Spring Boot MapStrutr针对内部对象的空策略
我正在尝试使用MapStrut和java映射两个类似的对象:Spring Boot MapStrutr针对内部对象的空策略,spring,spring-boot,null,automapper,mapstruct,Spring,Spring Boot,Null,Automapper,Mapstruct,我正在尝试使用MapStrut和java映射两个类似的对象: @Data @NoArgsConstructor public class EventDTO { @JsonInclude(Include.NON_NULL) private EventStatusDTO eventStatus; } @Data @NoArgsConstructor public class EventStatusDTO { @JsonInclude(Include.NON_NULL) pri
@Data
@NoArgsConstructor
public class EventDTO {
@JsonInclude(Include.NON_NULL)
private EventStatusDTO eventStatus;
}
@Data
@NoArgsConstructor
public class EventStatusDTO {
@JsonInclude(Include.NON_NULL)
private String statusCode;
@JsonInclude(Include.NON_NULL)
private String statusDescription;
}
@Data
@NoArgsConstructor
public class Event {
private String statusCode;
}
当状态代码为null时,我希望EventStatusDTO对象中的所有EventStatusDTO对象都为null。但是像这样定义映射器:
@Mappings({
@Mapping(target = "voltageLevel.voltageLevelCode", source = "voltageLevelCode"),
@Mapping(target = "eventStatus.statusCode", source = "statusCode", nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.SET_TO_NULL),
@Mapping(target = "eventType.typeCode", source = "typeCode", nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.SET_TO_NULL),
@Mapping(target = "eventCause.causeCode", source = "causeCode", nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.SET_TO_NULL)
})
public abstract EventDTO fromEntityToDTO(Event source);
我只能在EventDTO中生成一个空对象EventStatusDTO
这是生成的代码:
protected EventCauseDTO eventToEventCauseDTO(Event event) {
if ( event == null ) {
return null;
}
EventCauseDTO eventCauseDTO = new EventCauseDTO();
eventCauseDTO.setCauseCode( event.getCauseCode() );
return eventCauseDTO;
}
我能让这更像谁
protected EventCauseDTO eventToEventCauseDTO(Event event) {
if ( event == null ) {
return null;
}
EventCauseDTO eventCauseDTO = null;
if(event.getCauseCode() != null) {
eventCauseDTO = new EventCauseDTO();
eventCauseDTO.setCauseCode(event.getCauseCode());
}
return eventCauseDTO;
}
我一直在用mapStruct的一些nullValueStrategies进行测试,但什么都没有。。。我不想使用@AfterMapping来检查所有空对象
提前感谢。这不受MapStruct支持,当尝试映射嵌套的目标对象时,您无法控制是什么导致该bean(
EventCauseDTO
)为null
在您的示例中,它看起来非常简单,因为它是单个参数。然而,这会很快变得复杂。可能有多个参数,任意数量的参数都可能导致目标对象为空或不为空
我建议在String
和EventCauseDTO
之间提供一个自定义映射
e、 g
如果执行此操作,那么将对源参数进行null
检查,并且null
将针对fromCause
方法中的EventCauseDTO
返回
@Mapper
public interface EventMapper {
@Mapping(target = "voltageLevel.voltageLevelCode", source = "voltageLevelCode"),
@Mapping(target = "eventStatus.statusCode", source = "statusCode")
@Mapping(target = "eventType.typeCode", source = "typeCode")
@Mapping(target = "eventCause", source = "causeCode")
EventDTO fromEntityToDTO(Event source);
@Mapping( target = "causeCode", source = "cause")
EventCauseDTO fromCause(String cause);
}