字段XXX需要找不到类型为XXX的bean

Question

我在Spring Boot中有一个错误

moduleContraller

@RestController

@RequestMapping("/module")

@Validated

public class ModuleController {

    private Logger log = LoggerFactory.getLogger(this.getClass());

    private final ModuleService moduleService;

    private final ResultGenerator generator;

    @Autowired

    public ModuleController(ModuleService moduleService, ResultGenerator generator) {

        this.moduleService = moduleService;

        this.generator = generator;

    }

    @PostMapping("/add")

    public RestResult addModule(@Valid Module module){

        return generator.getSuccessResult("添加模块成功", moduleService.saveModule(module));

    }

    @GetMapping("/all")

    public RestResult getModule(){

        return generator.getSuccessResult("查找成功", moduleService.getModule());

    }

    @GetMapping("/{id}")

    public RestResult getModuleByMID(@PathVariable("id") Integer MID){

        return generator.getSuccessResult("查找成功", moduleService.getModuleByMID(MID));

    }

    @PutMapping("/edit/{id}")

    public RestResult editModule(@PathVariable("id") Integer MID, String title, String description){

        return generator.getSuccessResult("修改成功", moduleService.editModule(MID, title, description));

    }

    @DeleteMapping("/remove/{id}")

    public void removeModule(@PathVariable("id")Integer MID) {

        moduleService.removeModuleByID(MID);

    }

}

模块存储库

package org.tyrik.toys.repository;

import org.springframework.data.jpa.repository.JpaRepository;

import org.springframework.stereotype.Repository;

import org.tyrik.toys.entity.Module;

@Repository

public interface ModuleRepository extends JpaRepository<Module, Integer> {

}

还有这里的ModuleService

/**

 * 模块接口

 */

public interface ModuleService {

    Module saveModule(Module module);

    List<Module> getModule();

    Optional<Module> getModuleByMID(Integer MID);

    Module editModule(Integer MID, String title, String description);

    void removeModuleByID(Integer MID);

}

现在我睡不着。这个问题困扰了我整整一整天，希望你们能帮助我解决这个问题。

Answer 1

删除“ ModuleServiceImpl ”豆名ModuleServiceImpl。由于您只有ModuleService接口的一种实现，因此这里不需要限定它。@Servicepublic class ModuleServiceImpl implements ModuleService{如果仍然要使用Bean名称，请尝试使用@Qualifier@Autowiredpublic ModuleController(@Qualifier(ModuleServiceImpl) ModuleService moduleService, ResultGenerator generator)&nbsp;{&nbsp; &nbsp; this.moduleService = moduleService;&nbsp; &nbsp; this.generator = generator;}