log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Hibernate: insert into users (name, birthday) values (?, ?)
select @@identity
Exception in thread "main" org.hibernate.exception.SQLGrammarException: could not insert: [cn.itcast.bean.Users]
    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:67)
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
    at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:40)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2158)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2638)
    at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:48)
    at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250)
    at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:298)
    at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:181)
    at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107)
    at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
    at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
    at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
    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:535)
    at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523)
    at org.hibernate.impl.SessionImpl.save(SessionImpl.java:519)
    at cn.itcast.hibernate.TestHibernate.main(TestHibernate.java:26)
Caused by: com.sybase.jdbc2.jdbc.SybSQLException: users not found. Specify owner.objectname or use sp_help to check whether the object exists (sp_help may produce lots of output).

    at com.sybase.jdbc2.tds.Tds.processEed(Tds.java:2535)
    at com.sybase.jdbc2.tds.Tds.nextResult(Tds.java:1916)
    at com.sybase.jdbc2.jdbc.ResultGetter.nextResult(ResultGetter.java:69)
    at com.sybase.jdbc2.jdbc.SybStatement.nextResult(SybStatement.java:201)
    at com.sybase.jdbc2.jdbc.SybStatement.nextResult(SybStatement.java:182)
    at com.sybase.jdbc2.jdbc.SybStatement.executeLoop(SybStatement.java:1596)
    at com.sybase.jdbc2.jdbc.SybStatement.execute(SybStatement.java:1588)
    at com.sybase.jdbc2.jdbc.SybPreparedStatement.execute(SybPreparedStatement.java:580)
    at org.hibernate.id.IdentityGenerator$InsertSelectDelegate.executeAndExtract(IdentityGenerator.java:108)
    at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:33)
    ... 16 more