内容提要:本文系本人在使用Hibernate过程中遇到的一些异常及相应的解决方法。

异常1:not-null property references a null or transient value
解决方法:将“一对多”关系中的“一”方,not-null设置为false
(参考资料:http://www.thearcmind.com/confluence/pages/viewpage.action?pageId=212)

异常2:org.hibernate.TransientObjectException: object references an unsaved transient instance
解决方法:cascade="save-update,persist"
(参考资料:http://www.laliluna.de/254.html)

异常3:org.hibernate.QueryException: could not resolve property
解决方法:"from Category category where category.userID = :userID"修改为"from Category category where userID = :userID"或者"from Category category where category.user.id = :userID"
(参考资料:http://www.laliluna.de/277.html)

异常4:could not initialize proxy - the owning Session was closed
解决方法:设置lazyfalse
(参考资料:http://forum.springframework.org/showthread.php?t=27993)



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