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.
You should ensure that the url of your page maps to the servlet. For example if your url is <your_context>/somepage, you should map the path 'somepage' to the servlet that you wish to execute and process the request. The mapping is defined in web.xml. The same's true for jsps too.