Hibernate Unknown Entity Exception solution

1. Org.hibernate.MappingException:Unknown entity exception details are as follows:

   Org.hibernate.MappingException:Unknown entity:com.gis520.model.Emp_emp

   At Org.hibernate.impl.SessionFactoryImpl.getEntityPersister (sessionfactoryimpl.java:628)

   At Org.hibernate.impl.SessionImpl.getEntityPersister (sessionimpl.java:1366)

   At Org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId (abstractsaveeventlistener.java:121)

   At Org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId ( defaultsaveorupdateeventlistener.java:210)

   At Org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId ( DEFAULTSAVEEVENTLISTENER.JAVA:56)

   At Org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient ( defaultsaveorupdateeventlistener.java:195)

   ............

   At Org.junit.runners.parentrunner$3.run (parentrunner.java:193)

   At Org.junit.runners.parentrunner$1.schedule (parentrunner.java:52)

   At Org.junit.runners.ParentRunner.runChildren (parentrunner.java:191)

   At org.junit.runners.parentrunner.access$000 (parentrunner.java:42)

   At Org.junit.runners.parentrunner$2.evaluate (parentrunner.java:184)

   At Org.junit.runners.ParentRunner.run (parentrunner.java:236)

   At Org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run (junit4testreference.java:50)

   At Org.eclipse.jdt.internal.junit.runner.TestExecution.run (testexecution.java:38)

   At Org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests (remotetestrunner.java:467)

   At Org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests (remotetestrunner.java:683)

   At Org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run (remotetestrunner.java:390)

   At Org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main (remotetestrunner.java:197)

   END

Solution:

1. Cause Analysis 1:

   This may be because the correct package was not imported when using annotations. To be clear, the Entity package is javax.persistence.Entity, not the annotation under Hibernate package.

2. Cause Analysis 2:

   <mapping class= ""/> is not configured under *.cfg.xml when using annotations, which causes Org.hibernate.MappingException:Unknown entity exception

3. 3

   Org.hibernate.MappingException:Unknown Entity solution is the above two reasons. If you use annotations, the top two must be the correct one. If you are using a *.hbm.xml file, see if *.hbm.xml has added a reference. Exceptions can be resolved after elimination.

Hibernate Unknown Entity Exception solution