Javassist Enhancement failed

javax.persistence.PersistenceException: org.hibernate.HibernateException: Javassist Enhancement failed: edu.xuchang.bean.user.Teacher
at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:614)
at org.hibernate.ejb.AbstractEntityManagerImpl.getReference(AbstractEntityManagerImpl.java:173)
at test.junit.OtherEntityTest.testdelete1(OtherEntityTest.java:120)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.junit.internal.runners.TestMethodRunner.executeMethodBody(TestMethodRunner.java:99)
at org.junit.internal.runners.TestMethodRunner.runUnprotected(TestMethodRunner.java:81)
at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
at org.junit.internal.runners.TestMethodRunner.runMethod(TestMethodRunner.java:75)
at org.junit.internal.runners.TestMethodRunner.run(TestMethodRunner.java:45)
at org.junit.internal.runners.TestClassMethodsRunner.invokeTestMethod(TestClassMethodsRunner.java:66)
at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35)
at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:38)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: org.hibernate.HibernateException: Javassist Enhancement failed: edu.xuchang.bean.user.Teacher
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.getProxy(JavassistLazyInitializer.java:142)
at org.hibernate.proxy.pojo.javassist.JavassistProxyFactory.getProxy(JavassistProxyFactory.java:72)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.createProxy(AbstractEntityTuplizer.java:402)
at org.hibernate.persister.entity.AbstractEntityPersister.createProxy(AbstractEntityPersister.java:3483)
at org.hibernate.event.def.DefaultLoadEventListener.createProxyIfNecessary(DefaultLoadEventListener.java:298)
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:219)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:126)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:905)
at org.hibernate.impl.SessionImpl.load(SessionImpl.java:822)
at org.hibernate.impl.SessionImpl.load(SessionImpl.java:815)
at org.hibernate.ejb.AbstractEntityManagerImpl.getReference(AbstractEntityManagerImpl.java:161)
... 21 more
Caused by: java.lang.InstantiationException: edu.xuchang.bean.user.Teacher_$$_javassist_5
at java.lang.Class.newInstance0(Class.java:340)
at java.lang.Class.newInstance(Class.java:308)
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.getProxy(JavassistLazyInitializer.java:139)
... 31 more


这个问题困扰我一下午了,原来是,对应的实体类中需要添加相应的无参构造方法,希望对大家有用

评论

7 楼 18215361994 2014-07-25  

这是我的构造方法
public TblBoard() {}，但是还是报这个错，真是郁闷

6 楼 18215361994 2014-07-25  

但是我的类中有无参的构造方法啊？

5 楼 lindongcheng 2014-02-22  

谢楼主,问题搞定了!

不过在此补充一句,大多数情况下,hibernate只需要private的构造函数就像,但在此异常下,需要将private改为public才行,希望对他人有帮助

4 楼 雨打蕉叶 2013-12-27  

谢谢，困扰我两天

3 楼 z_senaj 2012-04-26  

楼主好心了！你的问题救了我啊！

2 楼 waally 2012-03-20  

刚刚好遇到这个问题，谢谢啊

1 楼 foollb 2011-11-23  

正好遇到这个问题,感谢.!