title: File uploaded in postgres db
body: <p>I'm new of vaadin and I'm developing my first application with spring and vaadin.</p>
  
  <p>Now I'm trying to save an image inside my database. I followed the description of upload component on vaadin-book (<a href="https://vaadin.com/book/-/page/components.upload.html" rel="nofollow">Upload Component</a>)</p>
  
  <p>What do I have to change if I want to store it in the database? 
  Can you give me an example?</p>