Hibernate from Getting started to mastering (10) Multiple to multiple one-way correlation mapping

Previous article hibernate from getting started to mastering (ix) A pair of multiple bidirectional association mappings we explained the relevant content of a one-to-many correlation mapping, this time we continue to multiple one-way association mappings.

Multi-pair multiple one-way association mappings

Before explaining the multiple to multiple one-way association mapping, first look at the relevant class diagram and code, as follows:

public class Role {  
    private int id;   
    private String name;  
          
    public int getId () {return  
        ID;  
    }  
    public void setId (int id) {  
        this.id = ID;  
    }  
    Public String GetName () {return  
        name;  
    }  
    public void SetName (String name) {  
        this.name = name;  
    }  
}  
      
public class User {   
    private int id;   
    private String name;  
    private Set roles;  
          
    public int getId () {return  
        ID;  
    }  
    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;  
    }  
}