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.
Using request.setAttribute ensures that the userList object is stored in request scope (i.e. will be visible in the JSP for example that the action forwards to). I would recommend using the source forge "display tag" to render the list on the jsp (http://displaytag.sourceforge.net/11/). this will automatically paginate your data, you can customise its look and feel also. it's very easy to use
you should never really be displaying excessive information on a jsp anyways, give the user a search facility to narrow it down or use display tag.