Question

我正在尝试使用Spring如下注入一个映射器对象（类为TypeMapper）依赖项，

@Mapper(componentModel = "spring",
        uses = {TypeMapper.class})
public interface AttachmentMapper {

  AttachmentMapper MAPPER = Mappers.getMapper(AttachmentMapper.class);

  @Mappings({
      @Mapping(source = "type", target = "type") })
  AttachmentDTO toDTO(Attachment attachment);
}

TypeMapper的代码如下，

@Component
@Mapper
public abstract class TypeMapper {

  public abstract Type mapType(DtoType DtoType);

  @InheritConfiguration(name = "mapType")
  public abstract DtoType mapDtoType(Type type);
}

之后是生成的AttachmentMapperImpl代码，

public class AttachmentMapperImpl implements AttachmentMapper {

    @Autowired

    private TypeMapper typeMapper;

    public AttachmentDto toDTO(Attachment attachment) {

    if ( attachment == null) {
        return null;
    }

    attachmentDTO.setType(typeMapper.mapDtoType(attachment.getType()));

    return attachmentDTO;
}

问题出在生成的代码中，@Autowired typeMapper为空。谁能说明我在这里做错了什么？

Answer 1

TypeMapper不使用弹簧componentModel。您需要从@Component中删除TypeMapper，而使用@Mapper(componentModel = "spring")。

如果您使用AttachmentMapper MAPPER = Mappers.getMapper(AttachmentMapper.class);来获取映射器，那么这是错误的，因为Mappers工厂只能与default componentModel一起使用。如果您使用的是Spring，则应该注入您的映射器。

使用componentModel =“ spring”的Mapstruct依赖项注入提供了空对象

1 个答案: