吃货联盟订餐系统

package day06;
import java.util.*;
public class Demo1 {
    public static void main(String[] args) {
        String[] dishNames = {"红烧带鱼","鱼香肉丝","时令蔬菜"};//菜品名称
        double[] prices = new double[] {38.0,20.0,10.0};//菜品价格
        int[] praiseNums = new int[3];//点赞数
        //存储订单信息
        String[] names = new String[4];//保存订单人姓名
        String[] dishMegs = new String[4];//保存菜品和份数
        int[] times = new int[4];//保存送餐时间
        String[] addresses = new String[4];//保存送餐地址
        int[] states = new int[4];//保存订单状态；0表示已经预定，1表示已经完成
        double[] sumPrieces = new double[4];//保存订单的总金额

        Scanner input = new Scanner(System.in);
        int num = -1;//用户输入9时返回主菜单，否则退出系统
        boolean isExit = false;//标志用户是否退出系统；true为退出系统
        System.out.println("
 欢迎使用“吃货联盟订餐系统”");
        //循环，现实菜单，根据用户选择的数字执行相应功能
        do {
            //现实菜单
            System.out.println("***************************");
            System.out.println("1.我要订餐");
            System.out.println("2.查看菜单");
            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：");
            int choose = input.nextInt();//记录用户选择的功能


            //根据用户输入的功能，执行相应的命令
            switch (choose){
                case 1:
                    //我要订餐
                    System.out.println("***我要订餐***");
                    Boolean isAdd = false;
                    for(int j =0;j<names.length;j++){
                        if(names[j]==null){
                            isAdd =true;
                            System.out.print("请输入订单人姓名：");
                            String name =input.next();
                            //显示可以提供选择的菜单
                            System.out.println("序号"+"	"+"菜名"+"	"+"单价"+"	"+"点赞数");
                            for(int i =0;i<dishNames.length;i++){
                                String price = prices[i] +"元";
                                String priaiseNum = (praiseNums[i] > 0? praiseNums[i]+"赞":"0");
                                System.out.println((i+1)+"	" +dishNames[i]+"	" +price+ "	" +priaiseNum);
                            }
                            //用户点菜
                            System.out.print("请选择您要点的菜单编号:");
                            int chooseDish = input.nextInt();
                            System.out.print("请选择您需要的份数：");
                            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.print("请输入送餐时间（送餐时间是10点到20点整点送餐）：");
                            int time =input.nextInt();
                            while(time<10|| time>20){
                                System.out.print("您输入有误，请输入10-20点！");
                                time =input.nextInt();
                            }
                            System.out.print("请输入送餐地址：");
                            String address =input.next();

                            //无需添加状态，默认是0，则为已经预订
                            System.out.println("订餐成功!");
                            System.out.println("您的订餐时间是："+dishMeg);
                            System.out.println("送餐时间："+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;
                            sumPrieces[j] = sumPrice;
                            break;
                        }
                    }
                    if(!isAdd){
                        System.out.println("对不起，您的餐袋已经满了！");
                    }
                    break;
                case 2:
                    //查看菜单
                    System.out.println("***查看菜单***");
                    System.out.println("序号	 订单人	 餐品信息		 送餐时间	 送餐地址		 总金额	 订单状态");
                    for(int i=0;i<names.length;i++){
                        if(names[i]!=null){
                            String state = (states[i]==0?"已经预定":"已经完成");
                            String date = times[i]+"点";
                            String sumPrice = sumPrieces[i]+"元";
                            System.out.println((i+1)+"	"+names[i]+"	" + dishMegs[i]+"	" +date+"	" +addresses[i]+"" +
                                    "	" +sumPrice+"	" +state);
                        }
                    }
                    break;
                case 3:
                    //签收订单
                    System.out.println("***签收订单***");
                    boolean isSignFind = false;//找到要签收的订单
                    System.out.print("请选择要签收的订单序号：");
                    int signOrderId = input.nextInt();
                    for(int i = 0;i<names.length;i++){
                        //订单状态为预订，序号为用户输入的订单号减1，可签收
                        //订单状态为完成，序号为用户输入的订单号减1，不可签收
                        if(names[i]!=null&& states[i]==0&&signOrderId==i+1){
                            states[i] =1;
                                System.out.println("订单已经签收成功！");
                                isSignFind = true;
                        }else if(names[i]!=null && states[i]==1 && signOrderId==i+1){
                            System.out.println("你选择的订单已经完成签收，不能再次签收！");
                            isSignFind = true;
                        }
                    }
                    //未找到的订单序号，不能签收
                    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***");
                    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++){
                        //状态值为已完成，序号值为用户输入的序号减1，可删除
                        //状态值为已经预定，序号值为用户输入的序号减1，不可删除
                        if(names[i]!=null&&states[i]==1&&delId==i+1){
                            isDelFind=true;
                            //执行删除操作，删除位置后的元素一次前移
                            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];
                                sumPrieces[j] = sumPrieces[j+1];
                            }
                            //最后一位清空
                            int endIndex = names.length-1;
                            names[endIndex] = null;
                            dishMegs[endIndex] = null;
                            times[endIndex] = 0;
                            addresses[endIndex] = null;
                            states[endIndex] = 0;
                            sumPrieces[endIndex] = 0;
                            System.out.println("删除订单成功！");
                            break;
                        }
                    }
                    //未找到订单序号，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***");
                    //显示菜单名
                    System.out.println("序号"+"	"+"菜名"+"	"+"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)+"	" + dishNames[i]+"	" +price+"	" +priaiseNum);
                    }
                    System.out.print("请选择您要点赞的菜品序号：");
                    int priaiseNum = input.nextInt();
                    praiseNums[priaiseNum-1]++;//点赞数加1
                    System.out.println("点赞成功！");
                    break;
                case 6:
                    //退出系统
                    isExit =true;
　　　　　　　　　　　　System.out.println("欢迎下次再使用！！！祝你贪吃不胖！！！");
                    break;
                default:
                    isExit=true;
                    break;
            }







            if(!isExit){
                System.out.print("输入0返回：");
                num =input.nextInt();
            }else {
                break;
            }
        }while (num == 0);
    }
}