【0706】综合作业：吃货联盟订餐系统

package com.workprojects;

/**
 * 吃货联盟订餐系统
 * 2019-07-07
 * @author L
 */
import java.util.Scanner;

public class Eatsystem {
    static Scanner sc = new Scanner(System.in);

    public static void main(String[] args) {
        // 保存信息
        String[] names = new String[4];// 订餐人姓名
        int[] foodNums = new int[4];// 保存份数
        int[] ids = new int[4];// 订单序号
        int[] times = new int[4];// 送餐时间,整点送餐
        String[] addresses = new String[4];// 送餐地址
        int[] states = new int[4];// 订单状态,0表示已预订（默认状态），1表示已完成
        double[] sumPrices = new double[4];// 订单总金额
        int[] goodNums = new int[3];// 点赞
        int[] foodIds = new int[3];// 菜品序号

        // 菜品信息
        String[] foodNames = { "红烧带鱼", "鱼香肉丝", "时令鲜蔬" };// 菜品名称
        double foodPrices[] = { 38.0, 20.0, 10.0 };// 菜品单价

        // 初始化第一笔订单
        ids[0] = 1;// 序号“1”
        names[0] = "张晴";
        foodNames[0] = "红烧带鱼";
        foodNums[0] = 2;
        times[0] = 12;
        addresses[0] = "天成路207号";
        sumPrices[0] = 76.0;
        states[0] = 1;

        // 初始化第二笔订单
        ids[1] = 2;
        names[1] = "张晴";
        foodNames[1] = "鱼香肉丝";
        foodNums[1] = 2;
        times[1] = 18;
        addresses[1] = "天成路207号";
        sumPrices[1] = 45.0;
        states[1] = 0;

        // 订餐系统
        int num = -1;// 用户输入0返回主菜单，否则退出系统
        boolean flag = false;// 标志用户是否退出系统，为true时退出系统。
        System.out.println("欢迎使用“吃货联盟订餐系统”");// 订餐系统欢迎引导
        do {// 先执行初始菜单目录，并循环展示
            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("***********************");

            // 选择菜单
            System.out.print("请选择：");
            int choose = sc.nextInt();// 功能编号

            switch (choose) {
            case 1:
                // 订餐
                System.out.println("***我要订餐***");
                boolean addFood = false;// 判断是否可以订餐
                for (int j = 0; j < names.length; j++) {
                    if (names[j] == null) {// 获取订餐人为空的位置
                        addFood = true;// 为空则可订餐
                        System.out.print("请输入订餐人姓名：");
                        String name = sc.next();
                        ids[j]=j+1;
                        // 展示餐品信息，价格，点赞等相关信息
                        System.out.println("序号" + "	" + "菜名" + "	" + "单价" + "	" + "点赞数");// 菜品详情
                        for (int i = 0; i < foodNames.length; i++) {
                            String goodNum = (goodNums[i]) > 0 ? goodNums[i] + "赞" : "0";
                            System.out.println((i + 1) + "	" + foodNames[i] + "	" + foodPrices[i] + "	" + goodNum);
                        }
                        // 点餐
                        System.out.print("请选择您要点的菜品编号：");
                        int foodId = sc.nextInt();// 餐品序号
                        String foodName = foodNames[foodId - 1];
                        System.out.print("请选择您需要的份数：");
                        int foodNum = sc.nextInt();// 订餐餐品份数
                        double sumPrice = foodPrices[foodId - 1] * foodNum;// 该订单金额
                        double fare = (sumPrice >= 50) ? 0 : 5;// 订单总额大于等于50免配送费，低于50需要5元配送费
                        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 = sc.nextInt();
                        while (time < 10 || time > 20) {
                            System.out.print("您输入有误，请输入10~20间的整数：");
                            time = sc.nextInt();
                        }
                        System.out.print("请输入送餐地址：");
                        String address = sc.next();

                        // 下单成功提示！
                        System.out.println("订餐成功！");
                        System.out.println("您订的是：" + foodName + "	" + foodNum + "份");
                        System.out.println("送餐时间：" + time + "点");
                        System.out.println("送餐地址：" + address + "，收货人：" + name);
                        System.out.println("餐费：" + sumPrice + "元，送餐费：" + fare + "元，总计：" + (sumPrice + fare));

