一、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,如果没安装请看Window配置Redis环境和简单使用
1.1、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.</version>
</dependency>
1.2、redis属性配置文件(redis.properties)
#redis.host=127.0.0.1
redis.host=localhost
redis.port=
redis.password=你的redis密码
redis.maxIdle=
redis.maxTotal=
redis.maxWaitMillis=
redis.testOnBorrow=true
redis.timeout=
1.3、spring和redis的配置文件(spring-redis.xml)
指定了redis属性配置文件的路径
<?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="" ref="jedisPoolConfig" />
<!-- 端口,默认6379 -->
<constructor-arg index="" value="#{redisConfig['redis.host']}" name="host" type="java.lang.String"/>
<constructor-arg index="" value="#{redisConfig['redis.port']}" name="port" type="int"/>
<constructor-arg index="" value="#{redisConfig['redis.timeout']}" name="timeout" type="int"/>
<constructor-arg index="" value="#{redisConfig['redis.password']}" name="password" type="java.lang.String"/>
</bean> </beans>
1.4、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
<?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,.04新增功能,需要重新设置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/" />
<!-- 定义跳转的文件的前后缀 ,视图模式配置-->
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- 这里的配置我的理解是自动给后面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>
二、测试和验证
采用jedis获取redis资源和操作redis,添加值并且给值设置生命周期
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 != ) {
//EXPIRE key seconds 为给定 key 设置生存时间,当 key 过期时(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)
public long getStringValueTTLByKey(String key){ long result = ;
Jedis jedis = null;
try { jedis = jedisManager.getResource();
//Redis TTL 命令以秒为单位返回 key 的剩余过期时间。
result = jedis.ttl(key); } catch (Exception e) {
e.printStackTrace();
} finally {
jedisManager.returnResource(jedis);
}
return result; }
在命令行查看redis中的所有key值和剩余生命周期,如下图可以使用keys * 查看所有缓存的key ,利用TTL key可以查看该key值对应对象的剩余生命周期