Org.hibernate.SessionException:Session was already closed

Problems encountered:
The following issues occur when you test hibernate to create a table to a database
Org.hibernate.SessionException:Session was already closed at Org.hibernate.internal.SessionImpl.close ( sessionimpl.java:344) at Sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method) at Sun.reflect.NativeMethodAccessorImpl.invoke (Unknown Source) at Sun.reflect.DelegatingMethodAccessorImpl.invoke ( Unknown source) at Java.lang.reflect.Method.invoke (Unknown source) at Org.hibernate.context.internal.threadlocalsessioncontext$transactionprotectionwrapper.invoke ( threadlocalsessioncontext.java:352) at Com.sun.proxy. $Proxy 5.close (Unknown Source) at Studentstest.destroy ( STUDENTSTEST.JAVA:40) at Sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method) at Sun.reflect.NativeMethodAccessorImpl.invoke (Unknown Source) at Sun.reflect.DelegatingMethodAccessorImpl.invoke ( Unknown source) at Java.lang.reflect.Method.invoke (Unknown source) at Org.junit.runners.model.frameworkmethod$1. Runreflectivecall (frameworkmethod.java:45) at Org.junit.internal.runners.model.ReflectiveCallable.run ( ReflectivecallABLE.JAVA:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively (frameworkmethod.java:42) at Org.junit.internal.runners.statements.RunAfters.evaluate (runafters.java:36) at Org.junit.runners.ParentRunner.runLeaf (parentrunner.java:263) at Org.junit.runners.BlockJUnit4ClassRunner.runChild (blockjunit4classrunner.java:68) at Org.junit.runners.BlockJUnit4ClassRunner.runChild (blockjunit4classrunner.java:47) at Org.junit.runners.parentrunner$3.run (parentrunner.java:231) at Org.junit.runners.parentrunner$1.schedule ( PARENTRUNNER.JAVA:60) at Org.junit.runners.ParentRunner.runChildren (parentrunner.java:229) at org.junit.runners.parentrunner.access$000 (parentrunner.java:50) at Org.junit.runners.parentrunner$2.evaluate ( parentrunner.java:222) at Org.junit.runners.ParentRunner.run (parentrunner.java:300) at Org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run (junit4testreference.java:86) at Org.eclipse.jdt.internal.junit.runner.TestExecution.run (testexecution.java:38) at Org.eclipse. Jdt.internal.junit.runner.RemoteTestRunner.runTests (remotetestrunner.java:459) at Org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests (remotetestrunner.java:675) at Org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run (remotetestrunner.java:382) at Org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main (remotetestrunner.java:192)


Problem solving:
There are two ways of creating a Session object.
1, Session = Sessionfactory.getcurrentsession ();
2, Session = Sessionfactory.opensession ();
When using the first method, you need to use Session.close () to close the Session object
When you use the second method, you do not need to call the above method because the session object is automatically closed, and if you close the object program using the first method, the above error occurs. If you must manually close, you need to add isopen () to determine.