1、基于SSM的Redis环境配置

前提是你的开发电脑安装和配置好了redis，若是没安装请看Window配置Redis环境和简单使用css

1.一、pom文件中引入redis客户端jar包（pom.xml）

<!-- https://mvnrepository.com/artifact/redis.clients/jedis -->
    <dependency>
      <groupId>redis.clients</groupId>
      <artifactId>jedis</artifactId>
      <version>2.9.0</version>
    </dependency>

1.二、redis属性配置文件（redis.properties）

#redis.host=127.0.0.1 redis.host=localhost redis.port=6379 redis.password=你的redis密码 redis.maxIdle=50 redis.maxTotal=100 redis.maxWaitMillis=3000 redis.testOnBorrow=true redis.timeout=5000

1.三、spring和redis的配置文件（spring-redis.xml）

指定了redis属性配置文件的路径html

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

    <util:properties id="redisConfig" location="classpath:/config/redis.properties"></util:properties>

    <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
        <property name="maxIdle" value="#{redisConfig['redis.maxIdle']}" />
        <property name="maxTotal" value="#{redisConfig['redis.maxTotal']}" />
        <property name="maxWaitMillis" value="#{redisConfig['redis.maxWaitMillis']}" />
        <property name="testOnBorrow" value="#{redisConfig['redis.testOnBorrow']}" />
    </bean>


    <bean id="jedisPool" class="redis.clients.jedis.JedisPool">

        <constructor-arg index="0" ref="jedisPoolConfig" />
        <!-- 端口，默认6379 -->
        <constructor-arg index="1" value="#{redisConfig['redis.host']}" name="host" type="java.lang.String"/>
        <constructor-arg index="2" value="#{redisConfig['redis.port']}"  name="port" type="int"/>
        <constructor-arg index="3" value="#{redisConfig['redis.timeout']}"  name="timeout" type="int"/>
        <constructor-arg index="4" value="#{redisConfig['redis.password']}"  name="password" type="java.lang.String"/>
    </bean>

</beans>

1.四、springmvc中引入Spring和redis的配置（spring-mvc.xml）

最下方利用import标签引入redis的配置文件java

<?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" xmlns:mvc="http://www.springframework.org/schema/mvc" 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-4.0.xsd
    http://www.springframework.org/schema/mvc
    http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
    <!-- 注解扫描包 -->
    <context:component-scan base-package="com.king.weixin"/>
    <!-- 开启注解 -->
    <mvc:annotation-driven/>
    <!-- 配置静态资源，直接映射到对应的文件夹，不被DispatcherServlet处理，3.04新增功能，须要从新设置spring-mvc-3.0.xsd -->
    <mvc:resources mapping="/img/**" location="/img/" />
    <mvc:resources mapping="/js/**" location="/js/" />
    <mvc:resources mapping="/css/**" location="/css/" />
    <mvc:resources mapping="/html/**" location="/html/" />
    <mvc:resources mapping="/tinymce/**" location="/tinymce/" />
    <mvc:resources mapping="/upload/**" location="/upload/" />
    <!-- 定义跳转的文件的先后缀 ，视图模式配置-->
    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- 这里的配置个人理解是自动给后面action的方法return的字符串加上前缀和后缀，变成一个 可用的url地址 -->
        <property name="prefix" value="/" />
        <property name="suffix" value=".jsp" />
    </bean>
    <!-- redis配置 -->
    <import resource="spring-redis.xml"/>
</beans>

2、测试和验证

采用jedis获取redis资源和操做redis，添加值而且给值设置生命周期web

public String addStringValue(String key, String value, int expireSeconds) { String result = null; Jedis jedis = null; try { jedis = jedisManager.getResource(); //result = jedis.set(key, value);
            result = jedis.set(key,value).toString(); if (expireSeconds != 0) { //EXPIRE key seconds 为给定 key 设置生存时间，当 key 过时时(生存时间为 0 )，它会被自动删除。
 jedis.expire(key, expireSeconds); } } catch (Exception e) { e.printStackTrace(); } finally { jedisManager.returnResource(jedis); } return result; }

获取值得生命周期方法，ttl (key)redis

public long getStringValueTTLByKey(String key){ long result = 0; Jedis jedis = null; try { jedis = jedisManager.getResource(); //Redis TTL 命令以秒为单位返回 key 的剩余过时时间。
            result  = jedis.ttl(key); } catch (Exception e) { e.printStackTrace(); } finally { jedisManager.returnResource(jedis); } return result; }

在命令行查看redis中的全部key值和剩余生命周期，以下图可使用keys * 查看全部缓存的key ，利用TTL key能够查看该key值对应对象的剩余生命周期spring