modifybilldo.java

简单的餐厅管理系统

package controller.bill;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import java.util.Hashtable;
import java.util.Vector;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import util.DealOrder;

import beans.Bill;
import beans.Order;
import beans.User;

public class ModifyBillDo extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public ModifyBillDo() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {


		response.setContentType("text/html");
		request.setCharacterEncoding("GBK");
		
		HttpSession mySession = request.getSession();
		int type = 0;
		if(mySession.getAttribute("type")!= null){
			type = Integer.parseInt(mySession.getAttribute("type").toString());
		}
		if(type != 2){
			//跳转至主页面
			mySession.setAttribute("errorMsg", "只能服务员能够操作点菜单");
			RequestDispatcher rd = getServletContext().getRequestDispatcher("/main.jsp");
			rd.forward(request, response);
			return;
		}
		
		String action = request.getParameter("action");
		if(action == null){
			//没有给出主要信息，跳转至主页
			mySession.setAttribute("errorMsg", "错误操作");
			RequestDispatcher rd = getServletContext().getRequestDispatcher("/main.jsp");
			rd.forward(request, response);
			return;
		}else{
			if(action.equals("modifyOneBill")){
				doModifyOneBill(request,response);
				return;
			}
			if(action.equals("billOK")){
				doBillOk(request,response);
				return;
			}
			if(action.equals("checkout")){
				doCheckout(request,response);
				return;
			}
			if(action.equals("cancelBill")){
				doCancelBill(request,response);
				return;
			}
			if(action.equals("importOrder")){
				doImportOrder(request,response);
				return;
			}
			if(action.equals("importOrderOK")){
				doImportOrderOK(request,response);
				return;
			}
		}
		
		mySession.setAttribute("errorMsg", "错误操作");
		RequestDispatcher rd = getServletContext().getRequestDispatcher("/main.jsp");
		rd.forward(request, response);
	}

	
	private void doImportOrderOK(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		HttpSession mySession = request.getSession();
		String orderID = (String)request.getParameter("orderID");
		Bill add = new Bill();
		String errorMsg = add.importOrder(orderID);
		if(errorMsg == null){
			Hashtable billInfor = new Hashtable();
			billInfor.put("action", "modify");
			billInfor.put("bill", add);
			billInfor.put("orderID", orderID);
			
			mySession.setAttribute("billInfor", billInfor);
			RequestDispatcher rd = getServletContext().getRequestDispatcher("/waiter/bill/modifyBill.jsp");
			rd.forward(request, response);
			return;
		}else{
			
			mySession.setAttribute("errorMsg", errorMsg);
			RequestDispatcher rd = getServletContext().getRequestDispatcher("/waiter/bill/addBill.jsp");
			rd.forward(request, response);
			return;
		}
	}

	private void doImportOrder(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		HttpSession mySession = request.getSession();
		if(validateOperation("不能执行新的而订单修改",request,response)){
			DealOrder totalOrders = new DealOrder();
			
			String errorMsg = totalOrders.generateOrders();
			//设置request属性
			mySession.setAttribute("errorMsg", errorMsg);
			Vector temp = totalOrders.getOrders();
			request.setAttribute("allOrdersInfor", temp);
			 
			//跳转至显示所有的order的页面
			RequestDispatcher rd = getServletContext().getRequestDispatcher("/waiter/bill/showOrders.jsp");
			rd.forward(request, response);
			return;
		}
	}

	private void doCancelBill(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		HttpSession mySession = request.getSession();
		Hashtable billInfor = (Hashtable)mySession.getAttribute("billInfor");
		if(billInfor != null){
			billInfor.put("action", "ok");
		}
		mySession.setAttribute("billInfor", billInfor);
		mySession.setAttribute("errorMsg", "操作成功");
		RequestDispatcher rd = getServletContext().getRequestDispatcher("/main.jsp");
		rd.forward(request, response);
	}

	private void doCheckout(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		HttpSession mySession = request.getSession();
		Hashtable billInfor = (Hashtable)mySession.getAttribute("billInfor");
		if(billInfor != null){
			Bill bill = (Bill)billInfor.get("bill");
			if(bill != null){
				int tableNumber = 0,peopleNumber = 0;
				if(request.getParameter("tableNumber")!=null){
					tableNumber = Integer.parseInt(request.getParameter("tableNumber").toString());
				}
				if(request.getParameter("peopleNumber")!=null){
					peopleNumber = Integer.parseInt(request.getParameter("peopleNumber").toString());
				}
				bill.setNumberOfMan(peopleNumber);
				bill.setTableNum(tableNumber);
				bill.caculatePrice();
				bill.setEndTime(new Date());
				User waiter = new User();
				String username = (String)mySession.getAttribute("username");
				waiter.getWaiterData(username);
				bill.setWaiter(waiter);
				String billID = bill.getBillID();
				//执行添加操作
				String errorMsg = null;
				if(billID == null||billID.equals("")){
					errorMsg = bill.persist();
					errorMsg = bill.checkOut();
				}else{
					errorMsg = bill.checkOut();
				}
				if(errorMsg == null || errorMsg.equals("")){
					mySession.setAttribute("errorMsg", "成功修改");
				}else{
					//设置session
					mySession.setAttribute("errorMsg", errorMsg);
				}
				billInfor.put("action", "checked");
				mySession.setAttribute("billInfor", billInfor);
				
