小编Ksh*_*tij的帖子

我在数据库中有这个关联 -

我希望数据像这样保存在表中 -

相应的 JPA 实体已按此方式建模（为简单起见，省略了 getter/setter）-

学生实体 -

@Entity 
@Table(name = "student")
public class Student {
    @Id
    @SequenceGenerator(name = "student_pk_generator", sequenceName = 
                              "student_pk_sequence", allocationSize = 1)
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = 
                               "student_pk_generator")
    @Column(name = "student_id", nullable = false)
    private Long studentId;

    @Column(name = "name", nullable = false)
    private String studentName;

    @OneToMany(mappedBy = "student", cascade = CascadeType.ALL)
    private Set<StudentSubscription> studentSubscription;
}

STUDENT_SUBSCRIPTION 实体 -

@Entity
@Table(name = "student_subscription")
@Inheritance(strategy = InheritanceType.JOINED)
public abstract class StudentSubscription {
    @Id
    private Long …