文章目录
- 为什么使用面向对象
- 划分类
- 代码编写
为什么使用面向对象
Java面向对象版本的吃货联盟订餐系统：
因为基础版本都在一个类中实现的功能，太过于麻烦，不清楚
，所以说我们利用面向对象制作吃货联盟订餐系统。
使用面向对象制作的优点：
1.更加具体化，把具体的事物抽象成类
2.易于理解，方便编写代码
3.安全性较高，经过封装代码后安全性提高
4.后期便于维护
划分类
我们进入代码编写，面向对象显著的特点就是将一个事物划分成为一类事物，从而更便捷的编写，我们思考：
首先要有订单，订单中有顾客的信息，那么我们将顾客的信息放在订单类中，顾客可以操作订餐等功能。
其次应该有餐厅，餐厅中由许多食物，我们继续划分
大概分为2类，菜品和饮品，那么我们抽象出具体的父类，菜品和饮品都在菜单上展示，所以，我们将菜单定为父类。
代码编写
菜单类：
package com.oop.demo;
public abstract class Menu {
public abstract void show();//打印供选择的菜品/饮品信息
public abstract void add(int index, int num);//添加菜品/饮品
public abstract void check();//打印选择的菜品/饮品信息
}菜品类（继承于菜单类）：
package com.oop.demo;
/**
* 菜品类，继承于菜单类
*
*/
public class Cuisine extends Menu{
/*菜品名称*/
private String[] cuisine_Names = {"鱼香肉丝", "宫保鸡丁", "糖醋里脊", "糖醋排骨", "小鸡炖蘑菇", "红烧鱼"};
/*菜品单价*/
private double[] cuisine_Prices = {29, 30, 40, 45, 50, 60};
/*选择菜品的名称*/
private String[] choice_Cui_Names = new String[cuisine_Names.length];
/*选择菜品的单价*/
private double[] choice_Cui_Prices = new double[cuisine_Prices.length];
/*选择菜品的份数*/
private int[] num = new int[choice_Cui_Names.length];
/**
* 打印供选择菜品的信息
*/
public void show() {
System.out.println("菜品序号\t菜品名称\t菜品单价");
for (int i = 0; i < cuisine_Names.length; i++) {
System.out.println((i + 1) + "\t" + cuisine_Names[i]
+ "\t" + cuisine_Prices[i]);
}
}
/**
* 添加菜品
*/
public void add(int index, int num) {
for (int i = 0; i < choice_Cui_Names.length; i++) {
if (choice_Cui_Names[i] == null) {
choice_Cui_Names[i] = cuisine_Names[index - 1];
choice_Cui_Prices[i] = cuisine_Prices[index - 1];
this.num[i] = num;
break;
}
}
}
/**
* 打印选择的菜品信息
*/
public void check() {
for (int i = 0; i < choice_Cui_Names.length; i++) {
if (choice_Cui_Names[i] != null) {
System.out.print("\t" + choice_Cui_Names[i]
+ "\t￥" + choice_Cui_Prices[i] + "\t " + num[i]);
}
}
}
}饮品类（继承于菜单类）：
package com.oop.demo;
/**
* 饮品类，继承于菜单类
*
*/
public class Beverage extends Menu{
/*饮料名称*/
private String[] beverage_Names = {"冰茶", "红茶", "绿茶", "蜜雪冰城", "矿泉水", "牛奶"};
/*饮料单价*/
private double[] beverage_Prices = {1.5, 2.5, 2.5, 10.0, 9.0, 12.0};
/*选择的饮品名称*/
private String[] choice_Bvg_Names = new String[beverage_Names.length];
/*选择的饮品单价*/
private double[] choice_Bvg_Prices = {beverage_Prices.length};
/*选择的饮品份数*/
private int[] num = new int[choice_Bvg_Names.length];
/**
* 打印供选择饮品的信息
*/
public void show() {
System.out.println("菜单如下：");
System.out.println("饮品序号\t饮品名称\t饮品单价");
for (int i = 0; i < beverage_Names.length; i++) {
System.out.println((i + 1) + "\t" + beverage_Names[i] + "\t￥"
+ beverage_Prices[i]);
}
}
/**
* 添加饮品
*/
public void add(int index, int num) {
for (int i = 0; i < choice_Bvg_Names.length; i++) {
if (choice_Bvg_Names[i] == null) {
choice_Bvg_Names[i] = beverage_Names[index - 1];
choice_Bvg_Prices[i] = beverage_Prices[index - 1];
this.num[i] = num;
break;
}
}
}
/**
* 打印选择的饮品信息
*/
public void check() {
for (int i = 0; i < choice_Bvg_Names.length; i++) {
if (choice_Bvg_Names[i] != null) {
