正如@Nathan所指出的，您可以创建一个名为Enrollment的单独类。

@Entity
@Getter
@Setter
public class Enrollment {

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

    @ManyToOne
    @JoinColumn(name = "student_id")
    Student student;

    @ManyToOne
    @JoinColumn(name = "class_id")
    Class aClass;

}

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然后将它们引用到Student中

@Entity
@Getter
@Setter
public class Student {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id", nullable = false)
    private Long id;

    @OneToMany(mappedBy = "student")
    Set<Enrollment> registrations;
}

型
Class。

@Entity
@Getter
@Setter
public class Class {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id", nullable = false)
    private Long id;

    @OneToMany(mappedBy = "aClass")
    Set<Enrollment> registrations;
}

型