JPA manyTo Mnay Entity mapping

 https://www.callicoder.com/hibernate-spring-boot-jpa-many-to-many-mapping-example/

package com.example.demo.hibernetexample.posttag.entity;

import jakarta.persistence.*;
import lombok.*;

import java.util.HashSet;
import java.util.Set;

@Entity
@Table(name = "post")
@NoArgsConstructor
@AllArgsConstructor
@Getter
@Setter
@Builder
@ToString
public class Post {
    @Id
    @GeneratedValue(strategy = jakarta.persistence.GenerationType.IDENTITY)
    @Column(name = "post_id")
    private Integer postId;
    @Column(name = "post_name")
    private String postName;
    @ManyToMany(cascade = { CascadeType.ALL },fetch = FetchType.EAGER)
    @JoinTable(name = "post_tags", joinColumns = {
        @JoinColumn(name = "post_id", referencedColumnName = "post_id")
    }, inverseJoinColumns = {
        @JoinColumn(name = "tag_id", referencedColumnName = "tag_id")
    })

@JsonManagedReference
    private Set<Tags> tags = new HashSet<Tags>();
}

package com.example.demo.hibernetexample.posttag.entity;

import jakarta.persistence.*;
import lombok.*;

import java.util.HashSet;
import java.util.Set;

@Entity
@Table(name = "tags")
@AllArgsConstructor
@NoArgsConstructor
@Getter
@Setter
@Builder
@ToString
public class Tags {
    @Id
    @GeneratedValue(strategy = jakarta.persistence.GenerationType.IDENTITY)
    @Column(name = "tag_id")
    private Integer tagId;
    @Column(name = "tag_name")
    private String tagName;
    @ManyToMany(mappedBy = "tags", cascade = { CascadeType.ALL },fetch = FetchType.EAGER)
    

@JsonBackReferenceprivate

 Set<Post> posts = new HashSet<Post>();
}