Entity manager -persistence -error
Dakle poceo sam da radim nesto oko jedne swing aplikacije. Potrebno je napraviti klasican sifarnik za neku tabelu iz mysql-a. Za alat sam odabrao Netbeans 7.1.
Video sam da netbeans ima neke gotove maske za sifarnike(new swing gui form/ master detail sample form). Kada prodjem kroz wizard i napravim sve bude ok,medjutim da bih shvatio logiku krenem sam da pravim to isto.
Dakle, kreiram aplikaciju, zatim dodam obican JFrame, dodam persistence/entity classess from database, dodam tabelu i dotle je ok.
Vidim da postoje i neke komponente koje mi mogu sluziti kao sto su Entity manager-query-list query. Cim dodam Entity manager on mi sam pronadje i postavi persistence unit i to je ok. E ako sad pokusam da kompajliram aplikaciju i pustim javlja mi sledecu gresku:
Exception in thread "AWT-EventQueue-0" javax.persistence.PersistenceException: No Persistence provider for EntityManager named SifarnikMojKopijaNetbeansPU
at javax.persistence.Persistence.createEntityManagerFactory(Unknown Source)
at javax.persistence.Persistence.createEntityManagerFactory(Unknown Source)
at maske.Prozor.initComponents(Prozor.java:29)
at maske.Prozor.<init>(Prozor.java:17)
at maske.Prozor$1.run(Prozor.java:106)
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)
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