考虑在您的配置中定义一个类型为“Mapper”的 bean [Spring-Boot]

Question

mapstruct 不适用于我的 Spring 引导项目。

我在mapper接口中添加了依赖、路径、Mapper注解（componentModel="spring"），仍然报同样的错误

https://i.stack.imgur.com/CHTPo.png

https://i.stack.imgur.com/nvxo4.png

Answer 1

CategoryMapper 是实体吗？ 如果它是请添加这个 @NoArgsConstructor 因为它正在寻找空构造函数

@NoArgsConstructor
public class CategoryMapper {

    
}

如果你没有龙目岛只需添加这个

//empty constructor
public CategoryMapper() {

}

如果这个 class 是 Repository 确保有 @Mapper

@Mapper
public class CategoryMapper {

    
}

不要忘记将它添加到 SpringApplication runner class。这个 class 是在您第一次创建项目文件时生成的

@Bean
    public ModelMapper modelMapper() {
        return new ModelMapper();
    }

//For repsitory dont forget this.
//This will be added upper of the class in springapplication class runner

@MappedTypes({YourEntity.class})
@MapperScan("package patch to you repository")

Answer 2

这是接口代码@SpicySandwich

`@Mapper(componentModel = "spring") 公共接口 SubredditMapper {

@Mapping(target = "numberOfPosts", expression = "java(mapPosts(subreddit.getPosts()))")
SubredditDto mapSubredditToDto(Subreddit subreddit);

default Integer mapPosts(List<Post> numberOfPosts) {
    return numberOfPosts.size();
}

@InheritInverseConfiguration
@Mapping(target = "posts", ignore = true)
Subreddit mapDtoToSubreddit(SubredditDto subredditDto);

}`