Java吃货联盟订餐系统代码实例

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 stub
		Scanner 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();
	}
 
}