Question

When I write out.println(), eclipse complains that out cannot be resolved.

I have imported java.io.* and other servlet packages.

Answer 1

Just a shot in the dark, I think this is the out you are looking for:

public class OutServlet extends HttpServlet {

    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        PrintWriter out = response.getWriter();
        out.println("foo");
    }
}