Caused by: java.lang.NoClassDefFoundError: javassist/util/proxy/MethodFilter

报错：

java.lang.ExceptionInInitializerErrorat HanBlog.Model.Dao.HanBlog_UserDaoimpl.get(HanBlog_UserDaoimpl.java:17)at HanBlog.Junit.testUserDao.test(testUserDao.java:12)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:497)at junit.framework.TestCase.runTest(TestCase.java:176)at junit.framework.TestCase.runBare(TestCase.java:141)at junit.framework.TestResult$1.protect(TestResult.java:122)at junit.framework.TestResult.runProtected(TestResult.java:142)at junit.framework.TestResult.run(TestResult.java:125)at junit.framework.TestCase.run(TestCase.java:129)at junit.framework.TestSuite.runTest(TestSuite.java:252)at junit.framework.TestSuite.run(TestSuite.java:247)at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:86)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)Caused by: org.hibernate.MappingException: Could not get constructor for org.hibernate.persister.entity.SingleTableEntityPersisterat org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:185)at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:135)at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:389)at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1799)at HanBlog.Model.HibernateSessionFactory.<clinit>(HibernateSessionFactory.java:35)... 21 moreCaused by: org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer]at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:138)at org.hibernate.tuple.entity.EntityTuplizerFactory.constructDefaultTuplizer(EntityTuplizerFactory.java:188)at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:341)at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:506)at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:146)at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)at java.lang.reflect.Constructor.newInstance(Constructor.java:422)at org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:163)... 25 moreCaused by: java.lang.reflect.InvocationTargetExceptionat sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)at java.lang.reflect.Constructor.newInstance(Constructor.java:422)at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:135)... 34 moreCaused by: java.lang.NoClassDefFoundError: javassist/util/proxy/MethodFilterat org.hibernate.bytecode.internal.javassist.BytecodeProviderImpl.getProxyFactoryFactory(BytecodeProviderImpl.java:56)at org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactoryInternal(PojoEntityTuplizer.java:249)at org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:227)at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:212)at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:82)... 39 moreCaused by: java.lang.ClassNotFoundException: javassist.util.proxy.MethodFilterat java.net.URLClassLoader.findClass(URLClassLoader.java:381)at java.lang.ClassLoader.loadClass(ClassLoader.java:424)at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)at java.lang.ClassLoader.loadClass(ClassLoader.java:357)... 44 more

这个是缺少javassist.jar.

添加javassist-3.18.1-GA.jar即可~