dishcontroller.java

简单的餐厅管理系统

package controller;

import java.io.IOException;
import java.io.PrintWriter;
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.DealAllDishSort;
import util.DealDish;
import util.DealMaterial;

import beans.Dish;
import beans.Material;

public class DishController extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public DishController() {
		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();
		String action = (String)request.getParameter("action");
		int type = 0;
		if(mySession.getAttribute("type")!= null){
			type = Integer.parseInt(mySession.getAttribute("type").toString());
		}
		if(action == null){
			action = "";
		}
		if(action.equals("query")){
			if(type == 1){
				doQueryDish(request,response);
				response.sendRedirect("../admin/highQuery.jsp");
			}else{
				doLowQueryDish(request,response);
				RequestDispatcher rd = getServletContext().getRequestDispatcher("/lowQuery.jsp");
				rd.forward(request, response);
				return;
			}
			return;
		}
		if(type == 1 || type == 2){
			if(type == 1&& action.equals("addDish")){
				doAddDish(request,response);
				return;
			}
			if(type == 1&& action.equals("modifyDish")){
				doModifyDish(request,response);
				return;
			}
			if(type == 1&& action.equals("deleteDish")){
				doDeleteDish(request,response);
				return;
			}
			if(type == 1&& action.equals("addMaterial")){
				doAddMaterial(request,response);
				return;
			}
			if(type == 1&&action.equals("modifyMaterial")){
				doModifyMaterial(request,response);
				return;
			}
			if(type == 1&&action.equals("materialOK")){
				doMaterialOK(request,response);
				return;
			}
			if(type == 1&&action.equals("delete")){
				doDeleteDish(request,response);
				return;
			}
			if(type == 1&&action.equals("ok")){
				doOkDish(request,response);
				return;
			}
			if(type == 1&&action.equals("cancelModifyDish")){
				doCancelModifyDish(request,response);
				return;
			}
			if(type == 1&&action.equals("modifyDishOK")){
				doModifyDishOK(request,response);
				return;
			}
			if(type == 1&&action.equals("deleteDishOK")){
				doDeleteDishOK(request,response);
				return;
			}
		}
		
		mySession.setAttribute("errorMsg", "信息错误,重新登陆");
		response.sendRedirect("../main.jsp");
	}

	
	
	
	
	
	
	
	

	
	private void doLowQueryDish(HttpServletRequest request,
			HttpServletResponse response) {
		// TODO Auto-generated method stub
		String dishSort = request.getParameter("dishSorts");
		DealDish temp = new DealDish();
		if(dishSort == null){
			dishSort ="all";
		}
		String mains = request.getParameter("mains");
		if(mains == null){
			mains = "all";
		}
		if(dishSort.equals("all")&&mains.equals("all")){
			String errorMsg = temp.getDishes();
		}else if(dishSort.equals("all")&&(!mains.equals("all"))){
			String errorMsg = temp.getDisherByMain(mains);
		}else if((!dishSort.equals("all"))&&mains.equals("all")){
			String errorMsg = temp.getDishesBySort(dishSort);
		}else{
			String errorMsg = temp.getDishes(dishSort, mains);
		}
		Vector dishes = new Vector();
		int i = 0;
		while(temp.isIn(i)){
			dishes.add(temp.getDish(i));
			i++;
		}
		
		Hashtable dishsInfor;
		
		//生成showType 数组
			dishsInfor = new Hashtable();
			Vector showType = new Vector();	
			DealAllDishSort dealSort = new DealAllDishSort();
			dealSort.generateDish();
			showType = dealSort.getDishesSort();
			Vector materialsName = new Vector();
			DealMaterial ma = new DealMaterial();
			String errorMsg = ma.getMaterial();
			i = 0;
			while(ma.hasMore(i)){
				materialsName.add(ma.getMaterial(i).getName());
				i++;
			}
			dishsInfor.put("showType", showType);
			dishsInfor.put("materialsName", materialsName);
	
		dishsInfor.put("dishes", dishes);
		request.setAttribute("dishesInfor", dishsInfor);
	}

	private void doQueryDish(HttpServletRequest request,
			HttpServletResponse response) {
		// TODO Auto-generated method stub
		//生成dishes数组
		String dishSort = request.getParameter("dishSorts");
		DealDish temp = new DealDish();
		if(dishSort == null){
			dishSort ="all";
		}
		String mains = request.getParameter("mains");
		if(mains == null){
			mains = "all";
		}
		if(dishSort.equals("all")&&mains.equals("all")){
			String errorMsg = temp.getDishes();
		}else if(dishSort.equals("all")&&(!mains.equals("all"))){
			String errorMsg = temp.getDisherByMain(mains);
		}else if((!dishSort.equals("all"))&&mains.equals("all")){
			String errorMsg = temp.getDishesBySort(dishSort);
		}else{
			String errorMsg = temp.getDishes(dishSort, mains);
		}
		Vector dishes = new Vector();
		int i = 0;
		while(temp.isIn(i)){
			dishes.add(temp.getDish(i));
			i++;
		}
		
