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
lazy为
false(参考资料:http://forum.springframework.org/showthread.php?t=27993)