高分求救Hibernate中不能更新数据的问题(100)
错误内容如下:
Hibernate:   update   test.dbo.userinfo   set   username=?,   password=?   where   id=?
Exception   in   thread   "main "   org.hibernate.StaleStateException:   Unexpected   row   count:   0   expected:   1
at   org.hibernate.jdbc.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:27)
at   org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2204)
at   org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2118)
at   org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2374)
at   org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:91)
at   org.hibernate.engine.ActionQueue.execute(ActionQueue.java:248)
at   org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:232)
at   org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:140)
at   org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:297)
at   org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
at   org.hibernate.impl.SessionImpl.flush(SessionImpl.java:985)
at   org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:333)
at   org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
at   gwm.com.Useroperation.update(Useroperation.java:26)
at   gwm.com.Usermain.main(Usermain.java:19)


数据库是SQl2000表中有三个字段id(主键，自动增长),username,password.

插入，删除，查询,都没有问题，唯到更新这里就报错。

这是对应表的设置:
<hibernate-mapping>
        <class   name= "gwm.com.Userinfo "   table= "userinfo "   schema= "dbo "   catalog= "test ">
                <id   name= "id "   type= "integer ">
                        <column   name= "id "   />
                        <generator   class= "increment "   />
                </id>
                <property   name= "username "   type= "string ">
                        <column   name= "username "   length= "20 "   />
                </property>
                <property   name= "password "   type= "string ">
                        <column   name= "password "   length= "20 "   />
                </property>
        </class>
</hibernate-mapping>

------解决方案--------------------
update test.dbo.userinfo set username=?, password=? where id=?

去掉hql中的逗号“，”。
------解决方案--------------------
能否把update方法贴出来看看?
------解