DemoApplication.java

@SpringBootApplication
public class DemoApplication extends Application {

	private ConfigurableApplicationContext springContext;
	private Parent root;

	@Override
	public void init() throws Exception {
		springContext = SpringApplication.run(DemoApplication.class);
		FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("/sample.fxml"));
		fxmlLoader.setControllerFactory(springContext::getBean);
		root = fxmlLoader.load();
	}

	@Override
	public void start(Stage primaryStage) throws Exception{
		primaryStage.setTitle("Hello World");
		Scene scene = new Scene(root);

		primaryStage.setScene(scene);
		primaryStage.show();
	}

	@Override
	public void stop() throws Exception {
		springContext.stop();
	}


	public static void main(String[] args) {
		launch(DemoApplication.class, args);
	}
}