Web User Interface for a Java application

Question

I\'m trying to create a web user interface for a Java application. The user interface is going to be very simple, consisting of a single page with a form for users to pose t

Answer 1

EDIT: So far, I've decided on the following:

• Web Application Server: Jetty;
• Java Server Pages for the views;
• Based on the suggestions of @djna, I've read a couple of articles regarding Model 2, and I came up with this solution (which I haven't tested yet, because I need to finish my application before moving into the interface):

form.jsp

<form action="/servlet/EngineServlet" method="GET">
  <input type="text" name="text" />
</form>

EngineServlet.java

public class EngineServlet extends HttpServlet {
  private Engine engine = new Engine(); 
  // does this make sure engine only gets instantiated one time in the entire lifespan of the web application; from what I've read from the servlet lifecycle, it seems like it, but I'd like to hear opinions

  public void doGet(HttpServletRequest request,
                    HttpServletResponse response) {
    String text = request.getParameter("text");
    ResultBean result = engine.run(text);
    request.setAttribute("result", result);
    RequestDispatcher dispatcher = request.getRequestDispatcher("result.jsp");
    dispatcher.forward(request, response); 
    // what's the difference between forward, and request.sendRedirect() ?
  }    
}

result.jsp

<div>The result was: ${result.text}</div>

What do you think of this solution? Any problems that may not be obvious to someone coming from a J2SE background ? I also wrote some doubts that I have in the code as comments. Thanks.