运行了sample，不能保存

[kevinjava]

[2014-09-19 15:07:55,838][INFO ][org.hibernate.annotations.common.Version] HCANN000001: Hibernate Commons Annotations {4.0.1.Final} [2014-09-19 15:07:55,843][INFO ][org.hibernate.Version ] HHH000412: Hibernate Core {4.1.3.Final} [2014-09-19 15:07:55,845][INFO ][org.hibernate.cfg.Environment] HHH000206: hibernate.properties not found [2014-09-19 15:07:55,846][INFO ][org.hibernate.cfg.Environment] HHH000021: Bytecode provider name : javassist [2014-09-19 15:07:55,866][INFO ][org.hibernate.ejb.Ejb3Configuration] HHH000318: Could not find any META-INF/persistence.xml file in the classpath [2014-09-19 15:07:55,867][ERROR][modules.http ] System processing error javax.persistence.PersistenceException: No Persistence provider for EntityManager named wow

是什么地方配置不对吗？