servlets: how to notify of failed validation

[dave]

Here's what i want to do in most efficient way possible.

I have 1> an html form that asks for an integer. 2> If not an integer, I
want to create, like in a lot of commercial websites, a refresh of that same
page with red letters saying "Sorry this number is not an integer please try
again". Instead of creating like 3 servlets, how do i do this with one?

 

[Bryce]

Here's what i want to do in most efficient way possible.

I have 1> an html form that asks for an integer. 2> If not an integer, I
want to create, like in a lot of commercial websites, a refresh of that same
page with red letters saying "Sorry this number is not an integer please try
again". Instead of creating like 3 servlets, how do i do this with one?

JSP

Have JSP look for ErrorList or something in session.

If not there, don't do anything.

If there, make red letters.

In servlet, if not integer, create ErrorList, put in session, redirect
back to JSP.

or... Use Struts, which has most of this built in.