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.
For some reason (I forget) you need to use a JSP to forward to your action. So, create some welcome.jsp (which is your index file in your web.xml), which simply does a <jsp:forward page="/welcome.do"/>.