Spring 资源组装器抛出 NoSuchBeanDefinitionException

Question

我在 spring 启动应用程序中使用 spring-hateoas 的 ResourceAssemblerSupport

我创建了如下的汇编程序：

public class MemberResourceAssembler extends ResourceAssemblerSupport<Member, MemberResource>{

    public MemberResourceAssembler(Class<?> controllerClass, Class<MemberResource> resourceType) {
        super(controllerClass, resourceType);
    }
    @Override
    public MemberResource toResource(Member member) {
        MemberResource memberResource=new MemberResource();
        memberResource.setStatus(member.getStatus());
        memberResource.setHeight(member.getHeight());
        memberResource.setIs_veg(member.getIs_veg());
        memberResource.setRace(member.getRace());
        memberResource.setWeight(member.getWeight());
        return memberResource;
    }

}

资源 class 如下：

public class MemberResource extends ResourceSupport implements Serializable{
//relevant code here
}

域名class如下：

@Document(collection="Member")
public class Member {
//relevant code here
}

仓库class如下：

public interface MemberRepository extends PagingAndSortingRepository<Member,Integer> {

    Page<Member> findByStatusContainsIgnoreCase(@Param("q") String status, Pageable pageable);
}

现在我正尝试在我的控制器中使用如下：

@RestController
@RequestMapping("/members")
public class MemberController {
     @Autowired
    private MemberRepository memberRepository;

     @Autowired
    private MemberResourceAssembler assembler;

    @RequestMapping(value = "/search", method = RequestMethod.GET)
    public PagedResources<MemberResource> search(@RequestParam("status") String status, @PageableDefault Pageable pageable,
            PagedResourcesAssembler<Member> pagedAssembler) {
         Page<Member> members = memberRepository.findByStatusContainsIgnoreCase(status, pageable);
         return pagedAssembler.toResource(members, assembler);   
    }

}

我遇到以下异常：

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.sg.resources.MemberResourceAssembler] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

使用 spring-hateoas 版本 0.19.0.RELEASE.All 依赖项来自 Spring Boot 1.3.0.RELEASE

Controller 的父包中有一个 spring 引导应用程序 class class.The 存储库上的 Autowire 注释工作正常。

Answer 1

您的 MemberResourceAssembler 应注释为 @Component 以使其可用于自动装配。

Answer 2

我在 Application.class 中添加了一个 bean 定义，解决了这个问题

    @SpringBootApplication
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

    @Bean
    public MemberResourceAssembler memberResourceAssembler() {
        return new MemberResourceAssembler(MemberController.class, MemberResource.class);
    }
}

Spring 资源组装器抛出 NoSuchBeanDefinitionException

Spring Resource Assembler throwing NoSuchBeanDefinitionException

spring

spring-mvc

spring-hateoas