Java 使用MapStruct将2个字符串字段映射到OffsetDateTime

我有以下DTO，其中有2个字段必须转换为OffsetDateTime：

@Data
public class AppointmentDTO {

    private String id;

    @NotNull
    private String startTime;

    @NotNull
    private String endTime;

    @NotNull
    private String timeZoneStart;

    @NotNull
    private String timeZoneEnd;

    // other fields
} 

到

为了转换，我需要DTO的

时区

字段加上

日期时间格式

。因此，我的尝试是：

@Component
@Mapper(componentModel = "spring")
public interface IAppointmentMapper {

    @Mapping(target = "createdTime", ignore = true)
    Appointment convertAppointmentDTOToAppointment(AppointmentDTO dto, @Context OffsetDateTimeMapper offsetDateTimeMapper);
}

但是，当我构建时，我得到以下错误：

error:（22,17）java:无法将属性“java.lang.String startTime”映射到“java.time.OffsetDateTime startTime”。考虑声明/实现映射方法：“java. Time.OffStestDATE-TimeMmap（JavaLang.Stand value）”.< /Cord>如果在接口上放置<代码>默认MAP（）/代码>方法，则不会出错，但我没有正确的<代码>上下文上下文/代码>。

/*default OffsetDateTime map(String value) {
     LocalDateTime localDateTime = LocalDateTime.parse(value);
     ZonedDateTime zonedDateTime = localDateTime.atZone(ZoneOffset.UTC);
     return zonedDateTime.toOffsetDateTime();
}*/

你的方法很有趣。为了正常工作，必须显式忽略不希望MapStruct自动映射的属性

在这种情况下，添加：

@Mapping(target = "startTime", ignore = true)
@Mapping(target = "endTime", ignore = true)

但是，在您的情况下，我将尝试使用源参数作为源参数

比如：

@Component
@Mapper(componentModel = "spring")
public interface IAppointmentMapper {

    @Mapping(target = "createdTime", ignore = true)
    @Mapping(target = "startTime", source = "dto", qualifiedByName = "startTime")
    @Mapping(target = "endTime", source = "dto", qualifiedByName = "endTime")
    Appointment convertAppointmentDTOToAppointment(AppointmentDTO dto, @Context DateTimeFormatter dateTimeFormatter);

    @Named("startTime")
    default OffsetDateTime mapStartTime(AppointmentDTO dto, @Context DateTimeFormatter dateTimeFormatter) {

        LocalDateTime localDateTime = LocalDateTime.parse(dto.getStartTime(), dateTimeFormatter); 
        ZonedDateTime zonedDateTime = localDateTime.atZone(ZoneId.of(dto. getTimeZoneStart()));
        return zonedDateTime.toOffsetDateTime()
    }

    @Named("endTime")
    default OffsetDateTime mapEndTime(AppointmentDTO dto, @Context DateTimeFormatter dateTimeFormatter) {

        LocalDateTime localDateTime = LocalDateTime.parse(dto.getEndTime(), dateTimeFormatter); 
        ZonedDateTime zonedDateTime = localDateTime.atZone(ZoneId.of(dto. getTimeZoneEnd()));
        return zonedDateTime.toOffsetDateTime()
    }
}

注：
@Named
是
org.mapstruct.Named

@Mapping(target = "startTime", ignore = true)
@Mapping(target = "endTime", ignore = true)

@Component
@Mapper(componentModel = "spring")
public interface IAppointmentMapper {

    @Mapping(target = "createdTime", ignore = true)
    @Mapping(target = "startTime", source = "dto", qualifiedByName = "startTime")
    @Mapping(target = "endTime", source = "dto", qualifiedByName = "endTime")
    Appointment convertAppointmentDTOToAppointment(AppointmentDTO dto, @Context DateTimeFormatter dateTimeFormatter);

    @Named("startTime")
    default OffsetDateTime mapStartTime(AppointmentDTO dto, @Context DateTimeFormatter dateTimeFormatter) {

        LocalDateTime localDateTime = LocalDateTime.parse(dto.getStartTime(), dateTimeFormatter); 
        ZonedDateTime zonedDateTime = localDateTime.atZone(ZoneId.of(dto. getTimeZoneStart()));
        return zonedDateTime.toOffsetDateTime()
    }

    @Named("endTime")
    default OffsetDateTime mapEndTime(AppointmentDTO dto, @Context DateTimeFormatter dateTimeFormatter) {

        LocalDateTime localDateTime = LocalDateTime.parse(dto.getEndTime(), dateTimeFormatter); 
        ZonedDateTime zonedDateTime = localDateTime.atZone(ZoneId.of(dto. getTimeZoneEnd()));
        return zonedDateTime.toOffsetDateTime()
    }
}