吃货联盟订餐系统

最新推荐文章于 2021-10-27 20:31:23 发布

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最新推荐文章于 2021-10-27 20:31:23 发布

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/xiao-ran/p/9816387.html

本文详细介绍了一个订餐系统的创建过程，包括买家类与订餐系统类的设计，实现了菜单导航、订餐、查看订单、签收、删除订单及点赞等功能。系统通过一系列方法如add()、display()、sign()等，提供了用户友好的交互界面。

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创建买家类，定义买家类的属性：

class OrderingSet {
    String[] names = new String[4];
    String[] dishMegs = new String[4];
    int[] times = new int[4];
    String[] address = new String[4];
    int[] states = new int[4];
    double[] sumPrices = new double[4];
}

创建订餐系统类：

　　属性：

String[] dishNames = { "红烧带鱼", "鱼香肉丝", "时令鲜蔬" };
double[] prices = new double[] { 38.0, 20.0, 10.0 };
int[] praiseNums = new int[3];
OrderingSet demo = new OrderingSet();

　　1.系统主菜单方法：（实现菜单间的切换）

public void startMenu() {
        boolean flag = true;
        int num = 1; 
        Scanner input = new Scanner(System.in);
        System.out.println("欢迎使用“吃货联盟订餐系统”");
        do {
            System.out.println("***************************\n");
            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("***************************\n");
            System.out.print("请选择：");
            int choose = input.nextInt();
            switch (choose) {    
            case 1:
                System.out.println("***我要订餐***");
                add();
                break;
            case 2:
                System.out.println("***查看餐袋***");
                display();
                break;
            case 3:
                System.out.println("***签收订单***");
                sign();
                break;
            case 4:
                System.out.println("***删除订单***");
                delete();
                break;
            case 5:
                System.out.println("***我要点赞***");
                praise();
                break;
            default:
                System.out.println("***退出系统***");
                flag = false;
                break;
            }
            if (flag) {
                System.out.println("请输入0返回");
                num = input.nextInt();
            } else {
                break;
            }
        } while (num == 0);
    }

　　2.创建我要订餐的方法：

public boolean add() {
        Scanner input = new Scanner(System.in);
        boolean isAdd = false;
        for (int i = 0; i < demo.names.length; i++) {
            if (demo.names[i] == null) {
                System.out.print("请输入订餐人姓名：");
                String name = input.next();
                System.out.println("序号\t菜名\t单价\t点赞数");
                for (int j = 0; j < dishNames.length; j++) {
                    String price = prices[j] + "元";
                    System.out.println((j + 1) + "\t" + dishNames[j] + "\t"
                            + price + "\t" + praiseNums[j]);
                }
                System.out.print("请选择你要点菜的编号：");
                int chooseDish = input.nextInt();
                System.out.print("请输入你要点赞的份数：");
                int number = input.nextInt();
                System.out.print("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 > 20 || time < 10) {
                    System.out.println("你输入有误，请输入10~20之间的整数");
                    time = input.nextInt();
                }
                System.out.print("请输入送餐地址：");
                String address = input.next();
                System.out.println("订餐成功！");
                String dishMeg = dishNames[chooseDish - 1] + "" + number + "份";
                double sumPrice = prices[chooseDish - 1] * number;
                double yunPrice = (sumPrice >= 50) ? 0 : 5;
                System.out.println("您订的是" + dishMeg);
                System.out.println("送餐时间：" + time + "点");
                System.out.println("餐费：" + sumPrice + "元，送餐费：" + yunPrice
                        + "元，总计：" + (sumPrice + yunPrice));
                demo.names[i] = name;
                demo.dishMegs[i] = dishMeg;
                demo.times[i] = time;
                demo.address[i] = address;
                demo.sumPrices[i] = sumPrice + yunPrice;
                isAdd = true;
                break;
            }
        }
        if (isAdd) {
            return true;
        } else {
            System.out.println("您的餐袋已满");
            return false;
        }
    }

　　3.创建查看餐袋的方法：

public void display() {
        System.out.println("序号\t订餐人\t餐品信息\t送餐时间\t送餐地址\t总金额\t订单状态");
        for (int i = 0; i < demo.names.length; i++) {
            if (demo.names[i] != null) {
                String state = (demo.states[i] == 0) ? "已预订" : "已完成";
                String time = demo.times[i] + "点";
                String sumPrice = demo.sumPrices[i] + "元";
                System.out.println((i + 1) + "\t" + demo.names[i] + "\t"
                        + demo.dishMegs[i] + "\t" + time + "\t"
                        + demo.address[i] + "\t" + sumPrice + "\t" + state);
            }
        }
    }

　　4.创建签收订单的方法：

    public void sign() {
        Scanner input = new Scanner(System.in);
        boolean a = true;
        System.out.print("请选择要签收的订单号：");
        int num = input.nextInt();
        for (int i = 0; i < demo.names.length; i++) {
            if (demo.names[i] != null && demo.states[i] == 0 && num == i + 1) {
                demo.states[i] = 1;
                System.out.println("订单签收成功！");
                a = false;
            } else if (demo.names[i] != null && demo.states[i] == 1
                    && num == i + 1) {
                System.out.println("此订单已经完成签收，不能再次签收！");
                a = false;
            }
        }
        if (a) {
            System.out.println("你选择的订单不存在！");
        }
    }

5.创建删除订单的方法：

public void delete() {
        Scanner input = new Scanner(System.in);
        boolean b = true;
        System.out.print("请输入要删除的订单号：");
        int delnum = input.nextInt();
        for (int i = 0; i < demo.names.length; i++) {
            if (demo.names[i] != null && demo.states[i] == 1 && delnum == i + 1) {
                for (int j = delnum - 1; j < demo.names.length; j++) {
                    demo.names[i] = demo.names[i + 1];
                    demo.dishMegs[i] = demo.dishMegs[i + 1];
                    demo.address[i] = demo.address[i + 1];
                    demo.states[i] = demo.states[i + 1];
                    demo.sumPrices[i] = demo.sumPrices[i + 1];
                    demo.times[i] = demo.times[i + 1];
                }
                demo.names[demo.names.length - 1] = null;
                demo.dishMegs[demo.names.length - 1] = null;
                demo.address[demo.names.length - 1] = null;
                demo.states[demo.names.length - 1] = 0;
                demo.sumPrices[demo.names.length - 1] = 0;
                demo.times[demo.names.length - 1] = 0;
                System.out.println("删除订单成功！");
                b = false;
                break;
            } else if (demo.names[i] != null && demo.states[i] == 0
                    && delnum == i + 1) {
                System.out.println("您的订单还未签收，不能删除！");
                b = false;
                break;
            }
        }
        if (b) {
            System.out.println("你要删除的订单不存在！");
        }
    }

　　6.创建我要点赞的方法：

public void praise() {
        Scanner input = new Scanner(System.in);
        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 number = (praiseNums[i] > 0) ? praiseNums[i] + "赞" : "";
            System.out.println((i + 1) + "\t" + dishNames[i] + "\t" + price
                    + "\t" +number);
        }
        System.out.print("请选择你要点赞的编号：");
        int chooseNum = input.nextInt();
        praiseNums[chooseNum - 1]++;
        System.out.println("点赞成功");
    }

测试：

    public static void main(String[] args) {
        Ordering begin = new Ordering();
        begin.startMenu();
    }
}

转载于:https://www.cnblogs.com/xiao-ran/p/9816387.html