MapStruct嵌套映射

Question

public class TPResponse {
     protected UserListsType userLists;
     protected ProductOffers offers;
     //getters and setters
}

public class UserListsType {
    protected UserTypes userTypes;
    ...............
}

public class UserTypes{
    protected List<User> userType;
}

public class User{
 protected String userID;
}

public class ProductOffers {
    protected List<OffersType> OffersType;
}

public class OffersType{
   protected PriceType totalPrice;
}

public class ActualResponse {
       private List<Customer> user = new ArrayList<Customer>();
       //getters and setters
    }

  public class Customer{
        private String customerId;
        private String pdtPrice;
        private OfferPrice offerPrice;
    }
   public class OfferPrice{
        private String offerId;
  }

1) customerId <Map with> UserTypes->User->userID
2) pdtPrice  <Map with>  offers -> OffersType -> totalPrice
3) offerId  <Map with> sum of (offers -> OffersType -> totalPrice)

我尝试使用MapStruct编写映射器类，如下所示：

@Mapper(nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.IGNORE)
public interface UserResponseMapper {
    UserResponseMapper RESPONSE_MAPPER = Mappers.getMapper(UserResponseMapper.class);

    @Mappings({
            @Mapping(target="customer.customerId", source="userTypes.userType.userId")
    })
    ActualResponse mapUser(UserListsType userListType);

}

目前它显示了“未知属性”“customer.customerid”和“usertypes.usertype.userid”等错误。有人能帮我用MapStruct映射所有这些元素吗？

问题2：我们如何绘制跟踪图？1）customerId usertypes->user->userid 2)pdtPrice offers->OffersType->totalPrice 3）offerId总和（offers->OffersType->totalPrice）

@Mapping(target = "customerId", source = "userId")
@Mapping(target = "pdtPrice", source = "totalPrice")
    User mapUser(UserListsType userListType, OffersType offersType );

Answer 1

据我所知，您需要映射ActualResponse和UserTypeListType中的列表。

当提供某些对象之间的映射时，MapStruct可以自动生成其集合之间的映射。因此，在您的情况下，您需要执行以下操作：

@Mapper(nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.IGNORE)
public interface UserResponseMapper {
    UserResponseMapper RESPONSE_MAPPER = Mappers.getMapper(UserResponseMapper.class);

    @Mappings({
            @Mapping(target="user", source="userType")
    })
    ActualResponse mapUser(UserTypeListType userListType);

    @Mapping(target = "customerId", source = "userId")
    User mapUser(UserType userType);

}

如果你需要做计算，有来自不同层次的对象，你需要做一些分组和或聚合，我建议你写你自己的逻辑。