spring小结之配置二级缓存!

一、spring二级缓存主要分为三步,可以参考附件程序理解:

1、在spring的bean.xml中添加以下三行代码hibernate.cache.use_second_level_cache=true
               hibernate.cache.use_query_cache=false
            hibernate.cache.provider_class=org.hibernate.cache.EhCacheProvider

<?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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
	 <context:annotation-config/>
	 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
	    <property name="driverClassName" value="org.gjt.mm.mysql.Driver"/>
	    <property name="url" value="jdbc:mysql://localhost:3306/itcast?useUnicode=true&amp;characterEncoding=UTF-8"/>
	    <property name="username" value="root"/>
	    <property name="password" value="symbio"/>
	     <!-- 连接池启动时的初始值 -->
		 <property name="initialSize" value="1"/>
		 <!-- 连接池的最大值 -->
		 <property name="maxActive" value="500"/>
		 <!-- 最大空闲值.当经过一个高峰时间后,连接池可以慢慢将已经用不到的连接慢慢释放一部分,一直减少到maxIdle为止 -->
		 <property name="maxIdle" value="2"/>
		 <!--  最小空闲值.当空闲的连接数少于阀值时,连接池就会预申请去一些连接,以免洪峰来时来不及申请 -->
		 <property name="minIdle" value="1"/>
	  </bean>
	  
	<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
	     <property name="dataSource" ref="dataSource"/>
		 <property name="mappingResources">
		    <list>
		      <value>cn/itcast/bean/Person.hbm.xml</value>
		    </list>
		 </property>
	     <property name="hibernateProperties">
		    <value>
		        hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
		        hibernate.hbm2ddl.auto=update
		        hibernate.show_sql=false
		        hibernate.format_sql=false
		        hibernate.cache.use_second_level_cache=true
       	        hibernate.cache.use_query_cache=false
        	    hibernate.cache.provider_class=org.hibernate.cache.EhCacheProvider
		      </value>
	     </property>
	</bean>
	<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
	  	<property name="sessionFactory" ref="sessionFactory"/>
	</bean>
	<tx:annotation-driven transaction-manager="txManager"/>
	<bean id="personService" class="cn.itcast.service.impl.PersonServiceBean"/>
	
	<bean name="/person/list" class="cn.itcast.web.action.PersonAction"/>
	<bean name="/person/manage" class="cn.itcast.web.action.PersonManageAction"/>
</beans>

2、新建二级缓存配置文件ehcache.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- 
    defaultCache节点为缺省的缓存策略
     maxElementsInMemory 内存中最大允许存在的对象数量
     eternal 设置缓存中的对象是否永远不过期
     overflowToDisk 把溢出的对象存放到硬盘上
     timeToIdleSeconds 指定缓存对象空闲多长时间就过期,过期的对象会被清除掉
     timeToLiveSeconds 指定缓存对象总的存活时间
     diskPersistent 当jvm结束是是否持久化对象
     diskExpiryThreadIntervalSeconds 指定专门用于清除过期对象的监听线程的轮询时间
 -->
<ehcache>
    <diskStore path="D:\cache"/>
    <defaultCache  maxElementsInMemory="1000" eternal="false" overflowToDisk="true"
        timeToIdleSeconds="120"
        timeToLiveSeconds="180"
        diskPersistent="false"
        diskExpiryThreadIntervalSeconds="60"/>
	<cache name="cn.itcast.bean.Person" maxElementsInMemory="100" eternal="false"
    overflowToDisk="true" timeToIdleSeconds="300" timeToLiveSeconds="600" diskPersistent="false"/>
</ehcache>

 

3、在需要缓存的相应的实体对象映射文件上加上:<cache usage="read-write" region="cn.itcast.bean.Person"/>

 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.itcast.bean">
    <class name="Person" table="person">
    	<cache usage="read-write" region="cn.itcast.bean.Person"/>
        <id name="id">
            <generator class="native"/>
        </id>
        <property name="name" length="10" not-null="true"/>
    </class>
</hibernate-mapping>

 

 

备注:附件中为准确的项目,但是因上传文件大小受限制,所以去掉了lib下的所有jar包。

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