spring-boot/spring-boot-project/spring-boot-cli/samples/web.groovy

@Controller
class Example {

	@Autowired
	private MyService myService

	@RequestMapping("/")
	@ResponseBody
	public String helloWorld() {
		return myService.sayWorld()
	}

}

@Service
class MyService {

	public String sayWorld() {
		return "World!"
	}
}