Validators allows you to validate wide variety of field values for email, IP address, URL, ISBN and credit card (AMEX, Diners, Discover, Master and VISA) using a simple Java class. Internally Validators uses Apache Commons Validator (<a href="http://commons.apache.org/proper/commons-validator/">http://commons.apache.org/proper/commons-validator/</a>).</div>

 

This technique was originally described in this blog: <a href="http://www.pipalia.co.uk/xpages-2/using-validator-property-to-keep-all-your-validations-in-a-single-java-class/" target="_blank">http://www.pipalia.co.uk/xpages-2/using-validator-property-to-keep-all-your-validations-in-a-single-java-class/</a>.</div>