在JPA中保存具有ManyToOne关系的数据库中的实体列表

@Entity
public class Order {
    // 其他属性...

    @OneToMany(mappedBy = "order")
    private List<OrderItem> orderItems;

    // getter和setter方法...
}

@Entity
public class OrderItem {
    // 其他属性...

    @ManyToOne
    @JoinColumn(name = "order_id")
    private Order order;

    // getter和setter方法...
}

Order order = new Order();
List<OrderItem> orderItems = new ArrayList<>();
orderItems.add(new OrderItem());
orderItems.add(new OrderItem());
order.setOrderItems(orderItems);

@Repository
public interface OrderRepository extends CrudRepository<Order, Long> {
    // 其他方法...
}

@Autowired
private OrderRepository orderRepository;

orderRepository.save(order);