The closer your test or demo data is to the real world the better you can test the application for UX, improve, and catch corner cases during development. In this article, I'll show you how to use Vaadin's example data generator to create demo data for a simple SQL database. The article shows how to build a complete app combining Spring Boot, JPA, Project Lombok, Vaadin, and MariaDB.
You can also watch a video version of this article: