<action-mappings>
        <action path="/filterReportsByDate" type="com.common.actions.FilterReportsByDateAction"
                name="filterReportsForm"
                input="common.reports.tile"
                validate="true"
                scope="request">
            <forward name="success" path="common.reports.tile"/>
        </action>
    </action-mappings>

 package  com.bubsw.olympic.common.forms;

 import  org.apache.struts.action.ActionErrors;
 import  org.apache.struts.action.ActionForm;
 import  org.apache.struts.action.ActionMapping;
 import  org.apache.struts.action.ActionMessage;

 import  javax.servlet.ServletRequest;
 import  java.text.ParseException;
 import  java.text.SimpleDateFormat;
 import  java.util.Date;

/**
 * User: USER
 * Copyright: BIGCOMPANY (c) 2007
 * Version: 1.0
 * Date: 14.05.2007
 * Time: 11:58:00
 */
 public   class  FilterReportsForm  extends  ActionForm{
   ...
     public  ActionErrors validate(ActionMapping actionMapping, ServletRequest servletRequest){
        SimpleDateFormat sdf =  new  SimpleDateFormat("yyyy/MM/dd");
        ActionErrors errors =  new  ActionErrors();
         try {
            fromdate = sdf.parse(fromdate_str);
            todate = sdf.parse(todate_str);
        }  catch (ParseException e){
            errors.add("errors.date",  new  ActionMessage("errors.date", "\'from\' or \'to\'"));
        }
         return  errors;
    }
}