struts +hibernate 实现注册

org.hibernate.exception.GenericJDBCException: Could not execute JDBC batch update
org.hibernate.exception.ErrorCodeConverter.handledNonSpecificException(ErrorCodeConverter.java:92)
org.hibernate.exception.ErrorCodeConverter.convert(ErrorCodeConverter.java:80)
org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:181)
org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:226)
org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:136)
org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:274)
org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
org.hibernate.impl.SessionImpl.flush(SessionImpl.java:730)
org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:324)
org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:86)
dao.UserDAO.save(UserDAO.java:14)
bo.UserBO.save(UserBO.java:31)
com.yourcompany.struts.action.RegAction.execute(RegAction.java:41)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
fileter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:33)
一提交到action里面 就会报这个错,表单里面的数据能打印出来,是在是找不到原因.望各位大哥帮我看看