hibernate中many to one 和 one to many 有什么区别

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/09 02:12:09

hibernate中many to one 和 one to many 有什么区别
hibernate中many to one 和 one to many 有什么区别

hibernate中many to one 和 one to many 有什么区别
大家不要误导人.
多对一和一对多就是一回事情,哪有那么复杂?!
对于“多”的一方来看,就是多对一;对于“一”的一方来看,就是一对多.
仅仅是同一事物的不同看待角度.
我再多说两句:Hibernate中的所有关系,从本质上来看都是一对多的关系.
一对一是特殊的一对多;
多对多是两个一对多的组合,在实际使用中,通过引入中间表,多对多会被拆分成两个一对多.

hibernate中many to one 和 one to many 有什么区别 hibernate one to many classes student hibernate中 *.hbm.xml hibernate中inverse作用 简述 Hibernate 和 JDBC 的优缺点?如何书写一个 one to many 配置文件. Hibernate中one to many 和many to one 有什么区别?请朋友们帮帮我.谢谢要是能给实例比较最好了,谢谢朋友!我的意思one to many 要是反过来不就是many to one了吗?我要是把相关的配置 调换一下.那么one Hibernate中one-to-many 和 many-to-many unique=true 之间有何区别?只是看到文档上对于带中间表的一对多时,用的是后者,不带中间表时用的是前者.最近做了个测试,在带中间表的一对多时,两种情况似乎 Hibernate配置文件错误提示,The content of element type list must match ,怎么解决呢.The content of element type list must match (meta*,subselect?,cache?,synchronize*,comment?,key,(index|list-index),(element|one-to-many|many-to-many|co The Hibernate feature disbled now.You have to enable the Hibernate feature.谢 unable to build EntityManagerFactory hibernate dialect must be explicitly set many people like to go to the park on w... sql 中 select * from A left join B on A.id=B.id where A.id=?如果在Hibernate 中 用HQL 怎么表达呢 在下感激不尽. These days many students like to make friends on line. Many students go to school on foot同义句 we can see many people on our way to school. we can see many people on our way to school. hibernate中Configuration configuration=new Configuration().configure();默认读取的是hibernate.cfg.xml文件,怎么让它去读取applicationContext.xml,SH结合使用 hibernate中session与JSP中session的区别是什么?sessionFactory是啥?