java.lang.NoClassDefFoundError: org/apache/commons/collections/map/LRUMap?at org.hibernate.internal.util.collections.SimpleMRUCache.init(SimpleMRUCache.java:71)?at org.hibernate.internal.util.collections.SimpleMRUCache.<init>(SimpleMRUCache.java:55)?at org.hibernate.engine.query.spi.QueryPlanCache.<init>(QueryPlanCache.java:89)?at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:272)?at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1737)?at StudentTest.init(StudentTest.java:25)?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:50)?at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)?at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)?at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)?at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)?at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)?at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)?at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)?at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)?at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)?at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)?at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)?at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)?at org.junit.runners.ParentRunner.run(ParentRunner.java:363)?at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)?at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)?at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)?at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)?at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)?at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)Caused by: java.lang.ClassNotFoundException: org.apache.commons.collections.map.LRUMap?at java.net.URLClassLoader.findClass(Unknown Source)?at java.lang.ClassLoader.loadClass(Unknown Source)?at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)?at java.lang.ClassLoader.loadClass(Unknown Source)?... 30 morejava.lang.NullPointerException?at StudentTest.destory(StudentTest.java:35)?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:50)?at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)?at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)?at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:33)?at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)?at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)?at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)?at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)?at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)?at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)?at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)?at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)?at org.junit.runners.ParentRunner.run(ParentRunner.java:363)?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:678)?at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)?at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)