java实现吃货联盟订餐系统_学习笔记

public class OrderingSet {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[] sumPrice = new double[4];}

import java.util.Scanner;public class OrderingUtil {Scanner input = new Scanner(System.in);String[] dishNames = new String[] { "红烧带鱼", "鱼香肉丝", "时令鲜蔬" };// 菜品名称double[] prices = new double[] { 38.0, 20.0, 10.0 };// 菜品单价int[] praiseNums = new int[3];// 点赞数// 创建订单对象OrderingSet oSet = new OrderingSet();// 初始化两条订单public void initial() {// 初始化第一条订单信息oSet.names[0] = "张晴";oSet.dishMegs[0] = "红烧牛肉 2份";oSet.times[0] = 3;oSet.addresses[0] = "天成路207号";oSet.states[0] = 1;oSet.sumPrice[0] = 76.0;// 初始化第二条订单信息oSet.names[1] = "张晴";oSet.dishMegs[1] = "鱼香肉丝 2份";oSet.times[1] = 10;oSet.addresses[1] = "天成路207号";oSet.states[1] = 0;oSet.sumPrice[1] = 45.0;System.out.println("name\tdishMegs\ttimes\taddresses\tstates\tsumPrices");System.out.println(oSet.names[0] + "\t" + oSet.dishMegs[0] + "\t"+ oSet.times[0] + "\t" + oSet.addresses[0] + "\t"+ oSet.states[0] + "\t" + oSet.sumPrice[0]);System.out.println(oSet.names[1] + "\t" + oSet.dishMegs[1] + "\t"+ oSet.times[1] + "\t" + oSet.addresses[1] + "\t"+ oSet.states[1] + "\t" + oSet.sumPrice[1]);}public void startMenu() {int num;// 用户输入0返回主菜单,否则退出系统boolean isExit = false;// 标志用户是否返回主菜单,true为退出系统System.out.println("欢迎使用“吃货联盟订单系统”");// 循环:显示菜单,根据用户选择的数字执行相应功能do {// 显示菜单System.out.println("***********************");System.out.println("1.我要订餐\n2.查看餐袋\n3.签收订单\n4.删除订单\n5.我要点赞\n6.退出系统");System.out.println("***********************");System.out.println("请选择:");num = input.nextInt();// 记录用户现则的功能编号// 根据用户输入的功能编号,执行相应功能switch (num) {case 1:System.out.println("***我要订餐***");add();break;case 2:System.out.println("***查看餐袋***");display();break;case 3:System.out.println("***签收订单***");sign();break;case 4:System.out.println("***删除订单***");delete();break;case 5:System.out.println("***我要点赞***");praise();break;default:System.out.println("谢谢使用,欢迎下次光临!");isExit = true;break;}if (!isExit) {System.out.println("输入0返回:");num = input.nextInt();} else {break;}} while (num == 0);}public void display() {System.out.println("序号\t订餐人\t餐品信息\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 < oSet.names.length; i++) {if (oSet.names[i] != null) {String state = (oSet.states[i] == 0) ? "已预订" : "已完成";String date = oSet.times[i] + "点";String sumPrice = oSet.sumPrice[i] + "元";System.out.println((i + 1) + "\t" + oSet.names[i] + "\t"+ oSet.dishMegs[i] + "\t" + date + "\t"+ oSet.addresses[i] + "\t" + sumPrice + "\t" + state);}}}public boolean add() {boolean isAdd = false;// 记录是否可以订餐for (int j = 0; j < oSet.names.length; j++) {if (oSet.names[j] == null) {// 找到第一个空位置,可以添加订单信息`isAdd = true;// 置标志位,可以订餐System.out.println("请输入订餐人姓名:");String name = input.next();// 显示供选择的菜品信息System.out.println("序号\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] + "\t"+ price + "\t" + priaiseNum);}// 用户点菜System.out.println("请选择您要点的菜品编号:");int chooseDish = input.nextInt();System.out.println("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.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("您的输入有误,请输入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,默认是0,即已预订状态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+ "总计:" + (+sumPrice) + "元");// 添加数据oSet.names[j] = name;oSet.dishMegs[j] = dishMeg;oSet.times[j] = time;oSet.addresses[j] = address;oSet.sumPrice[j] = sumPrice;break;}}if (!isAdd) {System.out.println("对不起,您的餐袋已满!");return false;}return true;}public void sign() {boolean isSignFind = false;// 找到要签收的订单System.out.println("请选择要签收的订单序号:");int signOrderId = input.nextInt();for (int i = 0; i < oSet.names.length; i++) {// 状态为已预订,序号为用户输入的订单号减1:可签收// 状态为已完成,序号为用户输入的订单号减1:不可签收if (oSet.names != null && oSet.states[i] == 0&& i == signOrderId - 1) {oSet.states[i] = 1;// 将状态值设置为已完成System.out.println("订单签收成功");isSignFind = true;} else if (oSet.names != null && oSet.states[i] == 1&& i == signOrderId - 1) {System.out.println("您选择的订单已完成签收,不能再次签收!");isSignFind = true;// 标记已找到此订单}}// 未找到的订单序号,不可签收if (!isSignFind) {System.out.println("您选择的订单不存在!");}}public void delete() {boolean isDelFind = false;// 标示是否找到要删除的订单System.out.println("请输入要删除的订单序号:");int delId = input.nextInt();for (int i = 0; i < oSet.names.length; i++) {// 状态为已完成,序号为用户输入的订单号减1:可删除// 状态为已预订,序号为用户输入的订单号减1:不可删除if (oSet.states[i] == 1 && delId == i + 1 && oSet.names[i] != null) {isDelFind = true;// 标记已找到此订单// 执行删除操作:删除位置后的元素依次前移for (int j = 0; j < oSet.names.length; j++) {oSet.names[j] = oSet.names[j + 1];oSet.dishMegs[j] = oSet.dishMegs[j + 1];oSet.times[j] = oSet.times[j + 1];oSet.addresses[j] = oSet.addresses[j + 1];oSet.states[j] = oSet.states[j + 1];oSet.sumPrice[j] = oSet.sumPrice[j + 1];}// 最后一位清空int endIndex = oSet.names.length - 1;oSet.names[endIndex] = null;oSet.dishMegs[endIndex] = null;oSet.times[endIndex] = 0;oSet.addresses[endIndex] = null;oSet.states[endIndex] = 0;oSet.sumPrice[endIndex] = 0;System.out.println("删除订单成功");break;} else if (oSet.states[i] == 0 && delId == i + 1&& oSet.names != null) {System.out.println("您选择的订单未签收,不能删除!");isDelFind = true;// 标记已找到此订单break;}}// 未找到该序号的订单,不能删除if (!isDelFind) {System.out.println("您要删除的订单不存在!");}}public void praise() {// 显示菜品信息System.out.println("序号\t菜名\t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) + "\t" + dishNames[i] + "\t" + prices[i]);}System.out.println("请选择您要点赞的菜品编号:");int priaiseNum = input.nextInt();praiseNums[priaiseNum - 1]++;// 赞数加1System.out.println("点赞成功!");}}

public class OrderingMgr {    public static void main(String[] args) {        OrderingUtil OU = new OrderingUtil();        OU.startMenu();        OU.initial();        OU.add();        OU.sign();        OU.delete();        OU.praise();        OU.display();    }}