BlogJava-Gordian Yuan-最新评论http://www.blogjava.net/gordianyuan/CommentsRSS.aspxyoung programmerzh-cnWed, 15 Oct 2008 06:36:29 GMTWed, 15 Oct 2008 06:36:29 GMTcnblogsre: Hibernate OneToOneSecondPass NullPointerExceptionhttp://www.blogjava.net/gordianyuan/archive/2008/10/06/222296.html#232712暴雨落葉(Gordian)暴雨落葉(Gordian)Mon, 06 Oct 2008 09:11:00 GMThttp://www.blogjava.net/gordianyuan/archive/2008/10/06/222296.html#232712你好
Caused by: java.lang.NullPointerException
at org.hibernate.cfg.OneToOneSecondPass.doSecondPass(OneToOneSecondPass.java:135)
这个异常是出现在我一个类依赖另一个类来生成主键的时候产生
这时候应该注意的是mapping class的声明顺序,
例如下面,如果Role类依赖User的某个属性(例如我的情况是Role使用foreign key generator根据User的主键生成Role的主键)
这时候就需要先声明User然后声明Role,否则会出现上面的异常.
<hibernate-configuration>
<session-factory>
<mapping class="model.User" />
<mapping class="model.Role" />
</session-factory>
</hibernate-configuration>
希望能帮上你的忙
gordian

暴雨落葉(Gordian) 2008-10-06 17:11 发表评论
]]>re: Hibernate OneToOneSecondPass NullPointerExceptionhttp://www.blogjava.net/gordianyuan/archive/2008/10/06/222296.html#232625havenhavenMon, 06 Oct 2008 03:45:00 GMThttp://www.blogjava.net/gordianyuan/archive/2008/10/06/222296.html#232625

haven 2008-10-06 11:45 发表评论
]]>re: Suppress xml grammar warninghttp://www.blogjava.net/gordianyuan/archive/2008/10/04/221641.html#232387bye@bye.combye@bye.comSat, 04 Oct 2008 13:26:00 GMThttp://www.blogjava.net/gordianyuan/archive/2008/10/04/221641.html#232387

bye@bye.com 2008-10-04 21:26 发表评论
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