title: Back-end validations using commons validator with Spring
body: <p>I am new to Spring and Apache commons Validator, and I need to validate a POJO of user details like address and other general details.</p>
  
  <p>I have tried searching the same on Google but I am getting confused with UI and Back-End validations which are described in those.</p>
  
  <p>Can any one please help me knowing the same or getting some good reference from where I can read and implement the same?</p>
  
  <p>Also please note I need to create this functionality as an OSGI bundle and deploy on Apache Karaf, so in case you are helping me with this please keep this thing in mind.</p>