                        // 添加数据
                        names[j] = name;
                        foodNames[j] = foodName;
                        foodNums[j] = foodNum;
                        times[j] = time;
                        addresses[j] = address;
                        sumPrices[j] = sumPrice + fare;
                        break;
                    }
                }
                if (!addFood) {
                    System.out.println("对不起。您的餐袋已满！");
                }
                break;
            case 2:
                // 查看餐袋
                System.out.println("***查看餐袋***");
                System.out.println("序号	订餐人	餐品信息	份数	送餐时间		送餐地址		总金额	订单状态");// 订单抬头
                for (int i = 0; i < ids.length; i++) {
                    if (names[i] != null) {// 名字不为空
                        String state = (states[i] == 0) ? "已预订" : "已完成";// 判断订单状态
                        // 输出订单详情
                        System.out.println(ids[i] + "	" + names[i] + "	" + foodNames[i] + "	" + foodNums[i] + "份"
                                + "	" + times[i] + "点" + "		" + addresses[i] + "	" + sumPrices[i] + "	" + state
                                + "	");
                    }
                }
                break;
            case 3:
                // 签收订单
                System.out.println("***签收订单***");
                boolean orderFind = false;// 查找订单
                System.out.print("请选择要签收的订单序号：");
                int orderId = sc.nextInt();
                for (int i = 0; i < names.length; i++) {
                    if (names[i] != null && states[i] == 0 && orderId == i + 1) {// 如果订餐人不为空，状态为已预订，订单号+1
                        states[i] = 1;// 订单状态转变
                        System.out.println("订单签收成功！");
                        orderFind = true;
                    } else if (names[i] != null && states[i] == 1 && orderId == i + 1) {
                        System.out.println("您选择的订单已完成签收，不能再次签收！");
                        orderFind = true;
                    }
                }
                if (!orderFind) {
                    System.out.println("您输入的订单不存在！请重新输入！");
                    orderId = sc.nextInt();
                }
                break;
            case 4:
                // 删除订单
                System.out.println("***删除订单***");
                boolean delOrder = false;// 查找删除订单
                System.out.print("请输入要删除的订单序号：");
                int delId = sc.nextInt();
                for (int i = 0; i < names.length; i++) {
                    if (names[i] != null && states[i] == 1 && delId == i + 1) {
                        delOrder = true;// 找到订单
                        for (int j = delId - 1; j < names.length - 1; j++) {// 删除元素，该位置后的元素向前进一步，向前一位赋值
                            names[j] = names[j + 1];
                            //foodNames[j] = foodNames[j + 1];
                            foodNums[j] = foodNums[j + 1];
                            times[j] = times[j + 1];
                            addresses[j] = addresses[j + 1];
                            sumPrices[j] = sumPrices[j + 1];
                            states[j] = states[j + 1];
                        }
                        // 赋值完毕后，清空最后一位元素
                        names[names.length - 1] = null;
                        //foodNames[names.length - 1] = null;
                        foodNums[names.length - 1] = 0;
                        times[names.length - 1] = 0;
                        addresses[names.length - 1] = null;
                        sumPrices[names.length - 1] = 0;
                        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！");
                        delOrder = true;
                    }
                }
                if (!delOrder) {
                    System.out.println("您要删除的订单不存在！请重新输入！");
                    delId = sc.nextInt();
                }
                break;
            case 5:
                // 点赞功能
                System.out.println("***我要点赞***");
                // 显示菜品信息
                System.out.println("序号	菜品	点赞数");// 订单抬头
                for (int i = 0; i < foodNames.length; i++) {
                    String goodNum = (goodNums[i]) > 0 ? goodNums[i] + "赞" : "";
                    System.out.println((i + 1) + "	" + foodNames[i] + "	" + goodNum);
                }
                System.out.print("请选择您要点赞的菜品序号：");
                int goodNum = sc.nextInt();
                goodNums[goodNum - 1]++;// 点赞+1
                System.out.println("点赞成功！");
                break;
            case 6:
                System.out.println("***退出系统***");
                flag = true;
                break;
            default:
                flag = true;
                break;
            }
            if (!flag) {
                System.out.print("输入0返回：");
                num = sc.nextInt();
            } else {
                break;
            }
        } while (num == 0);
        System.out.println("已成功退出吃货联盟“订餐系统”！");
    }
}

一、我要订餐 

二、查看菜袋

三、签收订单

四、删除订单

五、点赞

 六、退出系统