MapStruct映射器返回空的映射对象

Question

我试图使用MapStruct在dto和实体对象之间映射convert，但是生成的映射器实现只返回空的映射对象。

BeermapperImpl

@Generated(
    value = "org.mapstruct.ap.MappingProcessor",
    date = "2020-11-05T07:42:21+0800",
    comments = "version: 1.3.0.Final, compiler: javac, environment: Java 11 (Oracle Corporation)"
)
@Component
public class BeerMapperImpl implements BeerMapper {

    @Override
    public BeerDto beerToBeerDto(Beer beer) {
        if ( beer == null ) {
            return null;
        }

        BeerDto beerDto = new BeerDto();

        return beerDto;
    }
}

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <optional>true</optional>
</dependency>
<dependency>
    <groupId>org.mapstruct</groupId>
    <artifactId>mapstruct</artifactId>
    <version>1.3.0.Final</version>
</dependency>

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.8.0</version>
    <configuration>
        <annotationProcessorPaths>
            <path>
                <groupId>org.mapstruct</groupId>
                <artifactId>mapstruct-processor</artifactId>
                <version>1.3.0.Final</version>
            </path>
            <path>
                <groupId>
                    org.projectlombok
                </groupId>
                <artifactId>lombok</artifactId>
                <version>${lombok.version}</version>
            </path>
        </annotationProcessorPaths>
        <compilerArgs>
            <compilerArg>
                -Amapstruct.defaultComponentModel=spring
            </compilerArg>
        </compilerArgs>
    </configuration>
</plugin>

@Mapper(uses = {DateMapper.class})
public interface BeerMapper {
    BeerDto beerToBeerDto(Beer beer);
    Beer beerDtoToBeer(Beer dto);
}

任何人都可以提供我的代码可能出错的地方？谢谢！

Answer 1

我在将spring boot starter从2.3.5版降级到2.1.5版后解决了这个问题。