我正在工作 Spring JPA Hibernate 項(xiàng)目并希望將圖像從 Image Url 保存到 Mysql 數(shù)據(jù)庫(kù)。我正在使用從 Rest Service 獲取的圖像 URL 傳遞 Orders DTO 數(shù)據(jù)。如何將圖像 url 作為圖像保存到數(shù)據(jù)庫(kù)。我認(rèn)為我們必須首先從 Url 獲取圖像。請(qǐng)解決這個(gè)問(wèn)題。訂單DO.java@Table(name = "ORDER")public class OrderDO  implements Serializable{    @Column(name = "ORDER_NUMBER", nullable = false)    private String orderNumber;     @OneToMany(cascade = CascadeType.ALL, mappedBy="order")    private Set<OrderItemDO> items = new HashSet<>();}訂單項(xiàng)DO.java@Table(name = "ORDER_ITEM")public class OrderItemDO implements Serializable{       @Column(name = "PRODUCT_NAME",nullable = false)    private String name;    @Lob    @Column(name = "IMAGE")    private byte[] image;    @ManyToOne(cascade=CascadeType.ALL)    @JoinColumn(name="ORDER_ID", referencedColumnName="ID")    private OrderDO order;}訂單倉(cāng)庫(kù).java@Repositorypublic interface OrderRepository extends CrudRepository<OrderDO, Long>{    public Page<OrderDO> findAll(Pageable pageable);    }OrderServiceImpl.javapublic class OrderServiceImpl {    @Autowired    private ModelMapper modelMapper;    @Autowired    private OrderRepository orderRepository;    private OrderDO map(Order dto) {        OrderDO orderDO =  modelMapper.map(dto, OrderDO.class);        Set<OrderItemDO> itemsDO = new HashSet<>();        for(OrderItem item : dto.getItems()) {            OrderItemDO itemDO = map(item);            itemDO.setOrder(orderDO);            itemsDO.add(itemDO);        }        orderDO.setItems(itemsDO);              return orderDO;     }    public OrderItemDO map(OrderItem dto) {        OrderItemDO itemDO = modelMapper.map(dto, OrderItemDO.class);        return itemDO;    }    public Order SaveOrder(Order dto) {        OrderDO entity = this.map(dto);        entity = orderRepository.save(entity);        return this.map(entity);    }