This demonstrates how to use Vaadin Springboot, Gradle build tool, and Vaadin Spreadsheet add-on
The following command starts tomcat embedded server, the result is then browseable by navigating to http://localhost:8080
gradle vaadinRun
Note that license key is needed to enable Vaadin Spreadsheet add-on. Request a free trail license, download the license key and place it at your home directory (\Users\username).