项目实战——网上订餐系统（Java）

项目实战——网上订餐系统（Java）

1.使用数组对象保存订单信息

String[] names=new String[4];String[] dishMegs=new String[4];int[] times=new int [4];String[] addresses=new String[4];int[] states=new int[4];double[] sumPrices=new double[4];

2.数据初始化

String[] dishNames={"红烧带鱼","鱼肉香丝","时令蔬菜"};double[] prices=new double[]{38.0,20.0,10.0};int[] praiseNums=new int[3];names[0]="Au";dishMegs[0]="红烧带鱼2份";times[0]=12;addresses[0]="gzgs31栋";sumPrices[0]=76.0;states[0]=1;names[1]="QJC";dishMegs[1]="时令蔬菜2份";times[1]=18;addresses[1]="gzgs31栋";sumPrices[1]=45.0;states[1]=0;

3.实现菜单切换

 Scanner input=new Scanner(System.in);int num=-1;boolean isExit=false;System.out.println("n欢迎使用“网上订餐系统");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.printf("请选择：");int choose= Int();boolean isAdd=false;boolean isSignFind=false;boolean isDelFind=false;switch (choose){case 1:System.out.println("***我要订餐***");break;case 2:System.out.println("***查看餐袋***");break;case 3:System.out.println("***签收订单***");break;case 4:System.out.println("***删除订单***");break;case 5:System.out.println("***我要点赞***");break;case 6:isExit=true;break;default:isExit=true;break;}if(!isExit){System.out.printf("输入0返回：");num= Int();}else{break;}}while (num==0);

4.实现”查看餐袋“

 System.out.println("***查看餐袋***");System.out.println("序号t 订餐人t 餐品信息tt送餐时间" + "tt送餐地址tt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)?"已预定":"已完成";String date=times[i]+"点";String sumPrice=sumPrices[i]+"元";System.out.println((i+1)+"tt"+names[i]+"tt"+dishMegs[i]+"tt"+date+"tt"+addresses[i]+"t"+sumPrice+"t"+state);}}break;

5.实现“我要订餐”

System.out.println("***我要订餐***");for (int j = 0; j < names.length; j++) {if (names[j]==null){isAdd=true;System.out.printf("请输入订餐人姓名：");String name= ();System.out.println("编号"+"t"+"菜名"+"t"+"单价"+"t"+"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)+"t"+dishNames[i]+"tt"  +price+"tt"+priaiseNum);}System.out.print("请选择您要点的菜品编号：");int chooseDish= Int();System.out.print("请输入您需要的份数：");int number= Int();String dishMeg=dishNames[chooseDish-1]+" "+number+"份";double sumPrice=prices[chooseDish-1]*number;double deliCharge=(sumPrice>=50)?0:5;System.out.printf("请输入送餐时间"+"(送餐时间是10点至20点整点)：");int time&#Int();while(time<10||time>20){System.out.printf("您的输入有误，请输入10~20的整数！");time= Int();}System.out.printf("请输入送餐地址：");String address= ();System.out.println("订餐成功！");System.out.println("您订的是："+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。");names[j]=name;dishMegs[j]=dishMeg;times[j]=time;addresses[j]=address;sumPrices[j]=sumPrice+deliCharge;break;}}if(!isAdd){System.out.println("对不起，您的餐袋已满！");}

6.实现“签收订单”

System.out.println("***签收订单***");System.out.print("请选择要签收的订单需序号：");int signOrderId&#Int();for (int i = 0; i < names.length; i++) {if(names[i]!=null && states[i]==0 && signOrderId==i+1){states[i]=1;System.out.println("订单签收成功！");isSignFind=true;} else if (names[i]!=null && states[i]==1 && signOrderId==i+1) {System.out.println("您选择的订单已完成签收，不能再次签收！");isSignFind=true;}}if(!isSignFind){System.out.println("您选择的订单不存在！");}

7.实现”删除订单“

System.out.println("***删除订单***");System.out.print("请输入要删除的订单号：");int delId= Int();for (int i = 0; i < names.length; i++) {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];times[j]=times[j+1];addresses[j]=addresses[j+1];states[j]=states[j+1];}int enIndex= names.length-1;names[enIndex]=null;dishMegs[enIndex]=null;times[enIndex]=0;addresses[enIndex]=null;states[enIndex]=0;sumPrices[enIndex]=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("您选择的订单为签收，不能删除！");isDelFind=true;break;}}if(!isDelFind){System.out.println("您要删除的订单不存在！");}

8.实现”我要点赞“

System.out.println("***我要点赞***");System.out.println("编号"+"t"+"菜名"+"t"+"单价");for (int i = 0; i < dishNames.length; i++) {String price=prices[i]+"元";String praiseNum=(praiseNums[i])>0 ? praiseNums[i]+"赞":"";System.out.println((i+1)+"t"+dishNames[i]+"tt"+price+"t"+praiseNum);}System.out.printf("请选择您要点赞的菜品编号：");int praiseNum&#Int();praiseNums[praiseNum-1]++;System.out.println("点赞成功！");

