这个错误是什么原因导致的

[rtsm_rtsm]

我做了一个Swing，在jTable链接数据库时报错，各位看看是怎么回事
Exception in thread "AWT-EventQueue-0" javax.persistence.PersistenceException: No Persistence provider for EntityManager named localhost:1433;databaseName=WEBGPSPU: The following providers:
oracle.toplink.essentials.PersistenceProvider
oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider
Returned null to createEntityManagerFactory.

at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:154)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
at center.NewJFrame.initComponents(NewJFrame.java:35)
at center.NewJFrame.<init>(NewJFrame.java:22)
at center.NewJFrame$1.run(NewJFrame.java:93)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

[Jyie_DK]

你好，你新建个项目，把你这个类移到新顶目下应该就能解决了。

[Inhibitory]

No Persistence provider

与JTable无关，错误出现在你连接Oracle上.