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Almost ... people can turn off Javascript in their
browsers.
If you want to perform error checking on the client-side using
Javascript, it still doesn't mean you don't have to fully handle the errors in
the servlet/Java code.
Client/Server : Validate in the client and the
server
3-tier: Validate in the client, the middle-tier and in the
database
A common case is, Javascript -> Java -> (PL/SQL,
TransactSQL, etc).
It will be nice when 1 language can really be used in all
tiers. (When I say really: I don't mean downloading a huge JAR to client
on the other end of a 28.8 modem; nor database vendors that support Java,
almost).
Thor HW
----- Original Message -----
Sent: Sunday, August 08, 1999 9:13
PM
Subject: Re: Strange Question
Hi Andras,
Another solution to this kind of a problem where the user does not fill in
all the fields when he is suppossed to is to validate it at the form level
itself before sending the request to the servlet. You can use Javascript
or something like that to do this. So this will remove all the unwnated
validations from the servlet side and make your code clearer.
Hope this helps
Nitin
Balogh Andras wrote:
Hi, I have a strange
question. How hard is to the server to handle Exceptions ?To be more precise
here is an example:I have a form with 3 fields:name,telephone,address.I
retrieve the parameters in the servlet with the usuallymethod
req.getParameterValues("name")[0].Now if the servlet is called from the
right form that everything is OK.But if someone removes the 'name' field
from the form my servlet throws aNullPointerException wich is a normal
behavior.So my question is: this exception will be a SHOCK to the server(or
the JVM) or it will terminate the servlet as nothing were happen?Or another
question: Too many exceptions will produce anabnormal behavior of the
server(JVM) after a time ??I am asking this question becuase if the answer
is NO (meening that Exceptions don't affect at allthe server or JVM) that i
will drop the extra if conditions
like:if(req.getParameterValues("name")!=null)
name=req.getParameterValues("name")[0]. Waiting for Your answers. Thank
you,
Andras
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