Java基础的简单的小项目——吃货联盟系统

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Java基础的简单的小项目——吃货联盟系统

  public static void main(String[] args) {//初始化数据// 数据主体：一组订单信息String[] names = new String[4];//订餐人姓名String[] dishMegs = new String[4];//所选菜品int[] times = new int[4];//送餐时间String[] addresses = new String[4];//送餐地址int[] states = new int[4];//订单状态：0 已预购   1 已完成double[] sumPrices = new double[4];//订单总金额// 初始化两个订单names[0] = "小樱花  ";dishMegs[0] = "红烧带鱼  2份";times[0] = 19;addresses[0] = "高天原";sumPrices[0] = 76.0;states[0] = 1;names[1] = "绘梨衣";dishMegs[1] = "红烧带鱼  1份";times[1] = 18;addresses[1] = "爱媛县";sumPrices[1] = 10;//可供选择的菜品String[] dishNames = {"红烧带鱼", "鱼香肉丝", "时令蔬菜"};//菜品单价double[] prices = new double[]{38.0, 20.0, 10};int[] praiseNums = new int[3];Scanner input = new Scanner(System.in);//用户输入0返回主菜单，否则退出系统int num = -1;//标记用户是否退出系统，true：退出系统boolean isExit = false;System.out.println("\n欢迎使用吃货联盟系统");//循环，显示菜单，根据用户选择，执行功能do {//显示菜单System.out.println("*******************************");System.out.println("1：我要订餐");System.out.println("2：查看餐袋");System.out.println("3：签收订单");System.out.println("4：删除订单");System.out.println("5：我要点赞");System.out.println("6：退出系统");System.out.println("*******************************");System.out.println("请选择：");//记录客户选择int choose = input.nextInt();//找到要签收的订单boolean isSignFind = false;//找到要删除的订单boolean isDelFind = false;//根据用户选择的功能编号，执行响应switch (choose) {case 1://我要订餐System.out.println("**********我要订餐**********");boolean isAdd = false;//循环展示菜单for (int j = 0; j < names.length; j++) {//找到第一个空位置，可以添加订单信息if (names[j] == null) {//标记位置，可以订餐isAdd = true;System.out.println("请输入订餐人姓名：");String name = input.next();//显示供选择的菜品信息System.out.println("序号" + "\t" + "菜名" + "\t" + "单价");for (int i = 0; i < dishNames.length; i++) {String price = prices[i] + "元";String priaiseNum = (praiseNums[i]) > 0 ? praiseNums[i] + "赞" : "";System.out.println((i + 1) + "\t" + dishNames[i] + "\t" + price + "\t" + priaiseNum);}//用户点菜System.out.println("请选择你要点的菜：");int chooseDish = input.nextInt();System.out.println("请选择你点的份数：");int number = input.nextInt();String dishMeg = dishNames[chooseDish - 1] + "" + number + "份";double sumPrice = prices[chooseDish - 1] * number;//餐费满50元，免送餐费5元double deliCharge = (sumPrice >= 50) ? 0 : 5;System.out.println("请输入送餐时间(送餐时间是10点至20点间整点送餐:)");int time = input.nextInt();while (time < 10 || time > 20) {System.out.println("你输入有误,请输入10~20间的整数!");time = input.nextInt();}System.out.println("请输入送餐地址:");String address = input.next();//无需添加状态,默认是0,即已预订状态.System.out.println("订餐成功!");System.out.println("你订的是:" + dishMeg);System.out.println("送餐时间是:" + time + "点");System.out.println("餐费:" + sumPrice + "元,送餐费" + deliCharge + "元,总计:" + (sumPrice + deliCharge) + "元");//添加数据names[j] = name;dishMegs[j] = dishMeg;times[j] = time;addresses[j] = address;sumPrices[j] = sumPrice + deliCharge;break;}}if (!isAdd) {System.out.println("对不起,你的餐袋已满!");}break;case 2://查看餐袋System.out.println("**********查看餐袋**********");System.out.println("序号\t订餐人\t餐品信息\t送餐时间\t总金额\t订单");for (int i = 0; i < names.length; i++) {//查看餐袋中的内容，如果是空就跳出，不再查看if (names[i] != null) {String state = (states[i] == 0) ? "已预定" : "已完成";String data = times[i] + "点";String sumPrice = sumPrices[i] + "元";System.out.println((i + 1) + "\t" + names[i] + "\t" + dishMegs[i] + "\t" + times[i] + "\t" + sumPrice + "\t" + state);}}break;case 3://签收订单System.out.println("*********签收订单**********");System.out.println("请选择要签收的订单序号:");int signOrder = input.nextInt();for (int i = 0; i < names.length; i++) {//状态为已预定，序号为用户输入的订单序号：可签收//状态为已完成，序号为用户输入订单序号：不可签收if (names[i] != null && states[i] == 0 && signOrder == i + 1) {states[i] = 1;System.out.println("订单已完成签收");isSignFind = true;} else if (names[i] != null && states[i] == 1 && signOrder == i + 1) {System.out.println("你选择的订单已经签收，不能再次签收");isSignFind = true;}}//未找到的订单序号:不可签收if (!isSignFind) {System.out.println("您选择的订单不存在!");}break;case 4://删除订单System.out.println("*********删除订单**********");isDelFind = false;System.out.println("请输入要删除的订单序号:");int delId = input.nextInt();for (int i = 0; i < names.length; i++) {//状态值为已完成 序号值为用户输入的序号：可删除//状态值为已预定 序号值为用户输入的序号：不可删除if (names[i] != null && states[i] == 1 && delId == i + 1) {isDelFind = true;//执行删除操作：当前删除的位置，后面元素依次前移for (int j = delId - 1; j < names.length - 1; j++) {names[j] = names[j + 1];dishMegs[j] = dishMegs[j + 1];times[j] = times[j + 1];addresses[j] = addresses[j + 1];states[j] = states[j + 1];sumPrices[j] = sumPrices[j + 1];}//最后一位清空names[names.length - 1] = null;dishMegs[dishMegs.length - 1] = null;times[names.length - 1] = 0;addresses[names.length - 1] = null;states[names.length - 1] = 0;System.out.println("删除订单成功!");break;} else if (names[i] != null && states[i] == 0 && delId == i + 1) {System.out.println("您选择的订单未签收，不能删除!");isDelFind = true;break;}}//未找到该序号的订单，不能删除if (!isDelFind) {System.out.println("您要删除的订单不存在!");}break;case 5://我要点赞System.out.println("*********我要点赞**********");//显示菜品信息System.out.println("序号" + "\t" + "菜名" + "\t" + "单价");for (int i = 0; i < dishNames.length; i++) {String price = prices[i] + "元";String praiseNum = (praiseNums[i]) > 0 ? praiseNums[i] + "赞" : "";System.out.println((i + 1) + "\t" + dishNames[i] + "\t" + price + "\t" + praiseNum);}System.out.println("请选择您要点赞的菜品序号:");int praiseNum = input.nextInt();praiseNums[praiseNum - 1]++;   //点赞数+1System.out.println("点赞成功");break;case 6://退出系统isExit = true;break;default://退出系统isExit = true;break;}if (!isExit) {System.out.println("输入0返回");num = input.nextInt();} else {break;}} while (num == 0);System.out.println("感谢使用，欢迎下次光临");}

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