package hall; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; public class HelloUser extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); String user = request.getParameter("User"); String greeting = "Hello "; if (user != null) greeting = greeting + user; out.println(ServletUtilities.headWithTitle(greeting) + "

" + greeting + "

"); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } }