Springboot JPA在三个不同的相似表中使用相同的外键

@Entity
public class EntityA {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    // 定义外键关系
    @ManyToOne
    @JoinColumn(name = "foreign_key")
    private EntityB entityB;

    // 其他属性和方法
}

@Entity
public class EntityB {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    // 定义外键关系
    @ManyToOne
    @JoinColumn(name = "foreign_key")
    private EntityC entityC;

    // 其他属性和方法
}

@Entity
public class EntityC {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    // 其他属性和方法
}

@Repository
public interface EntityARepository extends JpaRepository<EntityA, Long> {
}

@Repository
public interface EntityBRepository extends JpaRepository<EntityB, Long> {
}

@Repository
public interface EntityCRepository extends JpaRepository<EntityC, Long> {
}

@Service
public class EntityService {
    @Autowired
    private EntityARepository entityARepository;

    @Autowired
    private EntityBRepository entityBRepository;

    @Autowired
    private EntityCRepository entityCRepository;

    public void saveEntities() {
        EntityC entityC = new EntityC();
        entityCRepository.save(entityC);

        EntityB entityB = new EntityB();
        entityB.setEntityC(entityC);
        entityBRepository.save(entityB);

        EntityA entityA = new EntityA();
        entityA.setEntityB(entityB);
        entityARepository.save(entityA);
    }

    // 其他操作方法
}