用JAVA基础知识制作简易《订单系统》(适用于初学者学习)
import java.util.Scanner;
public class OrderingMsg {
public static void main(String[] args) throws Exception {
Scanner scanner = new Scanner(System.in);
String[] names = new String[6]; // 订餐人姓名
String[] dishMsgs = new String[6];// 选择菜品
int[] numbers = new int[6];// 菜品份数
int[] times = new int[6]; // 送餐时间
String[] addresses = new String[6];// 送餐地址
int[] states = new int[6];// 订单状态 0:已经预定 1：已经完成
double[] sumPrices = new double[6];// 总金额
int[] praiseNums = new int[6];
String[] dishNames = { “北京烤鸭”, “麻婆豆腐”, “松鼠鱼”, “红烧带鱼”, “时令蔬菜”, “辣土豆丝” };
double[] prices = { 88, 24, 38, 35, 15, 12 };
System.out.println(“欢迎进入surper订餐系统”);
int num = -1; // 输入0 默认返回主菜单
boolean isExit = false;// 默认不退出
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.println(“请选择：”);
int choice = scanner.nextInt(); //选择你所需要的服务
switch (choice) {
case 1:
System.out.println(“************我要订餐************”);
boolean empty = false;//作一个标记
for (int i = 0; i < names.length; i++) { // 订餐人的集合
if (names[i] == null) {
empty = true;//订单如果是空的，便可以往里加数据
System.out.println(“请输入订餐人的姓名：”);
names[i] = scanner.next(); // 获取订餐人的姓名
System.out.println(“您可以选择下列的菜品：”);
System.out.println(“序号\t\t\t菜名\t\t\t单价\t\t\t点赞数”);
for (int j = 0; j < dishNames.length; j++) { // 遍历菜品
String praiseNum = (praiseNums[j] > 0) ? praiseNums[j]
+ “个赞”
: “”;
System.out.println(j + 1 + “\t\t\t” + dishNames[j]
+ “\t\t\t” + prices[j] + “\t\t\t”
+ praiseNum);
}
// 用户开始点菜，并收集信息
System.out.println(“请您选择菜品的编号：”);
int choiceName = scanner.nextInt();
System.out.println(“请您输入点餐的份数：”);
int number = scanner.nextInt();
System.out.println(“请您输入送餐的地址：”);
String address = scanner.next();
System.out.println(“请您输入送餐的时间：”);
System.out.println(“本店整点送餐：8点至20点”);
int time = scanner.nextInt();
double sumPrice = prices[choiceName – 1] * number;
double price = (sumPrice >=50) ? 0 : 5;//判断是否收取运费
System.out.println(“订单已生成！”);
System.out.println(“您定的菜品是：”+ dishNames[choiceName – 1] + “\t” + number+ “份”);
System.out.print(“餐费：” + sumPrice);
System.out.print(“\t送餐费：” + price);
System.out.println(“\t总费用：” + (price + sumPrice));
// 把输入的信息塞进数组中
times[i] = time; // 时间
addresses[i] = address; // 地址
sumPrices[i] = (sumPrice + price); // 总金额
dishMsgs[i] = dishNames[choiceName – 1]; // 定的菜品
states[i] = 0; // 订餐的状态
numbers[i] = number; // 份数
break;
}
}
if (!empty) {// 餐袋已经满了
System.out.println(“餐袋已经满了”);
}
break;
case 2:
System.out.println(“************查看餐袋************”);
System.out.println(“编号\t\t订餐人\t\t菜品(份数)\t\t送餐时间 \t\t送餐地址\t\t总金额\t\t状态\t\t点赞数量”);
for (int i = 0; i < names.length; i++) {
if (names[i] != null) { // 有人订餐 的显示
String state = (states[i] == 0) ? “已经预定” : “已经完成”; // 获取状态
int time = times[i]; // 时间
String sumPrice = sumPrices[i] + “元”; // 总金额
String address = addresses[i]; // 地址
String dishMsg = dishMsgs[i]; // 菜品
int count = numbers[i];//份数
System.out.println((i + 1) + “\t\t” + names[i] + “\t\t”+ dishMsg + “(” + count + “)” + “\t\t” + time+ ” \t\t” + address + “\t\t” + sumPrice+ “\t\t” + state + “\t\t” + praiseNums[i]);
}
}
break;
case 3:
System.out.println(“************签收订单************”);
System.out.println(“请您输入需要签收的订单编号：”);
int sign = scanner.nextInt();
int flag = 0;// 作一个标记，来判断订单是否被签收
for (int i = 0; i < names.length; i++) {
if (names[i] != null && states[i] == 0) {//有订单并且可以签收
states[i] = 1;// 改变状态
flag = 1;
break;
} else if (names[i] != null && states[i] == 1) {//有订单，并且已被签收
flag = 2;
}
}
if (flag == 1) {
System.out.println(“订单已经签收！”);
} else if (flag == 2) {
System.out.println(“订单不能重复签收！”);
} else {
System.out.println(“没有找到您的订单！请您核对编号！”);
}
break;
case 4:
System.out.println(“************删除订单************”);
System.out.println(“请您输入需要删除的订单编号：”);
int dealNum = scanner.nextInt();
int deal = 0; // 作一个标记 来判断订单是否被签收以及是否存在
for (int i = 0; i < names.length; i++) {
if (names[i] != null && states[dealNum – 1] == 1) { //有订单，并且已签收，可以删除
// 删除一条信息，将之后的所有信息，依次向前移
for (int j = dealNum – 1; j < names.length – 1; j++) {
names[j] = names[j + 1]; // 订餐人
dishMsgs[j] = dishMsgs[j + 1];// 菜品
times[j] = times[j + 1];// 时间
addresses[j] = addresses[j + 1];// 地址
states[j] = states[j + 1];// 状态
numbers[j] = numbers[j + 1];// 份数
}
deal = 1;
break;
} else if (names[i] != null && states[i] == 0) { // 右订单并且订单还没有签收，便不能删除
deal = 2;
}
}
if (deal == 1) {
System.out.println(“订单已经被删除”);
} else if (deal == 2) {
System.out.println(“订单还没有签收 不允许删除！”);
} else {
System.out.println(“没有找到指定的订单！”);
}
break;
case 5:
System.out.println(“************我要点赞***************”);
System.out.println(“编号\t\t\t菜名\t\t\t价格”);
for (int i = 0; i < dishNames.length; i++) { // 遍历所有的菜名
String price = prices[i] + “元”; //价格
String name = dishNames[i];//菜名
System.out.println((i + 1) + “\t\t\t” + name + “\t\t\t”+ price);
}
System.out.println(“请您输入点赞的菜品编号：”);
int choiceNum = scanner.nextInt();
praiseNums[choiceNum – 1]++;// 点赞数累加
System.out.println(“谢谢参与！点赞成功！”);
break;
case 6:
// 退出系统
isExit = true;
break;
default:
// 退出系统
isExit = true;
break;
}
if (!isExit) { // 默认这是不退出
System.out.println(“输入0返回主菜单！”);
num = scanner.nextInt();
} else {
break; // 退出系统
}
} while (num == 0);
System.out.println(“谢谢您的光临！！！！！”);
}
}