da-report
 |src
  |main
   |java
    com.abc.da.app
      service/
        ComService
      AppConfig
      ComApp
  |resources
build.gradle

Field service in com.abc.da.app.service.ComApp required a bean of type 'com.abc.da.app.service.ComService' that could not be found.

Action:

Consider defining a bean of type 'com.abc.da.app.service.ComService' in your configuration.

....
@Service
class ComService [
}

...
object ComApp extends App {
 val cxt = new SpringApplicationBuilder().sources(classOf[ComApp])).run(args: _*)
 println("contain service class? " + cxt.getBean(""))
}

@SpringBootApplication
@Import(Array=(classOf[AppConfig]))
@EnableAutoConfiguration()
class ComApp {
  @Autowired var service: ComService = _
}

....
@Configuration
@ComponentScan(basePackages = Array("com.abc.da.app.service"))
class AppConfig {
}