		HttpSession mySession = request.getSession();
		Hashtable dishsInfor;
		
		//生成showType 数组
			dishsInfor = new Hashtable();
			Vector showType = new Vector();	
			DealAllDishSort dealSort = new DealAllDishSort();
			dealSort.generateDish();
			showType = dealSort.getDishesSort();
			Vector materialsName = new Vector();
			DealMaterial ma = new DealMaterial();
			String errorMsg = ma.getMaterial();
			i = 0;
			while(ma.hasMore(i)){
				materialsName.add(ma.getMaterial(i).getName());
				i++;
			}
			dishsInfor.put("showType", showType);
			dishsInfor.put("materialsName", materialsName);
	
		dishsInfor.put("dishes", dishes);
		mySession.setAttribute("dishesInfor", dishsInfor);
	}
	//编写成功但未测试
	private void doDeleteDishOK(HttpServletRequest request,
			HttpServletResponse response) throws IOException {
		// TODO Auto-generated method stub
		HttpSession mySession = request.getSession();
		Hashtable dishInfor = (Hashtable)mySession.getAttribute("dishInfor");
		if(dishInfor !=null){
			String action = (String)dishInfor.get("action");
			if(action != null && action.equals(("modify"))){
				mySession.setAttribute("errorMsg", "不能修改新菜。请完成修改这个菜");
				response.sendRedirect("../admin/showDishInfor.jsp");
				return;
			}
		}
		
		dishInfor = new Hashtable();
		String dishID = request.getParameter("dishID");
		if(dishID == null){
			mySession.setAttribute("errorMsg", "没有给出正确的菜的ID");
			response.sendRedirect("../admin/caipu.jsp");
			return;
		}
		Dish temp = new Dish();
		temp.getDetailInfo(dishID);
		String errorMsg = temp.deleteDish();
		if(errorMsg == null||errorMsg.equals("")){
			mySession.setAttribute("errorMsg", "删除成功");
			dishInfor.put("action", "delete");
			dishInfor.put("dish", temp);
			mySession.setAttribute("dishInfor", dishInfor);
			response.sendRedirect("../admin/showDishInfor.jsp");
		}else{
			mySession.setAttribute("errorMsg", errorMsg);
			response.sendRedirect("../admin/deleteDish.jsp");
		}
			
	}

	//编写成功
	//但未测试
	private void doModifyDishOK(HttpServletRequest request,
			HttpServletResponse response) throws IOException {
		// TODO Auto-generated method stub
		HttpSession mySession = request.getSession();
		Hashtable dishInfor = (Hashtable)mySession.getAttribute("dishInfor");
		if(dishInfor !=null){
			String action = (String)dishInfor.get("action");
			if(action != null && action.equals(("modify"))){
				mySession.setAttribute("errorMsg", "不能添加新菜。请完成修改这个菜");
				response.sendRedirect("../admin/showDishInfor.jsp");
				return;
			}
		}
		
		dishInfor = new Hashtable();
		String dishID = request.getParameter("dishID");
		if(dishID == null){
			mySession.setAttribute("errorMsg", "没有给出正确的菜的ID");
			response.sendRedirect("../admin/caipu.jsp");
			return;
		}
		Dish temp = new Dish();
		String errorMsg = temp.getDetailInfo(dishID);
		mySession.setAttribute("errorMsg", errorMsg);
		if(errorMsg != null){
			response.sendRedirect("../admin/modifyDish.jsp");
			return;
		}
		dishInfor.put("action", "modify");
		dishInfor.put("dish", temp);
		mySession.setAttribute("dishInfor", dishInfor);
		response.sendRedirect("../admin/showDishInfor.jsp");	
	}

	//当点击添加菜的功能是执行这个方法
	//相当完善
	private void doAddDish(HttpServletRequest request,
			HttpServletResponse response) throws IOException {
		// TODO Auto-generated method stub
		HttpSession mySession = request.getSession();
		Hashtable dishInfor = (Hashtable)mySession.getAttribute("dishInfor");
		if(dishInfor == null){
			dishInfor = new Hashtable();
			dishInfor.put("action", "new");
			mySession.setAttribute("dishInfor", dishInfor);
			mySession.setAttribute("errorMsg","");
			response.sendRedirect("../admin/showDishInfor.jsp");
			return;
		}else{
			String action = (String)dishInfor.get("action");
			if(action!=null){
				if(action.equals("modify")){
					mySession.setAttribute("errorMsg", "不能添加新菜。请完成修改这个菜");
					response.sendRedirect("../admin/showDishInfor.jsp");
					return;
				}else{
					dishInfor.put("action", "new");
					mySession.setAttribute("dishInfor", dishInfor);
					mySession.setAttribute("errorMsg","");
					response.sendRedirect("../admin/showDishInfor.jsp");
					return;
				}
			}else{
				dishInfor.put("action", "new");
				mySession.setAttribute("dishInfor", dishInfor);
				mySession.setAttribute("errorMsg","");
				response.sendRedirect("../admin/showDishInfor.jsp");
				return;