@JsonIgnore正常关系下正常工作，但是当我对同一实体应用多对多时，它不起作用

Question

@JsonIgnore在关系应用于同一实体时不起作用，但在与不同实体的关系中使用时效果良好。我想用它来停止json的递归问题。有没有办法解决这个问题或使用不同于@json的方法Ignore，如果有人知道答案，请与我分享问题的原因，这样我就可以在未来。提前谢谢。

package com.socialapp.model;
import com.fasterxml.jackson.annotation.JsonIgnore;
import javax.persistence.*;
import java.util.HashSet;
import java.util.Set;
@Entity
@Table(name = "users")
public class User {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
@Column(unique = true,name = "username")
private String Username;
@Column(unique = true,name = "mail")
private String mail;
@Column(name = "password")
private String password;
@JsonIgnore //this is a one to many relationship with entity post works fine
@OneToMany(mappedBy = "poster")
private Set<Post>  posts= new HashSet<>();
@JsonIgnore //this is a many to many relationship with entity post works fine
@ManyToMany(mappedBy = "likers")
private Set<Post> postsLiked = new HashSet<>();

@ManyToMany
@JoinTable(
name = "follow",
joinColumns = @JoinColumn(name = "followers"),
inverseJoinColumns = @JoinColumn(name = "following")
)
private Set<User> Followers = new HashSet<>();
@JsonIgnore  //this is a many to many relationship with the same entity @jsonignore doesn't work
@ManyToMany(mappedBy = "Followers")
private Set<User> Following = new HashSet<>();

public User(String username, String mail, String password) {
Username = username;
this.mail = mail;
this.password = password;
}
public User() {
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getUsername() {
return Username;
}
public void setUsername(String username) {
Username = username;
}
public String getMail() {
return mail;
}
public void setMail(String mail) {
this.mail = mail;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Set<Post> getPosts() {
return posts;
}
public void setPosts(Set<Post> posts) {
this.posts = posts;
}
public Set<Post> getPostsLiked() {
return postsLiked;
}
public void setPostsLiked(Set<Post> postsLiked) {
this.postsLiked = postsLiked;
}
public Set<User> getFollowers() {
return Followers;
}
public void setFollowers(Set<User> followers) {
Followers = followers;
}
public Set<User> getFollowing() {
return Following;
}
public void setFollowing(Set<User> following) {
Following = following;
}
public void addFollower(User following){
this.Followers.add(following);
}
}

"id"：1."邮件"："[e-mail]&"；，"密码"："78824381〃；，"追随者"：[{"id"：2."邮件"："[e-mail]&"；，"密码"："123456"；，"追随者"：[]，"以下"：[{"id"：1."邮件"："[e-mail]&"；，"密码"："78824381〃；，"追随者"：[{"id"：2."邮件"："[e-mail]&"；，"密码"："123456"；，"追随者"：[]，"以下"：[{"id"：1."邮件"："[e-mail]&"；，"密码"："78824381〃；，"追随者"：[{"id"：2."邮件"："[e-mail]&"；，"密码"："123456"；，"追随者"：[]，"以下"：[{"id"：1."邮件"："[e-mail]&"；，"密码"："78824381〃；，"追随者"：[{"id"：2."邮件"："[e-mail]&"；，"密码"："123456"；，"追随者"：[]，"以下"：[{"id"：1."邮件"："[e-mail]&"；，"密码"："78824381〃；，"追随者"：[{"id"：2，

Answer 1

我想你的答案就在这里https://www.baeldung.com/jackson-bidirectional-relationships-and-infinite-recursion

请注意第3段以及注释@JsonManagedReference和@JsonBackReference。

通过使用JsonManagedReference，可以避免循环依赖性问题。