早上好, 我目前正在使用 mapStruct,我想为以下对象制作一个映射器
public class StatusReasonResponse {
private final List<StatusReasonDTO> statusReasons;
}
public class StatusReasonDTO {
private Integer id;
private String code;
private String name;
private Boolean active;
private String type;
}
public class StatusReason {
private final int id;
private final String code;
private final String name;
private final boolean active;
private final StatusReasonType type;
}
我写了一个像这样的映射器
@Mapper(componentModel = "spring")
公共接口 ITestList
我想要这样的台词:
StatusReasonDTO 响应 = mapperToRespone(Listof(StatusReasonList))
像这样的映射器?
@Mapping(来源=“StatusReasonList”,目标=“statusReasons”) StatusReasonResponse toResponse(StatusReason statusReason, List statusReasonList);
这是一个如何为给定对象编写 MapStruct 映射器的示例:
@Mapper(componentModel = "spring")
public interface StatusReasonMapper {
@Mapping(source = "id", target = "id")
@Mapping(source = "code", target = "code")
@Mapping(source = "name", target = "name")
@Mapping(source = "active", target = "active")
@Mapping(source = "type", target = "type")
StatusReasonDTO toDto(StatusReason entity);
@Mapping(source = "id", target = "id")
@Mapping(source = "code", target = "code")
@Mapping(source = "name", target = "name")
@Mapping(source = "active", target = "active")
@Mapping(source = "type", target = "type")
StatusReason toEntity(StatusReasonDTO dto);
@Mapping(source = "statusReasons", target = "statusReasons")
StatusReasonResponse toResponse(List<StatusReasonDTO> statusReasons);
default List<StatusReasonDTO> toDtoList(List<StatusReason> entities) {
if (entities == null) {
return null;
}
List<StatusReasonDTO> dtos = new ArrayList<>();
for (StatusReason entity : entities) {
dtos.add(toDto(entity));
}
return dtos;
}
default List<StatusReason> toEntityList(List<StatusReasonDTO> dtos) {
if (dtos == null) {
return null;
}
List<StatusReason> entities = new ArrayList<>();
for (StatusReasonDTO dto : dtos) {
entities.add(toEntity(dto));
}
return entities;
}
}
使用此映射器,您可以使用 toDto 和 toEntity 方法轻松地在 StatusReason 和 StatusReasonDTO 对象之间进行转换。您还可以使用 toDtoList 和 toEntityList 方法来转换对象列表。
要将 List 转换为 StatusReasonResponse,可以使用 toResponse 方法,如下所示:
StatusReasonMapper mapper = Mappers.getMapper(StatusReasonMapper.class);
List<StatusReason> statusReasonList = ...; // initialize list
StatusReasonResponse response = new StatusReasonResponse(mapper.toDtoList(statusReasonList));
要从
List<StatusReason>
映射到StatusReasonResponse
,需要定义一个映射器,将列表中的每个StatusReason
映射到一个StatusReasonDTO
,然后设置StatusReasonDTO
中的StatusReasonResponse
的列表。
这是一个示例映射器接口:
@Mapper(componentModel = "spring")
public interface StatusReasonMapper {
StatusReasonDTO toDTO(StatusReason statusReason);
List<StatusReasonDTO> toDTOList(List<StatusReason> statusReasons);
StatusReasonResponse toResponse(List<StatusReason> statusReasons);
}
toDTO
方法将单个StatusReason
对象映射到一个StatusReasonDTO
。 toDTOList
方法将 StatusReason
对象列表映射到 StatusReasonDTO
对象列表。 toResponse
方法将 StatusReason
对象列表映射到 StatusReasonResponse
对象。
以下是使用映射器的方法:
List<StatusReason> statusReasons = ...; // initialize the list
StatusReasonMapper mapper = ...; // initialize the mapper
StatusReasonResponse response = new StatusReasonResponse();
response.setStatusReasons(mapper.toDTOList(statusReasons));
在这个例子中,你创建了一个新的
StatusReasonResponse
对象,并通过调用mapper的StatusReasonDTO
方法来设置它的toDTOList
对象列表。请注意,您需要在StatusReasonResponse
对象上调用'setStatusReasons'方法来设置StatusReasonDTO
对象的列表。