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How do I retrieve and display output from a processing page?

 
Kix Villalon
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Dear all,
I am a neophyte to Java and the IT world, and my school project involves a simple ordering catalog site. What I'm trying to do is generate an order number for a shopper that wants to purchase a product/products from my list. I have no more problems with order generations because I am reusing a bean that interacts with the database. My problem is, when I have saved an order to the database, retrieved the details through a processing page, I always get a NullPointerException upon invocation of the response.sendRedirect() method. This mechanism that I want to use is to display whatever details that I retrieved from my processing page to my add-to-cart page as an output. I can say that there is no problem with my bean because if I try to retrieve the current details from the DB and display it on the process page itself(which is not right because my processing page is supposed to be a background page only), it does work. I guess it's because of my sendRedirect() thing that leaks. Please helppp!
 
Michal Bienek
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The jsp page (processing or not) does not handle the response. You will always be referring to and modifying the HTTPRequest. You do not want to be performing a sendRedirect anyway, since everything from your request would be removed from the request.
What it seems you want to do is put your data into the request, and do a jsp:forward to your second page.
 
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