spring - Mapstruct 中的嵌套映射

Question

我是 MapStruct API 的新手，谁能说一下如何进行嵌套映射。
我有两个类，一个是我实际的purchaseOrder 类，它是我的目标类，另一个是EDPurchaseOrder 类，它被称为源文件，这里不用担心我使用的命名约定，只需使用源文件和目标文件即可。

源类
源类 EDCustomerOrder 及其引用类

    public class EDCustomerOrder{
        private Integer orderID;
        private String orderNumber;
        private BigDecimal orderTotalQty;
        private String UOM;
        private PickupDTO pickupPoints;
        private Integer supplierID;
        private String supplierName;
        private String supplierNature;
        private EDAddress supplierEDAddress;
    }

    public class EDPickup{
        private List<EDPOItem> items;
    }

    public class EDAddress{
        private String addressLine1;
        private String addressLine2;
        private String addressLine3;
        private String city;
        private String state;
        private string countryCode;
        private String country;
        private String postalCode;
    }

    public class EDPOItem{
        private Integer itemID;
        private String itemCode;
        private String itemDescription;
        private Integer itemQuantity;
    }

目标类(class)
这里是我的目标类 CustomerOrder 及其引用类

    public class CustomerOrder{
        private Integer orderID;
        private String orderNumber;
        private List<Pickup> pickupPoints;
        private Supplier supplierDetail;
    }

    public class Pickup{
        private Integer pickupID;
        private Integer pickupLocationNumber;
        private List<POItem> items;
    }

    public class POItem{
        private Integer itemID;
        private String itemCode;
        private String itemDescription;
        private Integer itemQuantity;
    }

    public class Supplier{
        private Integer supplierID;
        private String supplierName;
        private String supplierNature;
        private Address supplierAddress;
    }

    public class Address{
        private String addressLine1;
        private String addressLine2;
        private String addressLine3;
        private String city;
        private String state;
        private string countryCode;
        private String country;
        private String postalCode;
    }

Answer 1

所以我想你在目标端有相同的对象层次结构，例如SongDTO , LibraryDTO和 TrackDTO .

然后你必须为每对对应的对象声明一个映射方法，通过 @Mapping 配置它。如所须:

public interface MyMapper {

    @Mapping(source="name", target="title")
    SongDTO songToDto(Song song);

    LibraryDTO libraryToDto(Library library);

    TrackDTO trackToDto(Track track);
}

然后例如 songToDto() 的生成实现将调用 libraryToDto()以便将歌曲的库映射到歌曲 DTO 的库 DTO。

另请查看 reference guide了解更多。