spring mvc vALIDATION NOT WORKING WITH ME code example
Example: mvc 5 required field validation not working
//1. Get JQuery validation scripts via NuGet
//PM> install-package Microsot.JQuery.Unobtrusive.Validation
//2. Add .js reference to master page (_Layout.cshtml)
<script src="/Scripts/jquery.validate.js"></script>
<script src="/Scripts/jquery.validate.unobtrusive.js"></script>