我得到以下错误:

***************************
APPLICATION FAILED TO START
***************************

Description:

Parameter 0 of method setApplicant in webService.controller.RequestController required a bean of type 'com.service.applicant.Applicant' that could not be found.


Action:

Consider defining a bean of type 'com.service.applicant.Applicant' in your configuration.

我以前从未见过这个错误,但奇怪的是@Autowire不工作。项目结构如下:

申请人接口

public interface Applicant {

    TApplicant findBySSN(String ssn) throws ServletException;

    void deleteByssn(String ssn) throws ServletException;

    void createApplicant(TApplicant tApplicant) throws ServletException;

    void updateApplicant(TApplicant tApplicant) throws ServletException;

    List<TApplicant> getAllApplicants() throws ServletException;
}

ApplicantImpl

@Service
@Transactional
public class ApplicantImpl implements Applicant {

private static Log log = LogFactory.getLog(ApplicantImpl.class);

    private TApplicantRepository applicantRepo;

@Override
    public List<TApplicant> getAllApplicants() throws ServletException {

        List<TApplicant> applicantList = applicantRepo.findAll();

        return applicantList;
    }
}

现在我应该能够自动连线申请人,并能够访问,但在这种情况下,当我在@RestController中调用它时,它是不工作的:

@RestController
public class RequestController extends LoggingAware {

    private Applicant applicant;

    @Autowired
    public void setApplicant(Applicant applicant){
        this.applicant = applicant;
    }

    @RequestMapping(value="/", method = RequestMethod.GET)
    public String helloWorld() {

        try {
            List<TApplicant> applicantList = applicant.getAllApplicants();

            for (TApplicant tApplicant : applicantList){
                System.out.println("Name: "+tApplicant.getIndivName()+" SSN "+tApplicant.getIndSsn());
            }

            return "home";
        }
        catch (ServletException e) {
            e.printStackTrace();
        }

        return "error";
    }

}

------------------------ 更新1 -----------------------

我添加了

@SpringBootApplication
@ComponentScan("module-service")
public class WebServiceApplication extends SpringBootServletInitializer {

    @Override protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        return builder.sources(WebServiceApplication.class);
    }

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

}

错误消失了,但什么也没发生。然而,当我在添加@ComponentScan()之前注释掉所有与RestController中的申请人相关的内容时,我能够返回一个字符串的UI,从而意味着我的RestController正在工作,现在它被跳过了。我丑陋的白色标签错误页现在。

--------------------- 更新2 ------------------------------

我添加了它所抱怨的bean的基本包。错误读取:

***************************
APPLICATION FAILED TO START
***************************

Description:

Parameter 0 of method setApplicantRepo in com.service.applicant.ApplicantImpl required a bean of type 'com.delivery.service.request.repository.TApplicantRepository' that could not be found.


Action:

Consider defining a bean of type 'com.delivery.request.request.repository.TApplicantRepository' in your configuration.

我添加了@ComponentScan

@SpringBootApplication
@ComponentScan({"com.delivery.service","com.delivery.request"})
public class WebServiceApplication extends SpringBootServletInitializer {

    @Override protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        return builder.sources(WebServiceApplication.class);
    }

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

}

---------------------------- 更新3 ----------------------

添加:

@SpringBootApplication
@ComponentScan("com")
public class WebServiceApplication extends SpringBootServletInitializer {

仍然在抱怨我的ApplicantImpl类@自动连接我的repo TApplicantRepository到它。


当前回答

我遇到了类似的问题,完全相同的错误信息。 但我的错误只发生在我试图安装和运行在我的本地docker。

事实证明,这个问题取决于个人特征。

我有两个实现接口的类,其中一个具有生产Profile @Profile(“prod”) 第二个是“测试环境”概要文件。 @Profile(”!本地& !prod”)

然而,当我试图在本地(在Docker上)运行时,没有活动配置文件。

我创建了一个第三类,实现了一个本地配置文件@Profile(“本地”)的接口,这解决了我的问题

其他回答

我有同样的问题,我得到这个错误的redis库像这样:

@Repository
public interface AppTokenRepository extends CrudRepository<AppToken, String> {
}


@RedisHash("APP_TOKEN")
public class AppToken implements Serializable {
    private String id;
    private String accessToken;
}

我通过在spring引导应用程序类上添加@EnableRedisRepositories解决了我的问题。

对于没有找到Bean的类使用@Component。 和使用

@ComponentScan(“< Use_The_Root_Directory_Of_Main_Class >”)

. 当组件分布在许多目录中时,就会发生这种情况。

@Configuration
@SpringBootApplication
@ComponentScan({"com.example.demo"})
public class Application {
}

尝试如下所示配置项目结构:

把所有的repo, service,包放在主包的子包中:

package com.leisure.moviemax;  //Parent package
        
@SpringBootApplication
@PropertySource(value={"classpath:conf.properties"})
    
public class MoviemaxApplication implements CommandLineRunner {
        
package com.leisure.moviemax.repo; //child package

@Repository
public interface UsrRepository extends JpaRepository<UserEntity,String> {

我在网上寻找答案,但似乎没有一个合适的解决方案: 在一开始,一切都很顺利:

@Slf4j
@Service
@AllArgsConstructor(onConstructor = @__(@Autowired))
public class GroupService {
    private Repository repository;
    private Service service;
}

然后我试图添加一个映射来缓存一些东西,它变成了这样:

@Slf4j
@Service
@AllArgsConstructor(onConstructor = @__(@Autowired))
public class GroupService {
    private Repository repository;
    private Service service;
    Map<String, String> testMap;
}

繁荣!

Description:

Parameter 4 of constructor in *.GroupService required a bean of type 'java.lang.String' that could not be found.


Action:

Consider defining a bean of type 'java.lang.String' in your configuration.

我删除了@AllArgsConstructor(onConstructor = @__(@Autowired)),并为每个存储库和服务添加@Autowired,除了Map<String, String>。就像以前一样。

@Slf4j
@Service
public class SecurityGroupService {
    @Autowired
    private Repository repository;
    @Autowired
    private Service service;
    Map<String, String> testMap;
}

希望这对你有所帮助。

对我来说-使用Spring Boot与MongoDB,以下是问题:

在我的POM.xml我有:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-starter-data-mongodb</artifactId>
</dependency>

但我需要以下信息:

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-mongodb</artifactId>
    </dependency>

(短:增加“spring-boot-…”而不是“spring-…”)