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JoinColumn VS mappedBy

What is the difference between: @Entity public class Company {     @OneToMany(cascade = CascadeType.ALL , fetch = FetchType.LAZY)     @JoinColumn(name = "companyIdRef", referencedColu ...
darrenzhu 评论(0) 有2056人浏览 2013-05-16 17:13

@PrimaryKeyJoinColumn and mappedBy

1 ANNOTATIONS 1.1 @PrimaryKeyJoinColumn and mappedBy 1.1.1 Note @PrimaryKeyJoinColumn is an annotation, while mappedBy is only an attribute of the @OneToOne, @OneToMany, @ManyToOne and @ManyToMany 1.1 ...
darrenzhu 评论(0) 有3974人浏览 2013-05-16 16:58

hibernate的注解属性mappedBy详解

mappedBy: 1>只有OneToOne,OneToMany,ManyToMany上才有mappedBy属性,ManyToOne不存在该属性; 2>mappedBy标签一定是定义在被拥有方的,他指向拥有方; 3>mappedBy的含义,应该理解为,拥有方能够自动维护跟被拥有方的关系,当然,如果从被拥有方,通过手工强行来维护拥有方的关系也是可以做到的; 4>mappedBy ...
shenyuc629 评论(4) 有65975人浏览 2012-09-19 11:14

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