Posłużyłem się gotowcem od NetBeansa ( Java Desktop Application > Database application). Stworzyłem połączenie i wybrałem odpowiednią tabele i rekordy. Zrobiłem test czy wyświetlają mi się wartości rekordów (Services/Databases....) i wszystko ładnie wyświetla. Ale po uruchomieniu aplikacji otrzymuję błąd. W czym tkwi problem ?
Error:
run:
2014-05-06 10:19:34 org.jdesktop.application.Application$1 run
SEVERE: Application class desktopapplication1.DesktopApplication1 failed to launch
javax.persistence.PersistenceException: No Persistence provider for EntityManager named jdbc:oracle:thin:@localhost:1521:XEPU: 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 desktopapplication1.DesktopApplication1View.initComponents(DesktopApplication1View.java:285)
at desktopapplication1.DesktopApplication1View.<init>(DesktopApplication1View.java:36)
at desktopapplication1.DesktopApplication1.startup(DesktopApplication1.java:19)
at org.jdesktop.application.Application$1.run(Application.java:171)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
Exception in thread "AWT-EventQueue-0" java.lang.Error: Application class desktopapplication1.DesktopApplication1 failed to launch
at org.jdesktop.application.Application$1.run(Application.java:177)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
Caused by: javax.persistence.PersistenceException: No Persistence provider for EntityManager named jdbc:oracle:thin:@localhost:1521:XEPU: 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 desktopapplication1.DesktopApplication1View.initComponents(DesktopApplication1View.java:285)
at desktopapplication1.DesktopApplication1View.<init>(DesktopApplication1View.java:36)
at desktopapplication1.DesktopApplication1.startup(DesktopApplication1.java:19)
at org.jdesktop.application.Application$1.run(Application.java:171)
... 8 more
BUILD SUCCESSFUL (total time: 6 seconds)
/*
public class DesktopApplication1View extends FrameView {
public DesktopApplication1View(SingleFrameApplication app) {
super(app);
initComponents();
// status bar initialization - message timeout, idle icon and busy animation, etc
ResourceMap resourceMap = getResourceMap();
/*śmieci*/
org.jdesktop.application.ResourceMap resourceMap = org.jdesktop.application.Application.getInstance(desktopapplication1.DesktopApplication1.class).getContext().getResourceMap(DesktopApplication1View.class);
entityManager = java.beans.Beans.isDesignTime() ? null : javax.persistence.Persistence.createEntityManagerFactory(resourceMap.getString("entityManager.persistenceUnit")).createEntityManager(); // NOI18N
query = java.beans.Beans.isDesignTime() ? null : entityManager.createQuery(resourceMap.getString("query.query")); // NOI18N
list = java.beans.Beans.isDesignTime() ? java.util.Collections.emptyList() : org.jdesktop.observablecollections.ObservableCollections.observableList(query.getResultList());
private javax.persistence.EntityManager entityManager;
}
}