hibernate异常Unable to create requested service [org.hibernate.engine.spi.CacheImple

在使用Hibernate4做二级缓存的测试（HashtableCacheProvider）时，会报如下异常：

org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.spi.CacheImplementor]

at
org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:186)

at
org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:150)

at
org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)

at
org.hibernate.internal.SessionFactoryImpl.(SessionFactoryImpl.java:262)

at
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1746)

at
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1784)

at
action.QueryCache.main(QueryCache.java:19)

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
org.hibernate.cache.internal.NoCachingRegionFactory.buildTimestampsRegion(NoCachingRegionFactory.java:87)

at
org.hibernate.cache.spi.UpdateTimestampsCache.(UpdateTimestampsCache.java:63)

at
org.hibernate.internal.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
org.hibernate.service.internal.SessionFactoryServiceRegistryImpl.initiateService(SessionFactoryServiceRegistryImpl.java:91)

at
org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:176)

...
6 more

Exception in thread "main" java.lang.NullPointerException

at
action.QueryCache.main(QueryCache.java:25)

主要原因有下：

1.



2.在org.hibernate.cache包下面缺少很多class文件，如HashtableCacheProvider.class等，你可以将hibernate3中org.hibernate.cache下面的文件拷贝到hibernate4的核心jar包下，或者使用Hibernate3的核心jar包。