<id name="userId" type = "java.lang.String">
<column name ="userid" precision="22" scale="0"/>
<generator class="increment" />
</id>
上面是我的id映射关系，应该是有问题的，我的表里id是String类型的，我写了个注册的页面，点击注册后页面是跳转了，但是数据没有插入到数据库。
报下面的错，不想把类型改成integer，会很麻烦，
Caused by: org.hibernate.id.IdentifierGenerationException: Unknown integral data type for ids : java.lang.String
at org.hibernate.id.IdentifierGeneratorHelper.getIntegralDataTypeHolder(IdentifierGeneratorHelper.java:178)
at org.hibernate.id.IncrementGenerator.initializePreviousValueHolder(IncrementGenerator.java:121)
at org.hibernate.id.IncrementGenerator.generate(IncrementGenerator.java:67)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:122)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:705)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:693)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:689)
at org.springframework.orm.hibernate3.HibernateTemplate$12.doInHibernate(HibernateTemplate.java:685)
at org.springframework.orm.hibernate3.HibernateTemplate$12.doInHibernate(HibernateTemplate.java:1)
at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:405)
... 91 more
------解决方案--------------------------------------------------------
generator不能为increment的