spring - MapStruct - @Mapper 注释不创建 bean

Question

我从这个来源下载了应用程序 https://github.com/springframeworkguru/spring5-mvc-rest/tree/vendor-api
我对 MapStruct 有问题。

@Mapper
public interface CategoryMapper {

CategoryMapper INSTANCE = Mappers.getMapper(CategoryMapper.class);


CategoryDTO categoryToCategoryDTO(Category category);

}

@Data
public class CategoryDTO {
    private Long id;
    private String name;
}

域类:

@Data
@Entity
public class Category {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
}

服务等级:

@Service
public class CategoryServiceImpl implements CategoryService {

    private final CategoryMapper categoryMapper;
    private final CategoryRepository categoryRepository;

    public CategoryServiceImpl(CategoryMapper categoryMapper, CategoryRepository categoryRepository) {
        this.categoryMapper = categoryMapper;
        this.categoryRepository = categoryRepository;
    }
}

在 pom.xml 依赖项中，我只粘贴了两个::

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
    <org.mapstruct.version>1.2.0.CR2</org.mapstruct.version>
</properties>
<dependency>
        <groupId>org.mapstruct</groupId>
        <artifactId>mapstruct-jdk8</artifactId>
        <version>${org.mapstruct.version}</version>
</dependency>

和插件:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.7.0</version>
    <configuration>
        <source>1.8</source>
        <target>1.8</target>
        <annotationProcessorPaths>
            <path>
                 <groupId>org.projectlombok</groupId>
                 <artifactId>lombok</artifactId>
                 <version>${lombok.version}</version>
            </path>
            <path>
                 <groupId>org.mapstruct</groupId>
                 <artifactId>mapstruct-processor</artifactId>
                 <version>${org.mapstruct.version}</version>
           </path>
        </annotationProcessorPaths>
        <compilerArgs>
           <compilerArg>
                 -Amapstruct.defaultComponentModel=spring
           </compilerArg>
        </compilerArgs>
    </configuration>
</plugin>

描述:

Parameter 0 of constructor in 
guru.springfamework.services.CategoryServiceImpl required a bean of type 'guru.springfamework.api.v1.mapper.CategoryMapper' that could not be found.

行动:

Consider defining a bean of type 'guru.springfamework.api.v1.mapper.CategoryMapper' in your configuration.

我认为在我的 Intellij 注释中，@Mapper 不要为映射器创建一个 bean。
我没有更改 John GitHub 的代码。
任何的想法？
我试图将路径生成的源更改为目标，但这无济于事
感谢帮助。

Answer 1

我通过执行解决了错误

mvn 全新安装

也将此添加到您的 pom

   <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.7.0</version>
        <configuration>
            <source>1.8</source>
            <target>1.8</target>
            <annotationProcessorPaths>
                <path>
                    <groupId>org.projectlombok</groupId>
                    <artifactId>lombok</artifactId>
                    <version>${lombok.version}</version>
                </path>
                <path>
                    <groupId>org.mapstruct</groupId>
                    <artifactId>mapstruct-processor</artifactId>
                    <version>${org.mapstruct.version}</version>
                </path>
            </annotationProcessorPaths>
            <compilerArgs>
                <compilerArg>
                       -Amapstruct.defaultComponentModel=spring
                </compilerArg>
            </compilerArgs>
        </configuration>
    </plugin>