@Route("") public class MainView extends VerticalLayout { public MainView() { greetButton.addClickListener(event -> { String name = nameField.getValue(); }); add(nameField, greetButton); } } public class Application extends SpringBootServletInitializer { public static void main(String[] args) { SpringApplication.run(Application.class, args); } @Override protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) { return builder.sources(Application.class); } } yaml spring: vaadin: servlet: production-mode: false


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