springboot @ComponentScan注解原理解析

@SpringBootApplication
@ComponentScan({"com.demo"})
public class Application {
  private static final Logger LOG = LoggerFactory.getLogger(Application.class);

  public static void main(String[] args) {
    SpringApplication app = new SpringApplication(Application.class);
    app.setBannerMode(Banner.Mode.OFF);
    app.setWebEnvironment(true);
    app.run(args);
    LOG.info("**************** Startup Success ****************");
  }
}