用Java做一個吃貨聯(lián)盟訂餐系統(tǒng) 詳細項目實戰(zhàn)介紹

public class OrderingMsg {

	public static void main(String[] args) {
		//初始化數(shù)據(jù)
		//數(shù)據(jù)主體：一組訂單信息
		String[] names = new String[4];         //訂餐人姓名
		String[] dishMegs = new String[4];      //所選菜品
		int[] times = new int[4];               //送餐時間
		String[] addresses = new String[4];       //送餐地址
		int[] states = new int[4];               //訂單狀態(tài)：0 已預購 1 已完成
		double[] sumPrices = new double[4];     //總金額
		
		//初始化兩個訂單信息
		names[0] = "蓋倫";
		dishMegs[0] = "紅燒帶魚 2份";
		times[0] = 3;
		addresses[0] = "德瑪西亞";
		sumPrices[0] = 76.0;
		states[0] = 1;
		
		names[1] = "拉克絲";
		dishMegs[1] = "紅燒帶魚 1份";
		times[1] = 10;
		addresses[1] = "德瑪西亞";
		sumPrices[0] = 20;
		
		//供選擇的菜品信息
		String[] dishNames = {"紅燒帶魚","魚香肉絲","時令蔬菜"};
		//菜品單價
		double[] prices = new double[] {38.0,20.0,10};
		int[] praiseNums = new int[3];
		Scanner input = new Scanner(System.in);
		//用戶輸入0返回主菜單，否則退出系統(tǒng)
		int num = -1;
		//標記用戶是否提出系統(tǒng) true:退出系統(tǒng)
		boolean isExit = false;
		System.out.println("
歡迎使用吃貨聯(lián)盟系統(tǒng)");
		//循環(huán):顯示菜單，根據(jù)用戶選擇，執(zhí)行響應功能
		do {
			//顯示菜單
			System.out.println("*******************");
			System.out.println("1:我要訂餐");
			System.out.println("2:查看餐袋");
			System.out.println("3:簽收訂單");
			System.out.println("4:刪除訂單");
			System.out.println("5:我要點贊");
		    System.out.println("6:退出系統(tǒng)");
		    System.out.println("*******************");
		    System.out.println("請選擇:");
			//記錄客戶選擇功能的編號
		    int choose = input.nextInt();
		    //記錄用戶選擇的功能編號
		    boolean isAdd = false;
		    //找到要簽收的訂單
		    boolean isSignFind = false;
		    //找到要刪除的訂單
		    boolean isDelFind = false;
		    //根據(jù)用戶選擇的功能編號執(zhí)行響應功能
		    switch (choose) {
			
