📄 clientdataservlet.java
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package airtickets;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;public class ClientDataServlet extends HttpServlet { /** * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods. * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); HttpSession session = request.getSession(true); String flight_code = request.getParameter("group1"); String req = (String)request.getParameter("quantity"); int quantity; try { quantity = Integer.parseInt(req); } catch(NumberFormatException nfe) { out.println("<html>"); out.println("<head>"); out.println("<title>AA Airways - Ticket Reservation System</title>"); out.println("</head>"); out.println("<body>"); out.println("Error in quantity! Please provide a numeric value"); out.println("</body>"); out.println("</html>"); out.close(); return; } session.setAttribute("quantity", quantity); session.setAttribute("flight_code", flight_code); try { out.println("<html>"); out.println("<head>"); out.println("<title>AA Airways - Ticket Reservation System</title>"); out.println("</head>"); out.println("<body>"); out.println("<h1>Please provide the passengers' data:</h1>"); out.println("<form action=\"PrintoutServlet\">"); for(int j=0; j<quantity; j++) { out.println("<table>"); out.println("<tr><td>Name: </td><td><input type = \"text\" name = \"name" + j + "\"></td></tr>"); out.println("<tr><td>Surname: </td><td><input type = \"text\" name = \"surname" + j + "\"></td></tr>"); out.println("</table>"); out.println("<br><br>"); } out.println("<input type=\"submit\" value=\"Finalise Reservation\">"); out.println("</form>"); out.println("</body>"); out.println("</html>"); } finally { out.close(); } } // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code."> /** * Handles the HTTP <code>GET</code> method. * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } /** * Handles the HTTP <code>POST</code> method. * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } /** * Returns a short description of the servlet. * @return a String containing servlet description */ @Override public String getServletInfo() { return "Short description"; }// </editor-fold>}⌨️ 快捷键说明
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