........
  public  ActionForward execute (ActionMapping mapping,
            ActionForm form, HttpServletRequest request,
            HttpServletResponse response)  throws  IOException {
        
        .................
        /* ===========================================*/
        ActionMessages errors =  new  ActionMessages( );

        ActionMessage message =  new  ActionMessage(
                "msg", "A jorney in the dark...");
        errors.add(ActionMessages.GLOBAL_MESSAGE, message);
        
        saveMessages( request, errors);

        /* ===========================================*/
        .................
         return  mapping.findForward("view");
    }

..................................
<logic:messagesPresent>
<table border="1" bgcolor="orange" width="100%" align="center">
    <tr><td>   
        <ul>
            <html:messages id="error">
                <li><bean:write name="error"/></li>
            </html:messages>
        </ul>
    </td></tr>
</table>
<p>
</logic:messagesPresent>
..................................

     public  ActionMessages valudate(ActionMapping mapping, HttpServletRequest request){
        ActionMessages errors =  new  ActionMessages();
        errors.add("error",  new  ActionMessage("Validation problem"));
         return  errors;
    }