService.set("username2", "oyhk2");
        String username2 = redisService.get("username2");
        System.out.println(username2);
        redisService.del("username2");
        String username2_2 = redisService.get("username2");
        System.out.println(username2_2);//如果为null,那么就是删除数据了

        //dbsize
        long dbSizeEnd = redisService.dbSize();
        System.out.println(dbSizeEnd);

        //清空reids所有数据
        //redisService.flushDB();
    }

redis xmlns xsd schema context