这个错误是什么原因导致的

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)