title: Struts list validation
body: <p>I have a struts2 select </p>
  
  <pre><code>&lt;s:select list="country" listKey="referenceId" listValue="referenceDesc" 
    headerKey="0" headerValue="Select an option" 
    name="selectedCountry[%{#status.index}]"/&gt;. 
  </code></pre>
  
  <p>Now I can see three drop-downlist which is dynamically generated for three users, my question is how to validate for each person that country is selected in validation.xml. I heard about visitor validator which I feel complex for this scenario, Can some one let me know how to get this make working.</p>