				//删除订单
				String orderID = (String)billInfor.get("orderID");
				if(orderID != null){
					Order delete = new Order();
					delete.setOrderID(orderID);
					delete.deleteOrder();
				}
				
				//执行完成开始跳转
				
				RequestDispatcher rd = getServletContext().getRequestDispatcher("/waiter/bill/billResult.jsp");
				rd.forward(request, response);
				return;
			}
		}
		
		//有错误跳转
		mySession.setAttribute("errorMsg", "有错误信息产生");
		RequestDispatcher rd = getServletContext().getRequestDispatcher("/waiter/bill/modifyBill.jsp");
		rd.forward(request, response);
	}

	private void doBillOk(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		HttpSession mySession = request.getSession();
		Hashtable billInfor = (Hashtable)mySession.getAttribute("billInfor");
		if(billInfor != null){
			Bill bill = (Bill)billInfor.get("bill");
			if(bill != null){
				int tableNumber = 0,peopleNumber = 0;
				if(request.getParameter("tableNumber")!=null){
					tableNumber = Integer.parseInt(request.getParameter("tableNumber").toString());
				}
				if(request.getParameter("peopleNumber")!=null){
					peopleNumber = Integer.parseInt(request.getParameter("peopleNumber").toString());
				}
				bill.setNumberOfMan(peopleNumber);
				bill.setTableNum(tableNumber);
				bill.caculatePrice();
				
				String billID = bill.getBillID();
				String username = (String)mySession.getAttribute("username");
				User waiter = new User();
				waiter.getWaiterData(username);
				bill.setWaiter(waiter);
				//执行添加操作
				String errorMsg = null;
				if(billID == null||billID.equals("")){
					errorMsg = bill.persist();
				}else{
					errorMsg = bill.update();
				}
				if(errorMsg == null || errorMsg.equals("")){
					mySession.setAttribute("errorMsg", "成功修改");
				}else{
					//设置session
					mySession.setAttribute("errorMsg", errorMsg);
				}
				billInfor.put("action", "ok");
				mySession.setAttribute("billInfor", billInfor);
				//执行完成开始跳转
				
				RequestDispatcher rd = getServletContext().getRequestDispatcher("/waiter/bill/billResult.jsp");
				rd.forward(request, response);
				return;
			}
		}
		
		//有错误跳转
		mySession.setAttribute("errorMsg", "有错误信息产生");
		RequestDispatcher rd = getServletContext().getRequestDispatcher("/waiter/bill/modifyBill.jsp");
		rd.forward(request, response);
		return;
	}

	private void doModifyOneBill(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		
		HttpSession mySession = request.getSession();
		Hashtable billInfor = (Hashtable)mySession.getAttribute("billInfor");
		if(validateOperation("不能执行新的而订单修改",request,response)){
			String billID = request.getParameter("billID");
			if(billID == null){
				mySession.setAttribute("errorMsg", "请输入正确的ID名");
				//跳转至主页面
				RequestDispatcher rd = getServletContext().getRequestDispatcher("/waiter/bill/modifyBillShow.jsp");
				rd.forward(request, response);
				return;
			}
			
			Bill temp = new Bill();
			
			String errorMsg = temp.getData(billID);
			mySession.setAttribute("errorMsg", errorMsg);
			if(errorMsg == null){
				int type = temp.getType();
				if(type == 2){
					mySession.setAttribute("errorMsg", "已经是账单，不能修改");
					billInfor = new Hashtable();
					billInfor.put("action", "checked");
					billInfor.put("bill", temp);
					mySession.setAttribute("billInfor", billInfor);
					RequestDispatcher rd = getServletContext().getRequestDispatcher("/waiter/bill/billResult.jsp");
					rd.forward(request, response);
					return;
				}
			}
			
			//设置billInfor
			billInfor = new Hashtable();
			billInfor.put("action", "modify");
			billInfor.put("bill", temp);
			mySession.setAttribute("billInfor", billInfor);
			
			
			//跳转至修改订单信息页面
			if(errorMsg == null){
				RequestDispatcher rd = getServletContext().getRequestDispatcher("/waiter/bill/modifyBill.jsp");
				rd.forward(request, response);
				return;
			}else{
				RequestDispatcher rd = getServletContext().getRequestDispatcher("/main.jsp");
				rd.forward(request, response);
				return;
			}
			
		}
	}

	//判断能不能执行操作
	private boolean validateOperation(String show,HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException{
		HttpSession mySession = request.getSession();
		Hashtable billInfor = (Hashtable)mySession.getAttribute("billInfor");
		if(billInfor != null){
			String action = (String)billInfor.get("action");
			if(action!=null){
				if(action.equals("modify")){
					mySession.setAttribute("errorMsg",show+", 请完成这个订单的填写");
					//跳转至修改订单的信息一栏
					RequestDispatcher rd = getServletContext().getRequestDispatcher("/waiter/bill/modifyBill.jsp");
					rd.forward(request, response);
					return false;
				}
				if(action.equals("delete")){
					mySession.setAttribute("errorMsg", show+"，请完成删除这个订单");
					//跳转至删除订单的信息一栏
					RequestDispatcher rd = getServletContext().getRequestDispatcher("/waiter/bill/deleteBill.jsp");
					rd.forward(request, response);
					return false;
				}
			}
		}
		return true;
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doGet(request,response);
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}