📄 mainservlet.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 java.util.Vector;public class MainServlet extends HttpServlet { FlightSchedule flights; Vector depart_cities; Vector arrive_cities; public void init() { flights = new FlightSchedule(); depart_cities = flights.getDepartureCities(); arrive_cities = flights.getArrivalCities(); } /** * 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(); 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 make your selection</h1><br>"); out.println("<form action=\"DisplaySchedulesServlet\">"); out.println("<table>"); out.println("<tr><td>Departure:</td>"); out.println("<td><select name=\"depart\">"); for(int j = 0; j < depart_cities.size(); j++) { out.println("<option >"+depart_cities.elementAt(j) +"</option>"); } out.println("</select></td></tr>"); out.println("<tr><td>Arrival:</td>"); out.println("<td><select name=\"arrive\">"); for(int j = 0; j < arrive_cities.size(); j++) { out.println("<option >"+arrive_cities.elementAt(j) +"</option>"); } out.println("</select></td></tr>"); out.println("<tr><td>Flight date:</td>"); out.println("<td><select name=\"day\">"); for(int i=1; i<32; i++) out.println("<option value=\""+i+"\">"+i+"</option>"); out.println("</select>"); out.println("<select name=\"month\">"); for(int i=1; i<13; i++) out.println("<option value=\""+i+"\">"+i+"</option>"); out.println("</select>"); out.println("<select name=\"year\">"); for(int i=1; i<31; i++) out.println("<option value=\"2009\">2009</option>"); out.println("<option value=\"2010\">2010</option>"); out.println("<option value=\"2011\">2011</option>"); out.println("</select></td></tr>"); out.println("</table>"); out.println("<input type=\"Submit\" value=\"Search\">"); 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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