Hibernate from entry to Mastery (11) Multi-pair multi-directional correlation mapping

Last time we were in hibernate from getting started to mastering (10) Multi-directional and multiple one-way association mapping to explain the multiple to multiple one-way association mapping, this time we explain the last of the seven mappings in a Many-to-many bidirectional association mapping.

Multi-pair multi-directional correlation mapping

According to our previous practice, first look at the relevant class diagram and code, as follows:

public class Role {private int id;      
    private String name;  
          
    Private Set users;  
    public int getId () {return id;  
    The public void setId (int id) {this.id = ID;  
    Public String GetName () {return name;  
    public void SetName (String name) {this.name = name;  
    Public Set Getusers () {return users;  
    public void Setusers (Set users) {this.users = users;       
    The public class User {private int id;  
    private String name;  
          
    private Set roles;  
    public int getId () {return id;  
    The public void setId (int id) {this.id = ID;  
    Public String GetName () {return name;  
    public void SetName (String name) {this.name = name;  
    Public Set GetRoles () {return roles; public void Setroles (Set roles) {this.roles = roles; }  
}

Next, we compare the previous blog hibernate from Getting Started to mastering (10) Multiple to multiple one-way correlation mapping in multi-directional and multiple one-way correlation mapping, to analyze the multiple bidirectional correlation mapping, and to realize the difference and connection between them.