hibernate异常Unable to create requested service [org.hibernate.engine.spi.CacheImple-蒲公英云

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.UpdateTime stampsCache.(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：