得到“没有定义合格的 bean 类型。”

Question

我遇到异常 -

org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.muztaba.service.VerdictServiceImpl] is defined
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:372)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:332)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1066)
at com.muztaba.service.App.task(App.java:35)
at com.muztaba.service.App.main(App.java:28)

这是我得到异常的班级。

@Component
public class App {

QueueService<Submission> queue;

Compiler compiler;

VerdictService verdictService;

public static void main( String[] args ) {
    new App().task();
}

private void task() {
    AbstractApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class);
    queue =  context.getBean(QueueImpl.class);
    compiler = context.getBean(CompilerImpl.class);
    verdictService = context.getBean(VerdictServiceImpl.class); //here the exception thrown. 

    while (true) {
        if (!queue.isEmpty()) {
            Submission submission = queue.get();
            compiler.submit(submission);
        }
    }
}
}

前两个变量已正确注入，但 verdictService 未正确注入。这是我的接口VerdictService和VerdictServiceImpl类。

public interface VerdictService {
    void post(Verdict verdict);
}

==

@Service
@Transactional
public class VerdictServiceImpl implements VerdictService {

  @Autowired
  SessionFactory sessionFactory;

  @Override
  public void post(Verdict verdict) {
      sessionFactory.getCurrentSession()
              .save(verdict);
}
}

这是我的配置类

@Configuration
@EnableScheduling
@ComponentScan(basePackages = "com.muztaba")
public class AppConfig {

}

我还给出了我的项目目录结构。

我在这里缺少什么？谢谢。

Answer 1

你需要自动装配VerdictService

@Autowired
VerdictService verdictService;

并且你需要省略该行

verdictService = context.getBean(VerdictServiceImpl.class);

理想情况下，您的代码应该通过自动装配使用这些服务。