org.hibernate.id.IdentifierGenerationException错误提示

org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): org.wuqing.DAO.CompanyBaseMessage
org.hibernate.id.Assigned.generate(Assigned.java:33)
org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:91)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:186)
org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:175)
org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:530)
org.hibernate.impl.SessionImpl.save(SessionImpl.java:518)
org.hibernate.impl.SessionImpl.save(SessionImpl.java:514)
org.wuqing.DAO.CompanyBaseMessageDAO.save(CompanyBaseMessageDAO.java:43)
org.wuqing.Servlet.CompanyInsert.doPost(CompanyInsert.java:71)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

[此贴子已经被作者于2007-9-17 11:24:46编辑过]