springmvc hibernate的多对一和一对多，多对多，一对一注解关系

[Man_Jiang]

springmvc hibernate的多对一和一对多，多对多，一对一注解关系

[拉牙齿晒太阳]

这个很简单的啊，网上多的是啊

[「已注销」]

一对一 @OneToOne(fetch = FetchType.LAZY) @JoinColumn(name = "THEMEID") @Cascade({CascadeType.ALL}) private BasTsTheme basTsTheme; 一对多 @OneToMany( fetch = FetchType.LAZY, mappedBy = "basTsGrade") @Cascade({CascadeType.DELETE_ORPHAN,CascadeType.SAVE_UPDATE}) private Set<BasTsUser> basTsUsers = new HashSet<BasTsUser>(0); 多对一 @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "GRADEID") @Cascade({CascadeType.SAVE_UPDATE}) private BasTsGrade basTsGrade; 多对多 @ManyToMany( fetch = FetchType.LAZY, mappedBy = "basTsRoles") @Cascade({CascadeType.DELETE_ORPHAN,CascadeType.SAVE_UPDATE}) private Set<BasTsUser> basTsUsers = new HashSet<BasTsUser>(0); @ManyToMany( fetch = FetchType.LAZY) @JoinTable(name = "BAS_TR_ROLEUSER", schema = "DESK", joinColumns = { @JoinColumn(name = "USERID", nullable = false, updatable = false) }, inverseJoinColumns = { @JoinColumn(name = "ROLEID", nullable = false, updatable = false) }) @Cascade({ CascadeType.DELETE_ORPHAN, CascadeType.SAVE_UPDATE }) private Set<BasTsRole> basTsRoles; 简单解释下，在一对一关系中，每个用户只有一个主题，通过themeid关联 一对多和多对一结合起来看，grade即会员等级，一个会员只能有一个等级，一个等级有多个会员。 多对多是典型的用户和角色关系，不解释