完整代码展示

import java.util.Scanner;public class Qjc {public static void main(String[] args) {String[] names=new String[4];String[] dishMegs=new String[4];int[] times=new int [4];String[] addresses=new String[4];int[] states=new int[4];double[] sumPrices=new double[4];String[] dishNames={"红烧带鱼","鱼肉香丝","时令蔬菜"};double[] prices=new double[]{38.0,20.0,10.0};int[] praiseNums=new int[3];names[0]="Au";dishMegs[0]="红烧带鱼2份";times[0]=12;addresses[0]="gzgs31栋";sumPrices[0]=76.0;states[0]=1;names[1]="QJC";dishMegs[1]="时令蔬菜2份";times[1]=18;addresses[1]="gzgs31栋";sumPrices[1]=45.0;states[1]=0;Scanner input=new Scanner(System.in);int num=-1;boolean isExit=false;System.out.println("n欢迎使用“网上订餐系统");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.printf("请选择：");int choose= Int();boolean isAdd=false;boolean isSignFind=false;boolean isDelFind=false;switch (choose){case 1:System.out.println("***我要订餐***");for (int j = 0; j < names.length; j++) {if (names[j]==null){isAdd=true;System.out.printf("请输入订餐人姓名：");String name= ();System.out.println("编号"+"t"+"菜名"+"t"+"单价"+"t"+"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)+"t"+dishNames[i]+"tt"  +price+"tt"+priaiseNum);}System.out.print("请选择您要点的菜品编号：");int chooseDish= Int();System.out.print("请输入您需要的份数：");int number= Int();String dishMeg=dishNames[chooseDish-1]+" "+number+"份";double sumPrice=prices[chooseDish-1]*number;double deliCharge=(sumPrice>=50)?0:5;System.out.printf("请输入送餐时间"+"(送餐时间是10点至20点整点)：");int time&#Int();while(time<10||time>20){System.out.printf("您的输入有误，请输入10~20的整数！");time= Int();}System.out.printf("请输入送餐地址：");String address= ();System.out.println("订餐成功！");System.out.println("您订的是："+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。");names[j]=name;dishMegs[j]=dishMeg;times[j]=time;addresses[j]=address;sumPrices[j]=sumPrice+deliCharge;break;}}if(!isAdd){System.out.println("对不起，您的餐袋已满！");}break;case 2:System.out.println("***查看餐袋***");System.out.println("序号t 订餐人t 餐品信息tt送餐时间" + "tt送餐地址tt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)?"已预定":"已完成";String date=times[i]+"点";String sumPrice=sumPrices[i]+"元";System.out.println((i+1)+"tt"+names[i]+"tt"+dishMegs[i]+"tt"+date+"tt"+addresses[i]+"t"+sumPrice+"t"+state);}}break;case 3:System.out.println("***签收订单***");System.out.print("请选择要签收的订单需序号：");int signOrderId&#Int();for (int i = 0; i < names.length; i++) {if(names[i]!=null && states[i]==0 && signOrderId==i+1){states[i]=1;System.out.println("订单签收成功！");isSignFind=true;} else if (names[i]!=null && states[i]==1 && signOrderId==i+1) {System.out.println("您选择的订单已完成签收，不能再次签收！");isSignFind=true;}}if(!isSignFind){System.out.println("您选择的订单不存在！");}break;case 4:System.out.println("***删除订单***");System.out.print("请输入要删除的订单号：");int delId= Int();for (int i = 0; i < names.length; i++) {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];times[j]=times[j+1];addresses[j]=addresses[j+1];states[j]=states[j+1];}int enIndex= names.length-1;names[enIndex]=null;dishMegs[enIndex]=null;times[enIndex]=0;addresses[enIndex]=null;states[enIndex]=0;sumPrices[enIndex]=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("您选择的订单为签收，不能删除！");isDelFind=true;break;}}if(!isDelFind){System.out.println("您要删除的订单不存在！");}break;case 5:System.out.println("***我要点赞***");System.out.println("编号"+"t"+"菜名"+"t"+"单价");for (int i = 0; i < dishNames.length; i++) {String price=prices[i]+"元";String praiseNum=(praiseNums[i])>0 ? praiseNums[i]+"赞":"";System.out.println((i+1)+"t"+dishNames[i]+"tt"+price+"t"+praiseNum);}System.out.printf("请选择您要点赞的菜品编号：");int praiseNum&#Int();praiseNums[praiseNum-1]++;System.out.println("点赞成功！");break;case 6:isExit=true;break;default:isExit=true;break;}if(!isExit){System.out.printf("输入0返回：");num= Int();}else{break;}}while (num==0);}
}