Java吃货联盟订餐系统

[code=java]

package cn.practice1200;import java.util.Scanner;public class Eater_Alliance {/** * 吃货联盟订餐系统 *  * @author QCD * @param args */public static void main(String[] args) {// TODO Auto-generated method stubScanner input = new Scanner(System.in);// 初始化3个数组存储菜品、价格、点赞数String[] dishNames = { "苦瓜炒鸡蛋", "红烧排骨", "辣子鸡丁", "石锅鱼", "麻婆豆腐" };double[] prices = { 15.0, 30.0, 35.0, 90.0, 20.0 };int[] praiseNums = new int[5];// 在初始化6个数组用于存储订单信息String[] names = new String[5];// 保存订餐人姓名String[] dishMegs = new String[5];// 保存所选菜品名int[] dishNums = new int[5];// 保存所选菜品份数int[] times = new int[5];// 保存送餐时间String[] addresses = new String[5];// 保存送餐地址int[] states = new int[5];// 保存订单状态：0表示已预订，1表示已完成double[] sumPrices = new double[5];// 保存订单的总金额// 初始化2条订单信息// 第1条names[0] = "王大锤";dishMegs[0] = "辣子鸡丁";dishNums[0] = 2;times[0] = 12;addresses[0] = "莞太路3号";states[0] = 0;sumPrices[0] = 70.0;// 第2条names[1] = "王大柱";dishMegs[1] = "麻婆豆腐";dishNums[1] = 1;times[1] = 19;addresses[1] = "建设路2号";states[1] = 1;sumPrices[1] = 25.0;/* 实现菜单切换 */System.out.println("欢迎使用“吃货联盟订餐系统”");int num = 1;// 用户输入0返回主菜单否则退出系统boolean isExit = false;// 标记用户是否退出系统，true为退出// 循环控制用户输入选择并执行do {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.print("请选择：");num = input.nextInt();// 用户输入所要选择进行的操作/* 使用switch结构来建立选择内容 */switch (num) {case 1:// 我要订餐System.out.println("***我要订餐***");boolean isAdd = false;// 记录是否可以点餐for (int i = 0; i < names.length; i++) {if (names[i] == null) {isAdd = false;System.out.print("请输入订餐人姓名：");String name = input.next();System.out.println("序号" + "\t" + "菜名" + "\t\t" + "单价" + "\t" + "点赞数");for (int j = 0; j < dishNames.length; j++) {System.out.println((j + 1) + "\t" + dishNames[j] + "\t\t" + prices[j] + "元" + "\t" + praiseNums[j]);}System.out.print("请选择您要点的菜品编号：");int chooseDish = input.nextInt();String dishMeg = dishNames[chooseDish - 1];System.out.print("请选择您需要的份数：");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 < 10 || time > 20) {System.out.print("您的输入有误，请输入10-20间的整数");time = input.nextInt();}System.out.print("请输入送餐地址：");String address = input.next();// 默认可以预定，不用写订单状态System.out.println("订餐成功！");System.out.println("您定的是：" + dishNames[chooseDish - 1] + number + "份");System.out.println("送餐时间：" + time + "点");double sumPrice = prices[chooseDish - 1] * number;// 计算餐费double sendMoney = (sumPrice >= 50) ? 0 : 5;// 计算送餐费System.out.println("餐费：" + sumPrice + "元，" + "送餐费" + sendMoney + "元，" + "总计："+ (sumPrice + sendMoney) + "元。");// 添加数据names[i] = name;dishMegs[i] = dishMeg;times[i] = time;dishNums[i] = number;addresses[i] = address;sumPrices[i] = sumPrice + sendMoney;break;}if (isAdd) {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\t订餐人\t餐品名称\t餐品数量\t送餐时间\t送餐地址\t总金额\t订单状态");for (int i = 0; i < names.length; i++) {if (names[i] != null) {String state = (states[i] == 0) ? "已预订" : "已完成";System.out.println((i + 1) + "\t" + names[i] + "\t" + dishMegs[i] + "\t" + dishNums[i] + "份"+ "\t" + times[i] + "\t" + addresses[i] + "\t" + sumPrices[i] + "元" + "\t" + state);}}break;case 3:// 签收订单System.out.println("***签收订单***");boolean isSignFind = false;System.out.print("请选择要签收的订单序号：");int sign = input.nextInt();for (int i = 0; i < names.length; i++) {if (names[i] != null && states[i] == 0 && sign == i + 1) {states[i] = 1;System.out.println("订单签收成功！");isSignFind = true;// 标记已找到的订单} else if (names[i] != null && states[i] == 1 && sign == i + 1) {System.out.println("您选择的订单已完成签收，不能再次签收！");isSignFind = true;// 标记已找到的订单}}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***");boolean isDelFind = false;System.out.print("请输入要删除的订单序号：");int delID = input.nextInt();for (int i = 0; i < names.length; i++) {// 根据状态值判断能不能删除，只有已完成的才能删除if (names[i] != null && states[i] == 1 && delID == i + 1) {isDelFind = true;for (int j = delID - 1; j < names.length - 1; j++) {names[j] = names[j + 1];dishMegs[j] = dishMegs[j + 1];dishNums[j] = dishNums[j + 1];times[j] = times[j + 1];addresses[j] = addresses[j + 1];states[j] = states[j + 1];sumPrices[j] = sumPrices[j + 1];}// 将最后一位清空names[names.length - 1] = null;dishMegs[names.length - 1] = null;dishNums[names.length - 1] = 0;times[names.length - 1] = 0;addresses[names.length - 1] = null;states[names.length - 1] = 0;sumPrices[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) {isDelFind = true;System.out.println("您选择的订单未签收，不能删除！");break;}} // 未找到的订单不能删除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 priaiseNum = (praiseNums[i] > 0) ? praiseNums[i] + "赞" : "";System.out.println((i + 1) + "\t" + dishNames[i] + "\t" + prices[i] + "元" + priaiseNum);}System.out.print("请选择您要点赞的菜品序号：");int number = input.nextInt();praiseNums[number - 1]++;System.out.println("点赞成功");break;case 6:// 退出系统isExit = true;break;default:// 退出系统isExit = true;break;}// 返回主界面if (!isExit) {System.out.print("输入0返回：");num = input.nextInt();} else {break;}} while (num == 0);System.out.println("谢谢惠顾，欢迎您再次使用！");input.close();}}

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