diff --git a/ticketing-master/src/com/cn/servlet/UpdateTrainServlet.java b/ticketing-master/src/com/cn/servlet/UpdateTrainServlet.java index 12bf5c4..3aec552 100644 --- a/ticketing-master/src/com/cn/servlet/UpdateTrainServlet.java +++ b/ticketing-master/src/com/cn/servlet/UpdateTrainServlet.java @@ -15,82 +15,100 @@ import com.cn.service.impl.TrainServiceImpl; /** * * @ClassName: UpdateTrainServlet - * @Description: 管理员 修改车次信息 + * @Description: 管理员修改车次信息的Servlet * @author: ljy * @date: 2019年11月10日 下午11:49:16 */ public class UpdateTrainServlet extends HttpServlet { - private static final long serialVersionUID = 1L; - + private static final long serialVersionUID = 1L; - protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { - /** - * 将需要修改的车次信息输出到界面 - */ - Integer trainId = Integer.valueOf(request.getParameter("trainId")); - TrainService trainService = new TrainServiceImpl(); - Train train = trainService.getById(trainId); - //开车时间与到站时间格式转换为"yyyy-MM-ddThh:mm"，不然jsp界面无法显示出默认时间 - String startTime = train.getStartTime(); - startTime = startTime.substring(0, 10)+"T"+startTime.substring(11, 16); - train.setStartTime(startTime); - String endTime = train.getEndTime(); - endTime = endTime.substring(0, 10)+"T"+endTime.substring(11, 16); - train.setEndTime(endTime); - - request.setAttribute("train", train); - request.getRequestDispatcher("pages/admin/right/updateTrain.jsp").forward(request, response); - } + /** + * 处理GET请求的方法。 + * 当客户端发送GET请求到此Servlet时，这个方法会被调用。 + * @param request HttpServletRequest对象，包含客户端请求信息。 + * @param response HttpServletResponse对象，用于发送响应到客户端。 + * @throws ServletException 可能抛出的Servlet异常。 + * @throws IOException 可能抛出的IO异常。 + */ + protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { + /** + * 将需要修改的车次信息输出到界面 + */ + // 从请求中获取车次ID参数，并转换为Integer类型 + Integer trainId = Integer.valueOf(request.getParameter("trainId")); + // 创建TrainService的实现类对象，用于访问车次相关的业务逻辑 + TrainService trainService = new TrainServiceImpl(); + // 根据车次ID获取车次对象 + Train train = trainService.getById(trainId); + // 开车时间与到站时间格式转换为"yyyy-MM-ddThh:mm"，以符合JSP界面的显示要求 + String startTime = train.getStartTime(); + startTime = startTime.substring(0, 10)+"T"+startTime.substring(11, 16); + train.setStartTime(startTime); + String endTime = train.getEndTime(); + endTime = endTime.substring(0, 10)+"T"+endTime.substring(11, 16); + train.setEndTime(endTime); + + // 将车次对象设置为request属性，以便在JSP页面中可以访问 + request.setAttribute("train", train); + // 转发请求到修改车次信息的JSP页面 + request.getRequestDispatcher("pages/admin/right/updateTrain.jsp").forward(request, response); + } - /** - * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) - */ - protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { - /** - * 将修改后的车次信息保存到数据库，然后跳转到GetAllTrainServlet界面 - */ - - - //获取界面中输入的数据 - Integer trainId = Integer.valueOf(request.getParameter("trainId")); - String trainNumber = request.getParameter("trainNumber"); - String startStation = request.getParameter("startStation"); - String endStation = request.getParameter("endStation"); - String startTime = request.getParameter("startTime"); - startTime = startTime.substring(0, 10)+" "+startTime.substring(11)+":00"; - String endTime = request.getParameter("endTime"); - endTime = endTime.substring(0, 10)+" "+endTime.substring(11)+":00"; - Integer price = Integer.valueOf(request.getParameter("price")); - Integer seatNumber = Integer.valueOf(request.getParameter("seatNumber")); - - //从数据库中取出该车次信息，进行修改 - TrainService trainService = new TrainServiceImpl(); - Train train = trainService.getById(trainId); - - train.setTrainNumber(trainNumber); - train.setStartStation(startStation); - train.setEndStation(endStation); - train.setStartTime(startTime); - train.setEndTime(endTime); - train.setPrice(price); - train.setSeatNumber(seatNumber); - - //将数据存入数据库,并返回是否成功的结果 - int recordNumber = trainService.update(train); - - - //根据返回值判断是否添加车次成功，返回1为成功 - PrintWriter out = response.getWriter(); - if(recordNumber == 1) { - out.write(""); - }else { - out.write(""); - } - - out.close(); - - } + /** + * 处理POST请求的方法。 + * 当客户端发送POST请求到此Servlet时，这个方法会被调用。 + * @param request HttpServletRequest对象，包含客户端请求信息。 + * @param response HttpServletResponse对象，用于发送响应到客户端。 + * @throws ServletException 可能抛出的Servlet异常。 + * @throws IOException 可能抛出的IO异常。 + */ + protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { + /** + * 将修改后的车次信息保存到数据库，然后跳转到GetAllTrainServlet界面 + */ + + // 获取界面中输入的数据 + Integer trainId = Integer.valueOf(request.getParameter("trainId")); + String trainNumber = request.getParameter("trainNumber"); + String startStation = request.getParameter("startStation"); + String endStation = request.getParameter("endStation"); + String startTime = request.getParameter("startTime"); + startTime = startTime.substring(0, 10)+" "+startTime.substring(11)+":00"; + String endTime = request.getParameter("endTime"); + endTime = endTime.substring(0, 10)+" "+endTime.substring(11)+":00"; + Integer price = Integer.valueOf(request.getParameter("price")); + Integer seatNumber = Integer.valueOf(request.getParameter("seatNumber")); + + // 从数据库中取出该车次信息，进行修改 + TrainService trainService = new TrainServiceImpl(); + Train train = trainService.getById(trainId); + + train.setTrainNumber(trainNumber); + train.setStartStation(startStation); + train.setEndStation(endStation); + train.setStartTime(startTime); + train.setEndTime(endTime); + train.setPrice(price); + train.setSeatNumber(seatNumber); + + // 将数据存入数据库，并返回是否成功的结果 + int recordNumber = trainService.update(train); + + + // 根据返回值判断是否添加车次成功，返回1为成功 + PrintWriter out = response.getWriter(); + if(recordNumber == 1) { + // 如果成功，弹出提示并跳转到所有车次的Servlet + out.write(""); + } else { + // 如果失败，弹出提示并跳转到所有车次的Servlet + out.write(""); + } + + // 关闭PrintWriter对象 + out.close(); + } -} +} \ No newline at end of file