Hibernate缓存管理

<ehcache>
<diskStore path="c:\\ehcache\"/> 
<defaultCache 
maxElementsInMemory="10000" 
eternal="false" 
timeToIdleSeconds="120" 
timeToLiveSeconds="120" 
overflowToDisk="true"   
/>
<!-- 设置Category类的缓存的数据过期策略 -->
<cache name="org.qiujy.domain.cachedemo.Category"
maxElementsInMemory="100"
eternal="true"
timeToIdleSeconds="0"
timeToLiveSeconds="0"
overflowToDisk="false"
/>
<!-- 设置Category类的products集合的缓存的数据过期策略 -->
<cache name="org.qiujy.domain.cachedemo.Category.products"
maxElementsInMemory="500"
eternal="false"
timeToIdleSeconds="300"
timeToLiveSeconds="600"
overflowToDisk="true"
/>
<cache name="org.qiujy.domain.cachedemo.Product"
maxElementsInMemory="500"
eternal="false"
timeToIdleSeconds="300"
timeToLiveSeconds="600"
overflowToDisk="true"
/>
</ehcache> 

package org.qiujy.test.cache;

import java.util.List;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.qiujy.common.HibernateSessionFactory;
import org.qiujy.domain.cachedemo.Product;

public class TestCache {

public static void main(String[] args) {

//test cache.........
Session session2 = HibernateSessionFactory.getSession();
Transaction tx2 =null;

try{ 
tx2 = session2.beginTransaction();

List list = session2.createQuery("from Product").list();

for(int i = 0 ; i < list.size(); i++){
Product prod = (Product)list.get(i);
System.out.println(prod.getName());
}

tx2.commit();
}catch(HibernateException e){
if(tx2 != null){
tx2.rollback();
}
e.printStackTrace();
}finally{
HibernateSessionFactory.closeSession();
}

//-------------------
Session session3 = HibernateSessionFactory.getSession();
Transaction tx3 =null;

try{ 
tx3 = session3.beginTransaction();

Product prod = (Product)session3.get(Product.class, new Long(1));
System.out.println("从cache中得到,不执行SQL---" + prod.getName());

tx3.commit();
}catch(HibernateException e){
if(tx3 != null){
tx3.rollback();
}
e.printStackTrace();
}finally{
HibernateSessionFactory.closeSession();
}
}
}