hibernate中使用ehcache缓存框架

1.在项目中配置ehcache文件

2.ehcache.xml的配置文件

<ehcache>
<!-- Sets the path to the directory where cache .data files are created.
If the path is a Java System Property it is replaced by
its value in the running VM.
The following properties are translated:
user.home - User's home directory
user.dir - User's current working directory
java.io.tmpdir - Default temp file path -->
<diskStore path="java.io.tmpdir"/>
<!--Default Cache configuration. These will applied to caches programmatically created through
the CacheManager.
The following attributes are required for defaultCache:
maxInMemory - Sets the maximum number of objects that will be created in memory
eternal - Sets whether elements are eternal. If eternal, timeouts are ignored and the element
is never expired.
timeToIdleSeconds - Sets the time to idle for an element before it expires. Is only used
if the element is not eternal. Idle time is now - last accessed time
timeToLiveSeconds - Sets the time to live for an element before it expires. Is only used
if the element is not eternal. TTL is now - creation time
overflowToDisk - Sets whether elements can overflow to disk when the in-memory cache
has reached the maxInMemory limit.
-->
<defaultCache
maxElementsInMemory="10000"
eternal="false"
timeToIdleSeconds="120"
timeToLiveSeconds="120"
overflowToDisk="true"
/>
<!--Predefined caches. Add your cache configuration settings here.
If you do not have a configuration for your cache a WARNING will be issued when the
CacheManager starts
The following attributes are required for defaultCache:
name - Sets the name of the cache. This is used to identify the cache. It must be unique.
maxInMemory - Sets the maximum number of objects that will be created in memory
eternal - Sets whether elements are eternal. If eternal, timeouts are ignored and the element
is never expired.
timeToIdleSeconds - Sets the time to idle for an element before it expires. Is only used
if the element is not eternal. Idle time is now - last accessed time
timeToLiveSeconds - Sets the time to live for an element before it expires. Is only used
if the element is not eternal. TTL is now - creation time
overflowToDisk - Sets whether elements can overflow to disk when the in-memory cache
has reached the maxInMemory limit.
-->
<!-- Sample cache named sampleCache1
This cache contains a maximum in memory of 10000 elements, and will expire
an element if it is idle for more than 5 minutes and lives for more than
10 minutes.
If there are more than 10000 elements it will overflow to the
disk cache, which in this configuration will go to wherever java.io.tmp is
defined on your system. On a standard Linux system this will be /tmp"
-->
<cache name="sampleCache1"
maxElementsInMemory="10000"
eternal="false"
timeToIdleSeconds="300"
timeToLiveSeconds="600"
overflowToDisk="true"
/>
<!-- Sample cache named sampleCache2
This cache contains 1000 elements. Elements will always be held in memory.
They are not expired. -->
<cache name="sampleCache2"
maxElementsInMemory="1000"
eternal="true"
timeToIdleSeconds="0"
timeToLiveSeconds="0"
overflowToDisk="false"
/> -->
<!-- Place configuration for your caches following -->
</ehcache>

3.StudentTest.java

package com.ask.test;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.SQLQuery;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;
import org.junit.Before;
import org.junit.Test;
import com.ask.pojo1.Classes;
import com.ask.pojo1.Student;
import com.ask.util.HibernateUtil;
public class StudentTest {
private SessionFactory sessionFactory;
@Before
public void setUp() throws Exception {
Configuration cfg=new Configuration().configure();
ServiceRegistry serviceRegistry=
new ServiceRegistryBuilder().applySettings(cfg.getProperties()).buildServiceRegistry();
sessionFactory=cfg.buildSessionFactory(serviceRegistry);
}
@Test
public void getEHCacheStudent() {
Session session=sessionFactory.openSession();
session.beginTransaction();
Classes cls=(Classes) session.get(Classes.class,1);
System.out.println(cls);
System.out.println(session);
session.close();
System.out.println("--------------");
Session session1=sessionFactory.openSession();
session1.beginTransaction();
Classes cls1=(Classes) session1.get(Classes.class,1);
System.out.println(cls1);
System.out.println(session1);
session1.close();

}
//hibernate的hql的查询;
@Test
public void HQLGetStudent() {
Session session=sessionFactory.openSession();
// String hql="from Student s where s.id=?";
String hql="from Student s where s.id=:id";
Query query=session.createQuery(hql);
query.setInteger("id", 1);
Student s=(Student) query.uniqueResult();
System.out.println(s);

}
//Criteria的分页查询;
@Test
public void QBCGetStudent() {//query by Criteria
Session session=sessionFactory.openSession();
Criteria criteria=session.createCriteria(Student.class);
List<Student> stus=criteria.list();
for (Student student : stus) {
System.out.println(student);
}

}
//Query分页查询;
@Test
public void SQLGetStudent() throws NoSuchFieldException, SecurityException {
Session session=sessionFactory.openSession();
String sql="select * from student";
Query query=session.createSQLQuery(sql).addEntity(Student.class);

// query.setInteger(0, 7);
List<Student> stus=(List<Student>) query.list();
for (Student s : stus) {
System.out.println(s);
}

}

@Test
public void testSelect() {
Session session=sessionFactory.openSession();
Classes cls=(Classes) session.get(Classes.class, 1);
System.out.println(cls);
List<Student> stus=new ArrayList<Student>(cls.getStus());
for (Student student : stus) {
System.out.println(student);
}
}
}