家里电脑装的XP.用的eclipse3.2  myeclipse5.5  .用hibernate.自动生成POJO和DAO.数据库是mysql5.0.是最基本的单表  只有2个字段.id自动递增.name,由我输入.最后调用SAVE()方法就报错.

log4j:WARN No appenders could be found for logger (org.mapping.Test1DAO).
log4j:WARN Please initialize the log4j system properly.
Hibernate: insert into lfsoft.test1 (name) values (?)
Exception in thread "main" org.hibernate.AssertionFailure: InvocationTargetException extracting generated keys (JDBC3)
 at org.hibernate.util.GetGeneratedKeysHelper.getGeneratedKey(GetGeneratedKeysHelper.java:75)
 at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:1970)
 at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2405)
 at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:37)
 at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:248)
 at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:269)
 at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:167)
 at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:101)
 at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:186)
 at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
 at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:175)
 at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
 at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
 at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:530)
 at org.hibernate.impl.SessionImpl.save(SessionImpl.java:518)
 at org.hibernate.impl.SessionImpl.save(SessionImpl.java:514)
 at org.mapping.Test1DAO.save(Test1DAO.java:26)
 at org.mapping.Test1DAO.main(Test1DAO.java:137)
Caused by: java.lang.reflect.InvocationTargetException
 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.util.GetGeneratedKeysHelper.getGeneratedKey(GetGeneratedKeysHelper.java:65)
 ... 17 more

  我把公司的eclipse考回来还是报错.后来换了JDK6.0,结果还是一样,无解了.希望高手能解决一下.不生感激