Cache系列：spring-cache簡單三步快速應用ehcache3.x-jcache緩存（spring4.x）

前言：本項目基於spring4.x構建，使用ehcache3.5.2和JCache(jsr107規範)

1、依賴

    除了ehcache和cache-api外，注意引用spring-context-support

                    
                    <dependency>
                        <groupId>org.springframework</groupId>
                        <artifactId>spring-context-support</artifactId>
                        <version>4.3.16.RELEASE</version>
                    </dependency>
		    <dependency>
		        <groupId>org.ehcache</groupId>
		        <artifactId>ehcache</artifactId>
		        <version>3.5.2</version>
		    </dependency>
		    <dependency>
		        <groupId>javax.cache</groupId>
		        <artifactId>cache-api</artifactId>
		        <version>1.0.0</version>
		    </dependency>

2、配置

一、ehcache配置

<?xml version="1.0" encoding="UTF-8"?>
<ehcache:config
    xmlns:ehcache="http://www.ehcache.org/v3"
    xmlns:jcache="http://www.ehcache.org/v3/jsr107">

  <ehcache:service>
    <jcache:defaults>
      <jcache:cache name="default" template="myDefaultTemplate"/>
    </jcache:defaults>
  </ehcache:service>

  <ehcache:cache alias="allCameraCache">
    <ehcache:key-type copier="org.ehcache.impl.copy.SerializingCopier">java.lang.String</ehcache:key-type>
    <ehcache:value-type copier="org.ehcache.impl.copy.SerializingCopier">java.lang.String</ehcache:value-type>
    <ehcache:expiry>
      <ehcache:tti unit="minutes">20</ehcache:tti><!-- 數據過時時間20分鐘 -->
    </ehcache:expiry>
    <ehcache:heap unit="entries">200</ehcache:heap><!-- 最多緩存200個對象 -->
  </ehcache:cache>

<!-- 使用模板，能夠覆蓋模板的屬性 -->
  <ehcache:cache alias="cameraCache" uses-template="myDefaultTemplate">
    <ehcache:key-type>java.lang.Object</ehcache:key-type>
    <ehcache:value-type>java.lang.Object</ehcache:value-type>
	<ehcache:expiry>
      <ehcache:tti unit="minutes">30</ehcache:tti><!-- 數據過時時間30分鐘，覆蓋模板默認屬性 -->
    </ehcache:expiry>
    <ehcache:heap unit="entries">500</ehcache:heap><!-- 最多緩存500個對象 -->
  </ehcache:cache>
  
  <!-- 默認模板 -->
  <ehcache:cache-template name="myDefaultTemplate">
    <ehcache:expiry>
      <ehcache:none/><!-- 緩存永不過時 -->
    </ehcache:expiry>
  </ehcache:cache-template>

</ehcache:config>

二、spring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"
	xmlns:cache="http://www.springframework.org/schema/cache"
	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
	http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd">
	<!--eguid博客地址：http://bog.eguid.cc-->
	<cache:annotation-driven cache-manager="cacheManager" /><!--掃描cache註解，若是已有能夠不要-->
	<context:component-scan base-package="cc.eguid.cache" /><!--掃描路徑 -->
	<!-- jcache緩存 -->
	<bean id="jCacheManager" class="org.springframework.cache.jcache.JCacheManagerFactoryBean">  
    	    <property name="cacheManagerUri" value="classpath:config/ehcache.xml" />  <!--改爲配置文件對應的路徑-->
	</bean>
	<bean id="cacheManager" class="org.springframework.cache.jcache.JCacheCacheManager">  
	    <property name="cacheManager" ref="jCacheManager" />
	</bean>  
</beans>

3、使緩存生效

一、註解方式使用

@Cacheable(value="cameraCache",key="#userid")

public String getCameraList(String userid,Integer otherparam) {

...

}

spring-cache的註解比較簡單就再也不贅述了。