Java——吃货联盟订餐系统

public static void main(String[] args) {

String[] names = new String[4];  //订餐人姓名
String[] dishMegs = new String[4];  //保存菜品名及份数
int[] times =new int[4];  //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表示已预订，1表示已完成
double[] sumPrices = new double[4];   //保存订单的总金额

//初识化订单信息
names[0]="张青";
dishMegs[0]="红烧带鱼 2份";
times[0]=12;
addresses[0]="天成路207号";
states[0]=1;
sumPrices[0]=76.0;

names[1]="张青";
dishMegs[1]="鱼香肉丝 2份";
times[1]=18;
addresses[1]="天成路207号";
states[1]=0;
sumPrices[1]=45.0;

String[] dishNames ={"红烧带鱼","鱼香肉丝","时冷鲜疏"};  //菜单
double[] prices ={38.0,20.0,10.0};       //价格
int[] praiseNums =new int[]{58,45,50};   //点赞数

Scanner input = new Scanner(System.in);
int num=-1;      //用户输入0返回菜单，否则退出
boolean isExit=false;  //标志用户是否退出系统；true 为退出系统

System.out.println("\t欢迎使用“吃货联盟订餐系统”");
auter:
do{
System.out.println("**************************************");
System.out.println("\t  1、我要订餐");
System.out.println("\t  2、查看餐袋");
System.out.println("\t  3、签收订单");
System.out.println("\t  4、删除订单");
System.out.println("\t  5、我要点餐");
System.out.println("\t  6、退出系统");
System.out.println("**************************************");
System.out.println("请选择:");
int choose = input.nextInt();
switch(choose){
case 1:
System.out.println("***我要订餐***");
System.out.println("请输入订餐人姓名:");
String name=input.next();

boolean isAdd = false; //记录是否可以订餐
for (int i = 0; i < names.length; i++) {
if(names[i]==null){
isAdd = true;
System.out.println("序号\t菜品名称\t菜品单价\t点赞数");

for (int j = 0; j < dishNames.length; j++) {
System.out.println((j+1)+"\t"+dishNames[j]+"\t "+prices[j]+"\t "+praiseNums[j]);
}

System.out.println("请选择您要点的菜品编号:");
int chooseDich = input.nextInt();
System.out.println("请选择您需要的份数:");
int number = input.nextInt();

//得到订餐信息
String dishMeg=dishNames[chooseDich-1]+" "+number+"份";
//订餐总金额
double sumPrice = prices[chooseDich-1] *number;
//订餐满50元，免送餐费5元
double deliCharge =(sumPrice>=50)? 0:5;

System.out.println("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.println("您输入有误,请重新输入10~20间的整数!");
time = input.nextInt();
}

System.out.println("请输入送餐地址:");
String address = input.next();
//无需添加状态，默认为0
System.out.println("订餐成功!");

System.out.println("您定的是:"+dishMeg);
System.out.println("送餐时间:"+time);
System.out.println("餐费:"+sumPrice+"元,送餐费"+deliCharge+"元,总计:"+(sumPrice+deliCharge)+"元");
System.out.println();
//添加数据
names[i]=name;
dishMegs[i]=dishMeg;
times[i]=time;
addresses[i]=address;
sumPrices[i]=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订餐信息\t\t送餐时间\t送餐地址\t\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"+times[i]+"\t"+addresses[i]+"\t"+sumPrices[i]+"\t"+state);
}
}

break;
case 3:
System.out.println("***签收订单***");
System.out.println("签收订单的序号:");
int delId=input.nextInt();
boolean isSignFind = false;
for (int i = 0; i < names.length; i++) {
if(names[i]!=null && i ==(delId-1) && states[i]==0){
states[i]=1;   //状态改为 1
System.out.println("订单签收成功");
isSignFind=true;
break;
}else if(names[i]!=null && i ==(delId-1) && states[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.println("输入要删除的订单编号:");
int dinId=input.nextInt();
boolean isDelFind=false;
for (int i = 0; i < names.length; i++) {
if(names[i]!=null && states[i]==1 && i==(dinId-1)){
isDelFind=true;
for (int j = i; 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];
sumPrices[j]=sumPrices[j+1];
}

//数组最后一位清空
int endIndex =names.length-1;
names[endIndex]=null;
dishMegs[endIndex]=null;
times[endIndex]=0;
addresses[endIndex]=null;
states[endIndex]=0;
sumPrices[endIndex]=0;
System.out.println("删除订单成功!");
break;
}else if(names[i]!=null && states[i]==0 && i==(dinId-1)){
System.out.println("您选择的订单未签收,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("序号\t菜品名称\t菜品单价\t点赞数");

for (int j = 0; j < dishNames.length; j++) {
System.out.println((j+1)+"\t"+dishNames[j]+"\t "+prices[j]+"\t "+praiseNums[j]);
}
System.out.println("请输入您要点赞的菜品序号:");
int priaiseNum = input.nextInt();
praiseNums[priaiseNum-1]+=1;
System.out.println("点赞成功!");
break;
case 6:
System.out.println("退出系统!");
break auter;
default:
isExit=true;
break;
}

if(!isExit){
System.out.println("输入0返回");
num=input.nextInt();
}

}while(num==0);
System.out.println("欢迎使用订餐系统");
}