in struts2, in jsp file, i didn't use <s:actionerror />
however, it is possible to display actionerror messages.
how it is possible?
is this tag not required?
Validation is usually server-side unless specifically configured to be client side. Server-side validation creates field errors that are handled by the Struts field tags. That's why you don't need the actionerror tag. Client-side validation is performed with JavaScript.