// first set up the PageContext and the bean
PageContext pc = createPageContext();
TestBean tb = new TestBean();
DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
ServletRequestDataBinder binder = new ServletRequestDataBinder(tb, "tb");
CustomDateEditor l = new CustomDateEditor(df, true);
binder.registerCustomEditor(Date.class, l);
pc.getRequest().setAttribute(BindingResult.MODEL_KEY_PREFIX + "tb", binder.getBindingResult());
// try another time, this time using Strings
BindTag bind = new BindTag();