java - createCriteria 和 createAlias 的区别

Question

我在这里阅读 hibernate 标准文档:

http://docs.jboss.org/hibernate/orm/3.6/javadocs/org/hibernate/Criteria.html

我用过很多次，我通常使用createAlias()来连接表，这里他们提供了两种方法来连接和从表中获取数据，有:

 List cats = session.createCriteria(Cat.class)
     .createCriteria("kittens")
         .add( Restrictions.like("name", "Iz%") )
     .list();

 List cats = session.createCriteria(Cat.class)
     .createAlias("kittens", "kit")
     .add( Restrictions.like("kit.name", "Iz%") )
     .list();

所以我无法区分 .createCriteria("kittens") 和 createAlias("kittens", "kit") 之间的区别，或者我可能不是了解这段代码的确切作用，有人可以帮助我消除困惑。

Answer 1

The only difference is that CreateCriteria has 2 additional overloads without the alias parameter, this difference is long gone in the latest versions.

But essentially the application is slightly different in its usage is that CreateCriteria uses its relations of mapping from parent to child, whilst with CreateAlias you defined them with your customized alias names from the root.

阅读更多 here .