This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Requirement is not clear...but my understanding is that
1)You have a form in jsp page
2)You submit it
3)Generate the bar code
4)Show it in browser in previous jsp page
If that is it...
You could have a check in jsp like...