theOrder.setBeef(sBeef.equals ( "on" ) ? true : false);
theOrder.setMushrooms(sMushrooms.equals ( "on" ) ? true : false);
theOrder.setSausage(sSausage.equals ( "on" ) ? true : false);

*****************************************************************

<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
  <set-property 
    property="pathnames" 
    value="/WEB-INF/validator-rules.xml,/WEB-INF/validation.xml"/>
</plug-in>