Question

源类：

class ReportSettings {
    private HeaderSettings headerSettings;
    private FooterSettings footerSettings;

    // getters and setters omitted
}

class HeaderSettings {
    private boolean showLogo;

    // getters and setters omitted
}

class FooterSettings {
    private boolean showPageNumber;

    // getters and setters omitted
}

目标类别：

class Parameters {
    private String group;
    private String name;
    private String value;

    // getters and setters omitted
}

是否可以使用MapStruct将ReportSettings对象转换为List<Parameters>对象，如下所示，其中ReportSettings类的字段名称映射到Parameter类的{{ 1}}字段：

group

Answer 1

据我所知，尚无此类功能可根据字段名称动态创建列表。

我想到的唯一想法是一个真正的静态解决方案，但是我想您有一个动态的字段列表，并且不能以这种方式完成。

@Mapper
public abstract class ReportSettingsMapper {

  @Mappings({
    @Mapping(target = "group", constant = "headerSettings"),
    @Mapping(target = "name", constant = "showLogo"),
    @Mapping(target = "value", source = "headerSettings.showLogo")
  })
  protected abstract Parameters mapHeaderSettings(ReportSettings settings);

  @Mappings({
    @Mapping(target = "group", constant = "footerSettings"),
    @Mapping(target = "name", constant = "showPageNumber"),
    @Mapping(target = "value", source = "footerSettings.showPageNumber")
  })
  protected abstract Parameters mapFooterSettings(ReportSettings settings);

  public List<Parameters> mapReportSettings(ReportSettings settings) {
    List<Parameters> parameters = new ArrayList<>();
    parameters.add( mapHeaderSettings(settings) );
    parameters.add( mapFooterSettings(settings) );

    return parameters;
  }
}

（未经测试的代码；如果使用Java> = 8，则可以使用具有默认方法的接口+删除@Mappings容器注释）

mapstruct：将字段名称映射到属性

1 个答案: