最近在做办公自动化的项目,用的框架是SSH,在SSH整合的时候遇到了这样的问题
1. Field ‘id’ doesn’t have a default value
2.could not insert: [cn.itcast.oa.domain.Role]
Struts Problem Report
Struts has detected an unhandled exception:
Messages:
1. Field 'id' doesn't have a default value
2. could not insert: [cn.itcast.oa.domain.Role]
File:
com/mysql/jdbc/SQLError.java
Line number:
1,056
Stacktraces
org.hibernate.exception.GenericJDBCException: could not insert: [cn.itcast.oa.domain.Role]
org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:140)
org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:128)
org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:64)
org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2327)
org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2834)
org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:71)
org.hibernate.engine.ActionQueue.execute(ActionQueue.java:273)
org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:320)
org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:203)
org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:129)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
这是因为表的id字段没有设置成自增长的
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前台没有传id的值,后台没有将id设置为自增长的,而id字段设置了notnull,所以会出现了这个问题.