forwarding to a servlett

[dilanka007]

Hello,

I am working on a simple login system.
When a user doesn't type anything on login and submit i want that request to go to a controller and hence the user hasn't passed any information that servlet should go on to the same jsp and generate an error msg.

how would i do that?
i am a bit lost in session objects..

thanks

[travishein]

you could do it with a request scope object too, such as if the servlet did a forward to the jsp, it could set an ERROR_MESSAGE request attribute, such as when the username / password fields from the jsp form was not entered or invalid. the JSP could have a block on it to try to read the ERROR_MESSAAGE request attribute, if i was present, print its contents out, in an appropriate spot such as above the form in the html templating.

[dilanka007]

heyy culd you please give me few fractions of the code about what you said..
well i am redirecting to a jsp here..

so what should i have in my servlet and on jsp//

f u can give me an example it will be great