依赖注释：{@ org.springframework.beans.factory.annotation.Autowired（required = true）}

时间：2018-01-16 11:44:53

标签： spring-boot

错误：

2018-01-16 20:06:12.431  INFO 22672 --- [           main] c.n.NucLibraryBackstageApplication       : Starting NucLibraryBackstageApplication on DESKTOP-SCA7LS6 with PID 22672 (H:\NUCLibraryBackstage\target\classes started by hp in H:\NUCLibraryBackstage)
2018-01-16 20:06:12.433  INFO 22672 --- [           main] c.n.NucLibraryBackstageApplication       : The following profiles are active: dev
2018-01-16 20:06:12.469  INFO 22672 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@e056f20: startup date [Tue Jan 16 20:06:12 GMT+08:00 2018]; root of context hierarchy
2018-01-16 20:06:13.551  INFO 22672 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$ef473d70] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2018-01-16 20:06:13.940  INFO 22672 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2018-01-16 20:06:13.951  INFO 22672 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2018-01-16 20:06:13.952  INFO 22672 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.23
2018-01-16 20:06:14.032  INFO 22672 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2018-01-16 20:06:14.032  INFO 22672 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1566 ms
2018-01-16 20:06:14.166  INFO 22672 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: 'dispatcherServlet' to [/]
2018-01-16 20:06:14.182  INFO 22672 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-01-16 20:06:14.182  INFO 22672 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-01-16 20:06:14.182  INFO 22672 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-01-16 20:06:14.182  INFO 22672 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
2018-01-16 20:06:14.219  WARN 22672 --- [           main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'administratorController': Unsatisfied dependency expressed through field 'administratorRepository'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.nuclibrarybackstage.repository.AdministratorRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
2018-01-16 20:06:14.219  INFO 22672 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
2018-01-16 20:06:14.235  INFO 22672 --- [           main] utoConfigurationReportLoggingInitializer : 

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2018-01-16 20:06:14.304 ERROR 22672 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

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

Description:

Field administratorRepository in com.nuclibrarybackstage.controller.AdministratorController required a bean of type 'com.nuclibrarybackstage.repository.AdministratorRepository' that could not be found.


Action:

Consider defining a bean of type 'com.nuclibrarybackstage.repository.AdministratorRepository' in your configuration.


Process finished with exit code 1

在代码仍然可以运行之前，添加一些DataSourceConfig配置和pom.xml，就会出现上述情况。

现在无法启动。 Project structure

更新： 我刚刚重建了一个项目，发现我将DataSourceConfig.class加入，然后运行错误的程序。我不知道错误发生的确切位置。

的pom.xml 这是maven的配置文件。

 <dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>

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

    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>

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

    <!--Generate api automatically-->
    <dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-swagger2</artifactId>
        <version>2.6.1</version>
    </dependency>
    <dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-swagger-ui</artifactId>
        <version>2.6.1</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.restdocs</groupId>
        <artifactId>spring-restdocs-mockmvc</artifactId>
        <version>1.1.2.RELEASE</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-staticdocs</artifactId>
        <version>2.6.1</version>
    </dependency>
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.8</version>
    </dependency>
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>1.1.6</version>
    </dependency>

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>4.1.4.Final</version>
    </dependency>

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>4.1.4.Final</version>
    </dependency>

DataSourceConfig 这是我稍后添加的数据配置。

@Configuration
@EnableJpaRepositories
@EnableTransactionManagement
//@ComponentScan("com.nuclibrarybackstage.repository")
public class DataSourceConfig {



   @Bean
    public DataSource dataSource() {

        EmbeddedDatabaseBuilder builder = new EmbeddedDatabaseBuilder();
        return builder.setType(EmbeddedDatabaseType.HSQL).build();
    }

    @Bean
    public EntityManagerFactory entityManagerFactory() {

        HibernateJpaVendorAdapter vendorAdapter = new 
    HibernateJpaVendorAdapter();
        vendorAdapter.setGenerateDdl(true);

        LocalContainerEntityManagerFactoryBean factory = new 
    LocalContainerEntityManagerFactoryBean();
        factory.setJpaVendorAdapter(vendorAdapter);
        factory.setPackagesToScan("com.nuclibrarybackstage.domain");
        factory.setDataSource(dataSource());
        factory.afterPropertiesSet();

        return factory.getObject();
    }

    @Bean
    public PlatformTransactionManager transactionManager() {

        JpaTransactionManager txManager = new JpaTransactionManager();
        txManager.setEntityManagerFactory(entityManagerFactory());
        return txManager;
    }
}

AdministratorController 这是一个控制类。

    @RestController
    public class AdministratorController {


        @Autowired
        private AdministratorRepository administratorRepository;

        @PostMapping(value = "/administrator")
        public Result<Administrator> administratorAdd(@Valid Administrator 
      administrator ,BindingResult bindingResult){
            if (bindingResult.hasErrors()){
                return 



 ResultUtli.error(1,bindingResult.getFieldError().getDefaultMessage());
            }
            return 
  ResultUtli.success(administratorRepository.save(administrator));
  }

AdministratorRepository 

@Component
@ConfigurationProperties(prefix = "administrator")
public interface AdministratorRepository extends 
JpaRepository<Administrator,Integer>{
}

6 个答案:

答案 0 :(得分：0)

您的 AdministratorRepository 可以在Springboot未扫描的包中定义。

而是尝试手动定义它：

  @Repository
  @ComponentScan(basePackages = "com.nucli.etc.repository)
//@Component
  @ConfigurationProperties(prefix = "administrator")
  public interface AdministratorRepository extends 
  JpaRepository<Administrator,Integer>{
    }

答案 1 :(得分：0)

如果存储库管理的实体未使用@Entity注释，则会发生此错误。

请确保您的Administrator课程已使用此注释进行注释。

答案 2 :(得分：0)

删除pom.xml＆＃39;代码：

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
    <version>4.1.4.Final</version>
</dependency>
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
    <version>5.2.3.Final</version>
</dependency>

答案 3 :(得分：0)

尝试在服务实现类上使用@Service。它对我有用。

在多层应用程序中，我们将具有不同的层，例如表示，服务，业务，数据访问等。当要对类进行注解以供Spring自动检测时，则应使用以下相应的构造型。

@Component –通用，可以在整个应用程序中使用。

@Service –在服务层级别注释类。

@Controller –在表示层级别注释类，主要在Spring MVC中使用。

@Repository –在持久层注释类，它将充当数据库存储库。

了解更多信息：https://javapapers.com/spring/spring-component-service-repository-controller-difference/

答案 4 :(得分：0)

我遇到了同样的问题，我确实在Main类中手动指定了要扫描的软件包。它解决了我的问题。

@SpringBootApplication
@ComponentScan(basePackages = "com.nuclibrarybackstage.repository")
public class Application {}

答案 5 :(得分：0)

添加此依赖项

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