Hibernate-使用可嵌入的3路多对多

Question

实体（getter和setter等略）：复合键实体

@Embeddable
public class GroupUserRolesID implements Serializable {

    @Column(name = "groupID")
    private Long groupID;

    @Column(name = "groupRoleID")
    private Long groupRoleID;
    
    @Column(name = "userID")
    private Long userID;
    
    private GroupUserRolesID() {}

    public GroupUserRolesID(Long groupRoleID, Long groupID, Long userID) {
        this.groupRoleID = groupRoleID;
        this.groupID = groupID;
        this.userID = userID;
    }

@Entity(name = "GroupUserRoles")
public class GroupUserRoles {

    @EmbeddedId
    private GroupUserRolesID id;

    @ManyToOne(fetch = FetchType.LAZY)
    @MapsId("groupRoleID")
    private GroupRole groupRole;

    @ManyToOne(fetch = FetchType.LAZY)
    @MapsId("groupID")
    private Group group;

    @ManyToOne(fetch = FetchType.LAZY)
    @MapsId("userID")
    private User user;

    public GroupUserRoles(GroupRole groupRole, Group group, User user) {
        this.groupRole = groupRole;
        this.group = group;
        this.user = user;
        this.id = new GroupUserRolesID(groupRole.getId(), group.getGroupID(), user.getUserId());
    }

用户实体

 @Entity
    public class User {

    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    private Long userID;

    @Column(name = "userHashedPassword")
    private String password;

    @Column(name = "userName")
    private String userName;
    @Column(name = "userEmail")
    private String email;

    @OneToMany(mappedBy = "user")
    private Set<GroupUserRoles> groupUserRoles = new HashSet<>();