学习hibernate缓存

spring+hibernate

在hibernate配置文件中

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory name="sessionFactory">
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="hibernate.connection.password">pass</property>
        <property name="hibernate.connection.url">jdbc:mysql://localhost/cache</property>
        <property name="hibernate.connection.username">root</property>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLMyISAMDialect</property>
   <property name="hibernate.show_sql">true</property>
<property name="hibernate.format_sql">true</property>
<property name="hibernate.cache.use_second_level_cache">true</property>
<property name="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</property>
<property name="hibernate.bytecode.use_reflection_optimizer">true</property>
<property name="hibernate.generate_statistics">true</property>
<property name="hibernate.cache.use_query_cache">true</property>

    <mapping resource="bean/Class.hbm.xml" />
   <mapping resource="bean/Student.hbm.xml" />
<mapping resource="bean/Teacher.hbm.xml" />
    </session-factory>
</hibernate-configuration>

 然后写一个ehcache.xml在工程的classpath里，我的路径在src下面。

<?xml version="1.0" encoding="UTF-8"?>
<ehcache>  
     <diskStore path="d:\\ehcache" />  
    <defaultCache maxElementsInMemory="10000" eternal="false"  
        overflowToDisk="true" timeToIdleSeconds="120" timeToLiveSeconds="600"  
        diskPersistent="false" diskExpiryThreadIntervalSeconds="120" />  
        <cache name="bean.Class"  
        maxElementsInMemory="50" eternal="false" timeToIdleSeconds="300" timeToLiveSeconds="1800"   
        overflowToDisk="true" />  
</ehcache>  

要是启动出现

2008-12-15 21:41:17 org.hibernate.cfg.SettingsFactory buildSettings
信息: Second-level cache: enabled
2008-12-15 21:41:17 org.hibernate.cfg.SettingsFactory buildSettings
信息: Query cache: enabled
2008-12-15 21:41:17 org.hibernate.cfg.SettingsFactory createCacheProvider
信息: Cache provider: org.hibernate.cache.EhCacheProvider

字样就表示配置成功了 

 

针对Class这个类的session打开时，缓存就准备起作用了。要是查完东西关掉了，比如查了个select *，然后交给vo，关掉这个session，下次再打开这个session会怎么样？估计缓存也不见了。。。等会试一下看看什么情况。

 

 

囧……tomcat启动了，缺访问不了，我的妈呀，怎么试啊。