		    case 1:
		    	//我要訂餐
				System.out.println("*********我要訂餐*********");
				//循環(huán)展示菜單
				for (int j = 0; j <names.length; j++) {
					//找到第一個空位置,可以添加訂單信息
					if(names[j]==null) {
						//標記位置,可以訂餐
						isAdd =true;
						System.out.println("請輸入訂餐人的姓名:");
						String name = input.next();
						//顯示供選擇的菜品信息
						System.out.println("序號"+"	"+"菜名"+"	"+"單價");
						for (int i = 0; i < dishNames.length; i++) {
							String price = prices [i] +"元";
							String priaiseNum =(praiseNums[i])>0?praiseNums[i]+"贊":"";
							System.out.println((i+1)+"	"+dishNames[i]+"	"+price+"	"+priaiseNum);
						}
						//用戶點菜
						System.out.println("請選擇您要點的菜品編號:");
						int chooseDish = input.nextInt();
						System.out.println("請選擇您需要的份數(shù):");
						int number = input.nextInt();
					 String  dishMeg =	dishNames[chooseDish-1]+""+number+"份";
					 double sumPrice = prices[chooseDish-1]*number;
					 //餐費滿50元,免送餐費10元
					 double deliCharge =(sumPrice>=50)?0:6;
					 System.out.println("請輸入送餐時間(送餐時間是10點至20點間整點送餐:)");
					 int time = input.nextInt();
					 while (time<10||time>20) {
						 System.out.println("您輸入有誤,請輸入10~20間的整數(shù)!");
						 time = input.nextInt();
					 }
					 System.out.println("請輸入送餐地址:");
					 String address =input.next();
					 //無需添加狀態(tài),默認是0,即已預訂狀態(tài).
					 System.out.println("訂餐成功!");
					 System.out.println("您訂的是:"+dishMeg);
					 System.out.println("送餐時間是:"+time+"點");
					 System.out.println("餐費:"+sumPrice+"元,送餐費"+deliCharge+"元,總計:"+(sumPrice+deliCharge)+"元");
					 //添加數(shù)據(jù)
					 names[j]=name;
					 dishMegs[j] =dishMeg;
					 times[j] =time;
					 addresses[j] =address;
					 sumPrices[j] =sumPrice+deliCharge;
					 break;
					}
				}
				if(!isAdd) {
					System.out.println("對不起,您的餐袋已滿!");
				}
		    	break;
		    case 2:
		    	 //查看餐袋
				System.out.println("*********查看餐袋**********");
				System.out.println("序號	訂餐人	餐品信息		送餐時間		總金額	訂單狀態(tài)");
				for (int i = 0; i < names.length; i++) {
					//查看餐袋中的內(nèi)容，如果是空就跳出，不在查看
					if (names[i]==null) {
						String state = (states[i]==0)?"已預定":"已完成";
						String data = times[i]+"日";
						String sumPrice = sumPrices[i]+"元";
						System.out.println((i+1)+"	"+names[i]+"	"+dishMegs[i]+"	"+addresses[i]+"	"+sumPrice+"	"+state);
					}
				}
		    	break;
		    case 3:
		    	//簽收訂單
		    	System.out.println("*********簽收訂單**********");
		    	System.out.println("請選擇要簽收的訂單序號:");
		    	int signOrder = input.nextInt();
		    	for (int i = 0; i < names.length; i++) {
					//狀態(tài)為已預定，序號為用戶輸入的訂單序號：可簽收
		    		//狀態(tài)為已完成，序號為用戶輸入訂單序號：不可簽收
		    		if (names[i]!=null&&states[i]==1&&signOrder==i+1) {
						System.out.println("您選擇的訂單已完成簽收，不能再次簽收");
						isSignFind = true;
					}
				}
		    	//未找到的訂單序號:不可簽收
		    	if (!isSignFind) {
					System.out.println("您選擇的訂單不存在!");
				}
		    	break;
		    case 4:
		    	//刪除訂單
		    	System.out.println("*********刪除訂單**********");
		    	System.out.println("請輸入要刪除的訂單序號:");
		    	int delId = input.nextInt();
		    	for (int i = 0; i < names.length; i++) {
					//狀態(tài)值為已完成 選侯志為用戶輸入的序號：可刪除
		    		//狀態(tài)值為已預定 序號值為用戶輸入的序號：不可刪除
		    		if (names[i]!=null&&states[i]==1&&delId==i+1) {
						isDelFind = true;
						//執(zhí)行刪除操作：刪除位置后的元素依次前移
						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];
						}
						//最后一位清空
						names[names.length-1] = null;
						dishMegs[dishMegs.length-1] = null;
						times[names.length] = 0;
						addresses[names.length-1] = null;
						states[names.length-1] = 0;
						System.out.println("刪除訂單成功!");
						break;
					}else if (names[i]!=null&&states[i]==0&&delId==i+1) {
						System.out.println("您選擇的訂單未簽收，不能刪除!");
						isDelFind = true;
						break;
					}
				}
		    	//未找到該序號的訂單，不能刪除
		    	if (isDelFind) {
					System.out.println("您要刪除的訂單不存在!");
				}
		    	break;
		    case 5:
		    	//我要點贊
		    	System.out.println("*********我要點贊**********");
		    	//顯示菜品信息
		    	System.out.println("序號"+"	"+"菜名"+"	"+"單價");
		    	for (int i = 0; i < dishNames.length; i++) {
					String price = prices[i]+"元";
					String praiseNum = (praiseNums[i])>0?praiseNums[i]+"贊":"";
					System.out.println((i+1)+"	"+dishNames[i]+"	"+price+"	"+praiseNum);
				}
		    	System.out.println("請選擇您要點贊的菜品序號:");
		    	int praiseNum = input.nextInt();
		    	praiseNums[praiseNum-1]++;   //點贊數(shù)+1
		    	System.out.println("點贊成功");
		    	break;
		    case 6:
		    	//退出系統(tǒng)
		    	isExit = true;
		    	break;
		    	default:
		    		//退出系統(tǒng)
		    		isExit = true;
		    	    break;
		    	    
	}
		    if (isExit) {
				System.out.println("返回0輸出:");
				num = input.nextInt();
			}else {
				break;
			}
        }while (num==0);
		System.out.println("感謝使用，歡迎下次光臨");
   }
}