Java中MapStruct入门使用及对比

<dependency>
    <groupId>org.mapstruct</groupId>
    <artifactId>mapstruct</artifactId>
    <version>1.4.2.Final</version> <!-- 使用最新版本 -->
</dependency>

implementation 'org.mapstruct:mapstruct:1.4.2.Final' // 使用最新版本
annotationProcessor 'org.mapstruct:mapstruct-processor:1.4.2.Final'

@Mapper
public interface CarMapper {
    CarDto carToCarDto(Car car);
}

@Mapper
public interface CarMapper {
    @Mapping(source = "make", target = "manufacturer")
    CarDto carToCarDto(Car car);
}

CarMapper carMapper = Mappers.getMapper(CarMapper.class);
CarDto carDto = carMapper.carToCarDto(car);

public interface FromConverter<T, FROM> {

    T from(FROM from);

    List<T> from(List<FROM> list);

    default PageBean<T> from(PageBean<FROM> page) {
        PageBean<T> result = new PageBean<>();
        result.setTotalElements(page.getTotalElements());
        result.setNumber(page.getNumber());
        result.setSize(page.getSize());
        result.setTotalPages(page.getTotalPages());
        result.setNumberOfElements(page.getNumberOfElements());
        result.setContent(this.from(page.getContent()));
        return result;
    }

    default PageBean<T> from(IPage<FROM> page) {
        PageBean<T> result = new PageBean<>();
        result.setTotalElements((int) page.getTotal());
        result.setNumber((int) page.getCurrent());
        result.setSize((int) page.getSize());
        result.setTotalPages((int) page.getPages());
        result.setNumberOfElements(page.getRecords().size());
        result.setContent(this.from(page.getRecords()));
        return result;
    }
}

public interface PropertyCopier<TARGET, T> {
    void copy(@MappingTarget TARGET target, T t);
}

public interface ToConverter<T, TO> {
    TO to(T t);

    List<TO> to(List<T> list);

    default PageBean<TO> to(PageBean<T> page) {
        PageBean<TO> result = new PageBean<>();
        result.setTotalElements(page.getTotalElements());
        result.setNumber(page.getNumber());
        result.setSize(page.getSize());
        result.setTotalPages(page.getTotalPages());
        result.setNumberOfElements(page.getNumberOfElements());
        result.setContent(this.to(page.getContent()));
        return result;
    }

    default PageBean<TO> to(IPage<T> page) {
        PageBean<TO> result = new PageBean<>();
        result.setTotalElements((int) page.getTotal());
        result.setNumber((int) page.getCurrent());
        result.setSize((int) page.getSize());
        result.setTotalPages((int) page.getPages());
        result.setNumberOfElements(page.getRecords().size());
        result.setContent(this.to(page.getRecords()));
        return result;
    }
}

public interface TwoWayConverter<SRC, DEST> extends ToConverter<SRC, DEST>, FromConverter<SRC, DEST> {
}

@Data
public class ChatbotDTO {

    private Integer id;
    private String question;
    private String response;
    private Date createTime;
    private Integer isDelete;

    @Mapper(unmappedTargetPolicy = ReportingPolicy.IGNORE)
    public interface Converter extends FromConverter<ChatbotDTO, Chatbot> {
        Converter INSTANCE = Mappers.getMapper(Converter.class);
    }
}

@Data
public class Chatbot extends Model<Chatbot> {
    private Integer id;
    private String question;
    private String response;
    private Date createTime;
    private Integer isDelete;
}