This week's book giveaway is in the General Computing forum. We're giving away four copies of Arduino in Action and have Martin Evans, Joshua Noble, and Jordan Hochenbaum on-line! See this thread for details.
http://struts.apache.org/2.x/docs/textfield.html has the list of parameters for a textfield tag. requiredposition might be what you are looking for. The documentation says it will "Define required position of required form element (left|right)" but I have no idea if that means where the text elemnt is on the page or where the text is inside the text box.