Marco Tedone wrote:
Well, as far as I can see, a part from the validation bit, the use would be
pretty much the same:
with action forms, to retrieve values, I'd have to invoke a getter method on
the action form, while with straight HTML I'd invoke the get on the request.
The downside, as far as I can see, is that I'd have to declare a new class
for any new form. Are there any other advantages from using ActionForms?
Marco
----- Original Message -----
From: "Amleto Di Salle" <[EMAIL PROTECTED]>
To: "'Struts Users Mailing List'" <[EMAIL PROTECTED]>
Sent: Tuesday, September 07, 2004 3:09 PM
Subject: R: A couple of questions
Hi,
the ActionForm are used for the input form of your application.
If you use the ActionForm in your Action you don't have to use the
HttpServletRequest.getParameter("ID") method in order to obtain the
value of the parameter "ID", for example.
Furthermore, using ActionForm with package Validator you can validate
your forms in the client and server side.
What's new in Struts 1.2.2
http://struts.apache.org/userGuide/release-notes.html
But the 1.2.2 has some problems. So in your case you can use the Struts
1.1
There are many. First, when you use an ActionForm you can mine the
values of request parameters from multiple requests. So, while you seem
to be doing the same thing with [ActionForm].getParameter() as with
request.getParameter("parameter") you definitely are NOT. You are in
fact abstracting the request.getParameter("parameter") method call so
that you don't have to keep repeating it, i.e. you get rid of
unnecessary, repetitive, coding. Second, if there are validations
issues, as you have seen, they are also abstracted. Third, you get a
whole panoply of tags which are tied to the ActionForm and allow
simplified work with page design. There is no limit to how you can
extend this. My company, for example, uses this to provide completely
automatic generation of submit and image tags making the cost of tag
designers essentially a moot issue by extending the submit and image
html tags connected to the form. Fourth, you get to set the form on the
page in relation to your model with an ease that is a bit surprising.
This is a poplular framework because it definitely is a good design.
Craig did one hell of a job on this.
Michael
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