google app engine开发实例

package com.jeffdouglas; import java.io.IOException; import javax.servlet.http.*; import java.util.Date; import java.util.List; import java.text.DateFormat; import javax.servlet.*; import javax.jdo.PersistenceManager; import com.jeffdouglas.entity.*; import com.google.appengine.api.datastore.Key; import com.google.appengine.api.datastore.KeyFactory; @SuppressWarnings("serial") public class TelesalesServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // create the persistence manager instance PersistenceManager pm = PMF.get().getPersistenceManager(); // display the lookup form if(request.getParameter("action").equals("accountLookup")) { // query for the entities by name String query = "select from " + Account.class.getName() + " where name == '"+request.getParameter("accountName")+"'"; List<Account> accounts = (List<Account>) pm.newQuery(query).execute(); // pass the list to the jsp request.setAttribute("accounts", accounts); // forward the request to the jsp RequestDispatcher dispatcher = getServletContext().getRequestDispatcher("/accountLookup.jsp"); dispatcher.forward(request, response); // display the create new account form } else if(request.getParameter("action").equals("accountCreate")) { response.sendRedirect("/accountCreate.jsp"); // process the new account creation and send them to the account display page } else if(request.getParameter("action").equals("accountCreateDo")) { // create the new account Account a = new Account( request.getParameter("name"), request.getParameter("billingCity"), request.getParameter("billingState"), request.getParameter("phone"), request.getParameter("website") ); // persist the entity try { pm.makePersistent(a); } finally { pm.close(); } response.sendRedirect("telesales?action=accountDisplay&accountId="+a.getId()); // display the account details and opportunities } else if(request.getParameter("action").equals("accountDisplay")) { // fetch the account Key k = KeyFactory.createKey(Account.class.getSimpleName(), new Integer(request.getParameter("accountId")).intValue()); Account a = pm.getObjectById(Account.class, k); // query for the opportunities String query = "select from " + Opportunity.class.getName() + " where accountId == "+request.getParameter("accountId"); List<Opportunity> opportunities = (List<Opportunity>) pm.newQuery(query).execute(); // pass the list to the jsp request.setAttribute("account", a); // pass the list to the jsp request.setAttribute("opportunities", opportunities); // forward the request to the jsp RequestDispatcher dispatcher = getServletContext().getRequestDispatcher("/accountDisplay.jsp"); dispatcher.forward(request, response); } else if(request.getParameter("action").equals("opportunityCreate")) { Key k = KeyFactory.createKey(Account.class.getSimpleName(), new Integer(request.getParameter("accountId")).intValue()); Account a = pm.getObjectById(Account.class, k); // pass the account name to the jsp request.setAttribute("accountName", a.getName()); // forward the request to the jsp RequestDispatcher dispatcher = getServletContext().getRequestDispatcher("/opportunityCreate.jsp"); dispatcher.forward(request, response); // process the new opportunity creation and send them to the account display page } else if(request.getParameter("action").equals("opportunityCreateDo")) { Date closeDate = new Date(); // try and parse the date try { DateFormat df = DateFormat.getDateInstance(3); closeDate = df.parse(request.getParameter("closeDate")); } catch(java.text.ParseException pe) { System.out.println("Exception " + pe); } // create the new opportunity Opportunity opp = new Opportunity( request.getParameter("name"), new Double(request.getParameter("amount")).doubleValue(), request.getParameter("stageName"), new Integer(request.getParameter("probability")).intValue(), closeDate, new Integer(request.getParameter("orderNumber")).intValue(), new Long(request.getParameter("accountId")) ); // persist the entity try { pm.makePersistent(opp); } finally { pm.close(); } response.sendRedirect("telesales?action=accountDisplay&accountId="+request.getParameter("accountId")); } else { Key k = KeyFactory.createKey(Account.class.getSimpleName(), new Integer(request.getParameter("accountId").trim()).intValue()); Account a = pm.getObjectById(Account.class, k); if(request.getParameter("action").equals("accountUpdate")) { //response.sendRedirect("/accountCreate.jsp"); System.out.println("dfhdsjfh"); // // fetch the account // Key k = KeyFactory.createKey(Account.class.getSimpleName(), new Integer(request.getParameter("accountId")).intValue()); // Account a = pm.getObjectById(Account.class, k); // // // query for the opportunities // String query = "select from " + Opportunity.class.getName() + " where accountId == "+request.getParameter("accountId"); // List<Opportunity> opportunities = (List<Opportunity>) pm.newQuery(query).execute(); // // // pass the list to the jsp // request.setAttribute("account", a); // // pass the list to the jsp // request.setAttribute("opportunities", opportunities); // // // forward the request to the jsp // RequestDispatcher dispatcher = getServletContext().getRequestDispatcher("/accountUpdate.jsp"); // dispatcher.forward(request, response); // String query = "select from " + Account.class.getName() + " where name == '"+request.getParameter("accountName")+"'"; // List<Account> accounts = (List<Account>) pm.newQuery(query).execute(); // Account b = (Account)accounts.get(0); System.out.println(request.getParameter("NewPhone")); System.out.println("get it"); try{ //Account c=pm.getObjectById(Account.class, request.getParameter("accountId").trim()); a.setPhone(request.getParameter("NewPhone")); } finally{ pm.close(); } } else if(request.getParameter("action").equals("accountDelete")) { //response.sendRedirect("/accountCreate.jsp"); System.out.println("delete"); // // fetch the account // Key k = KeyFactory.createKey(Account.class.getSimpleName(), new Integer(request.getParameter("accountId")).intValue()); // Account a = pm.getObjectById(Account.class, k); // // // query for the opportunities // String query = "select from " + Opportunity.class.getName() + " where accountId == "+request.getParameter("accountId"); // List<Opportunity> opportunities = (List<Opportunity>) pm.newQuery(query).execute(); // // // pass the list to the jsp // request.setAttribute("account", a); // // pass the list to the jsp // request.setAttribute("opportunities", opportunities); // // // forward the request to the jsp // RequestDispatcher dispatcher = getServletContext().getRequestDispatcher("/accountUpdate.jsp"); // dispatcher.forward(request, response); // String query = "select from " + Account.class.getName() + " where name == '"+request.getParameter("accountName")+"'"; // List<Account> accounts = (List<Account>) pm.newQuery(query).execute(); // Account b = (Account)accounts.get(0); //Key k = KeyFactory.createKey(Account.class.getSimpleName(), new Integer(request.getParameter("accountId").trim()).intValue()); //Account b = pm.getObjectById(Account.class, k); //try{ //Account c=pm.getOb