java - 多对多，带有 Hibernate 和用于自引用的注释

Question

一想到这个我的脑袋就开始疼了，是不是就这么简单:

@ManyToMany(mappedBy = "following", cascade = CascadeType.ALL)
private Set<User> followers = new HashSet<User>();

@ManyToMany(mappedBy = "followers", cascade = CascadeType.ALL)
private Set<User> following = new HashSet<User>();

Answer 1

类似于:

@ManyToMany(mappedBy = "following", cascade = CascadeType.ALL)
@JoinTable(name="UserRel", 
                joinColumns={@JoinColumn(name="ParentId")}, 
                inverseJoinColumns={@JoinColumn(name="UserId")})
private Set<User> followers = new HashSet<User>();

@ManyToMany(cascade = CascadeType.ALL)
@JoinTable(name="UserRel", 
                joinColumns={@JoinColumn(name="UserId")}, 
                inverseJoinColumns={@JoinColumn(name="ParentId")})
private Set<User> following = new HashSet<User>();