hello friends i need to invoke a jsp page from a servlet..........
the need is that user enters data into a form on a jsp page.a servlet is called by the form submit.....
In the servlet the data is to be verified and if it has errors it should display a Success Page or error Page.........if thrs a error page the errors should be seen on that jsp Page

Well typical for a web application :)
What you can do is if you have errors in the form data recieved, create a list of error messages [for each validation error for example] and set this list as request attribute and FORWARD to the error page/to the same page where user has entered the data. On this page get the request attribute, if it is not null then loop through the list and display error message.
Remember you need to forward to the jsp not redirect!

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- Rakesh
http://iam-rakesh.blogspot.com