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【�{载】数据表/字段名称和数据库关键字冲�H�在Hibernate映射中的处理办法

Thomas — Tue, 21 Aug 2007 06:02:00 GMT

原文地址�Q�http://blog.csdn.net/CaiKanXP/archive/2006/12/27/1465047.aspx

环境�Q?br>HIBERNATE 3�Q�MySQL 5.0

现象�Q?br>当表名或字段名和MySQL关键字有冲突�Ӟ��会出错�?/p>

解决�Ҏ��Q?br>�?Hibernate 映射配置文�g中，�?span style="font-weight: bold; color: red;">��表名或字段名用两个重音�W�号�Q�`�Q�括��h��。重音符号键��x��键盘�?#8220;1”键左边的�?#8220;Tab”键上边的那个键。此�W�号亦被�U�Cؓ“反向引号”�?br>可以看到�Q�这样做后Hibernate生成的SQL语句名称都用�Q�`�Q�括��h��了，�q�样数据库便可以识别其不是关键字了�?br>�Ҏ��的表名和字段名，比如含有�I�格的名�U�ͼ�也可�q�样做�?/p>

参�?/font>�Q?br>6.3. SQL中引号包围的标识�W?/a>
baidu:SQL中引号包围的标识�W?/a>
google:SQL中引号包围的标识�W?/a>

Thomas 2007-08-21 14:02 发表评论

Project Track - a JSF/Spring/Hibernate/Acegi example application

Thomas — Mon, 28 May 2007 09:18:00 GMT

http://code.google.com/p/projecttrack/

The original version of Project Track appeared as the example application in Kito Mann's JavaServer Faces in Application. Chris Richardson, author of POJOs in Action, then developed Spring, and Hibernate backend, integrated Acegi Security, and wrote some Selenium tests.

The goal is for Project Track to be an example of how to build applications with JSF, Spring, Hibernate, and Acegi Security.

# Non-members may check out a read-only working copy anonymously over HTTP.
svn checkout http://projecttrack.googlecode.com/svn/trunk/ projecttrack

Links:

Overview of Project Track
JavaOne presentation about Project Track
Fisheye view of Project Track

Groups:

Project Track discussion

Thomas 2007-05-28 17:18 发表评论

Thomas — Wed, 25 Apr 2007 07:53:00 GMT

内容提要�Q�本文系本�h在��用Hibernate�q�程中遇到的一些异常及相应的解��x��法�?br>
异常1�Q�not-null property references a null or transient value
解决�Ҏ��Q�将“一对多”关系中的“一”方，not-null讄��?span style="font-weight: bold;">false
�Q�参考资料：http://www.thearcmind.com/confluence/pages/viewpage.action?pageId=212�Q?br>
异常2�Q�org.hibernate.TransientObjectException: object references an unsaved transient instance
解决�Ҏ��Q?span style="font-weight: bold;">cascade="save-update,persist"
�Q�参考资料：http://www.laliluna.de/254.html�Q?br>
异常3�Q�org.hibernate.QueryException: could not resolve property
解决�Ҏ��Q?from Category category where category.userID = :userID"修改�?from Category category where userID = :userID"或�?from Category category where category.user.id = :userID"
�Q�参考资料：http://www.laliluna.de/277.html�Q?br>
异常4�Q�could not initialize proxy - the owning Session was closed
解决�Ҏ��Q�设�|?span style="font-weight: bold;">lazy�?span style="font-weight: bold;">false
�Q�参考资料：http://forum.springframework.org/showthread.php?t=27993�Q?br>

Thomas 2007-04-25 15:53 发表评论