hibernate4二级缓存demo实例.doc

hibernate4 二级缓存demo实例hibernate使用版本是：hibernate-release-4.2.5.Final需要的jar包：hibernate-release-4.2.5.Finallibrequired下所有jar包ehcache jar包：hibernate-release-4.2.5.Finalliboptionalehcache下所有包junit：junit-4.10.jar和mysql-connector-java-5.1.15-bin.jar注：hibernate 4.2.5版本ehcache缓存不依赖commons-logging-1.1.1.jar,需要的是slf4j-api-1.6.1.jar项目结构如下hibernate.cfg.xml com.mysql.jdbc.Driver jdbc:mysql:/:3306/hibernate4 root root 1 org.hibernate.dialect.MySQL5Dialect thread !-ernal.NoCacheProvider - true org.hibernate.cache.ehcache.EhCacheRegionFactory !- org.hibernate.cache.EhCacheProvider - true true update 注意：hibernate4和hibernate3配置不一样，hibernate4是org.hibernate.cache.ehcache.EhCacheRegionFactory 而hibernate3的配置是org.hibernate.cache.EhCacheProvider 此处有一个疑问是：hibernate4的官方文档中，已经把class改了，但是属性名称没有改，还是vider_class，不是上面的hibernate.cache.region.factory_class，但是写成vider_class会报下面错误 org.hibernate.service.spi.ServiceException: Unable to create requested service org.hibernate.engine.spi.CacheImplementor at ernal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:186) at ernal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:150) at ernal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131) at ernal.SessionFactoryImpl.(SessionFactoryImpl.java:264) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1790) at com.test.pojo.UserTest.beforeClass(UserTest.java:28) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45) at ernal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42) at ernal.runners.statements.RunBefores.evaluate(RunBefores.java:27) at org.junit.runners.ParentRunner.run(ParentRunner.java:300) at ernal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:46) at ernal.junit.runner.TestExecution.run(TestExecution.java:38) at ernal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at ernal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at ernal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at ernal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)Caused by: org.hibernate.cache.NoCacheRegionFactoryAvailableException: Second-level cache is used in the application, but property hibernate.cache.region.factory_class is not given, please either disable second level cache or set correct region factory class name to property hibernate.cache.region.factory_class (and make sure the second level cache provider, hibernate-infinispan, for example, is available in the classpath). at ernal.NoCachingRegionFactory.buildTimestampsRegion(NoCachingRegionFactory.java:87) at org.hibernate.cache.spi.UpdateTimestampsCache.(UpdateTimestampsCache.java:62) at ernal.CacheImpl.(CacheImpl.java:72) at org.hibernate.engine.spi.CacheInitiator.initiateService(CacheInitiator.java:40) at org.hibernate.engine.spi.CacheInitiator.initiateService(CacheInitiator.java:35) at ernal.SessionFactoryServiceRegistryImpl.initiateService(SessionFactoryServiceRegistryImpl.java:91) at ernal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:176) . 20 more 说是hibernate.cache.region.factory_class属性没有配置，估计官方文档里没有把属性改过来。 ehcache.xml User实体类package com.test.pojo;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.GenerationType;import javax.persistence.Id;import org.hibernate.annotations.Cache;import org.hibernate.annotations.CacheConcurrencyStrategy;EntityCache(usage=CacheConcurrencyStrategy.READ_WRITE)public class User Id GeneratedValue(strategy=GenerationType.IDENTITY) private int id; private String name; private int age; public int getId() return id; public void setId(int id) this.id = id; public String getName() return name; public void setName(String name) = name; public int getAge() return age; public void setAge(int age) this.age = age; UserTest测试类：package com.test.pojo;import org.hibernate.HibernateException;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.cfg.Configuration;import org.hibernate.service.ServiceRegistry;import org.hibernate.service.ServiceRegistryBuilder;import org.junit.BeforeClass;import org.junit.Test;public class UserTest private static SessionFactory sessionFactory = null; BeforeClass public static void beforeClass() Configuration configuration = new Configuration(); try configuration.configure(); catch (HibernateException e) / TODO Auto-generated catch block e.printStackTrace(); ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties().buildServiceRegistry(); sessionFactory = configuration.buildSessionFactory(serviceRegistry); Test public void testEhcache() Session session = sessionFactory.openSession(); session.beginTransaction(); User u1 = (User) session.load(User.class, 3); System.out.println(u1.getName(); session.getTransaction().commit(); session.close(); Session session2 = sessionFactory.openSession(); session2.beginTransaction(); User u2 = (User) session2.load(User.class, 3); System.out.println(u2.getName(); session2.getTransaction().commit(); session2.close(); 结果：Hibernate: select user0_.id as id1_0_0_, user0_.age as age2_0_0_, user0_.name as name3_0_0_ from User user0_ where user0_.id=?zhangsanzhangsan list二级缓存测试package com.test.pojo;import java.util.List;import org.hibernate.HibernateException;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.cfg.Configuration;import org.hibernate.service.ServiceRegistry;import org.hibernate.service.ServiceRegistryBuilder;import org.junit.BeforeClass;import org.junit.Test;public class UserTest private static SessionFactory sessionFactory = null; BeforeClass public static void beforeClass() Configuration configuration = new Configuration(); try configuration.configure(); catch (HibernateException e) / TODO Auto-generated catch block e.printStackTrace(); ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties().buildServiceRegistry(); sessionFactory = configuration.buildSessionFactory(serviceR