spring+ehcache+註解的使用

spring+ehcache+註解的使用java

     

     爲了提升系統的運行效率,引入緩存機制,減小數據庫訪問和磁盤IO。下面說明一下ehcache和spring整合配置。spring

     總共須要四步,引入包,添加ehcache.xml文件,在spring的配置文件applicationContext.xml中添加ehcache的配置,在service層裏的方法上添加ehcache註解。數據庫

1.須要的包緩存

   ehcache-core-2.1.0.jarapp

   ehcache-spring-annotations-1.1.2.jarspa

 

2.ehcache.xml文件xml

   

<?xml version="1.0" encoding="UTF-8"?>
 <ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchemainstance"                      get

         xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd">
  
    <diskStore path="java.io.tmpdir/ehcache"/>
   
    <!-- 默認緩存 -->
    <defaultCache
         maxElementsInMemory="1000"
         eternal="false"
         timeToIdleSeconds="120"
         timeToLiveSeconds="120"
         overflowToDisk="false"/>
    
     <!-- 菜單緩存 -->   
    <cache name="userCache"
             maxElementsInMemory="1000"
             eternal="false"
             timeToIdleSeconds="120"
             timeToLiveSeconds="120"
             overflowToDisk="false"
             memoryStoreEvictionPolicy="LRU"/>
   
</ehcache>
io

 3.applicationContext.xml文件class

    <?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-3.0.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-3.0.xsd
            http://www.springframework.org/schema/cache
            http://www.springframework.org/schema/cache/spring-cache-3.2.xsd">
   
        <cache:annotation-driven cache-manager="cacheManager"/>
   
         <bean id="cacheManagerFactory" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
            <property name="configLocation" value="classpath:/ehcache.xml" />
        </bean>
   
        <bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">   
            <property name="cacheManager"  ref="cacheManagerFactory"/>   
        </bean>
 
    </beans>

 4.使用  在service層的方法上加註解

        (1)添加緩存

          @Cacheable(value="userCache")
           public List<user> findUserList()
           {
                    ……
           }
     

       (2)清除緩存

        @CacheEvict(value="userCache")
         public boolean delUser(User user) {
            ……
         }

這樣既可實現緩存。

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