System.out.print("\t" + choice_Bvg_Names[i]
+ "\t￥" + choice_Bvg_Prices[i] + "\t " + num[i]);
}
}
}
}订单类：
package com.oop.demo;
public class OrderForm {
private String name;//顾客昵称
private String tel;//顾客电话
private String addr;//顾客地址
Menu[] menu = new Menu[3];//初始化5个菜单信息
int[] states = new int[3];//订单状态
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getTel() {
return tel;
}
public void setTel(String tel) {
this.tel = tel;
}
public String getAddr() {
return addr;
}
public void setAddr(String addr) {
this.addr = addr;
}
}顾客类：
package com.oop.demo;
import java.util.Scanner;
/**
* 顾客类
*
*/
public class Customer {
Scanner sca = new Scanner(System.in);
OrderForm order_Form;
/**
* 修改信息
* @param name 昵称
* @param tel 电话号码
* @param addr 地址
*/
public void modify() {
if (order_Form.getName() == null) {
System.out.println("您还没有注册信息！");
} else {
System.out.println("请输入您的旧昵称：");
String name = sca.next();
System.out.println("请输入您的旧电话号码：");
String tel = sca.next();
System.out.println("请输入您的旧送餐地址：");
String addr = sca.next();
if (order_Form.getName().equals(name) && order_Form.getTel()
.equals(tel) && order_Form.getAddr().equals(addr)) {
System.out.println("请输入新的昵称：");
order_Form.setName(sca.next());
System.out.println("请输入新的电话号码：");
order_Form.setTel(sca.next());
System.out.println("请输入新的送餐地址：");
order_Form.setAddr(sca.next());
System.out.println("修改成功~");
} else {
System.out.println("输入信息于原有信息不符，修改失败！");
}
}
}
/**
* 删除订单
*/
public void del() {
get();
if (order_Form.menu[0] != null) {
System.out.println("请输入要删除的订单序号：");
int num = sca.nextInt();
if (order_Form.states[num - 1] == 0) {
System.out.println("您选择的订单未签收，不可删除！");
} else {
for (int i = num - 1; i < this.order_Form.menu.length - 1; i++) {
this.order_Form.menu[i] = this.order_Form.menu[i + 1];
this.order_Form.states[i + 1] = this.order_Form.states[num - 1];
}
this.order_Form.menu[num - 1] = null;
System.out.println("删除成功~");
}
}
}
/**
* 签收订单
*/
public void signFor() {
get();
if (order_Form.menu[0] != null) {
System.out.println("请输入要签收的订单序号：");
int num = sca.nextInt();
if (order_Form.states[num - 1] == 0) {
order_Form.states[num - 1] = 1;
System.out.println("签收成功~");
} else if (order_Form.states[num - 1] == 1) {
System.out.println("订单已签收无需重复签收！");
}
}
}
/**
* 查看订单信息
*/
public void get() {
int count = 0;
if (order_Form.getName() != null) {
System.out.println("订单人：" + order_Form.getName()
+ "\n送餐电话：" + order_Form.getTel()
+ "\n送餐地址：" + order_Form.getAddr());
}
if (order_Form.menu[0] != null) {
System.out.println("订单序号\t所点食品\t食品价格\t所点数量\t订单状态");
}
for (int i = 0; i < order_Form.menu.length; i++) {
if (order_Form.menu[i] != null) {
System.out.print(" " + (i + 1));
order_Form.menu[i].check();
if (order_Form.states[i] == 0) {
System.out.println("\t 待签收");
} else {
System.out.println("\t 已签收");
}
count ++;
}
}
if (count == 0) {
System.out.println("您没有任何订单记录！");
}
}
/**
* 点餐方法
*/
public void order(OrderForm orderForm) {
if (order_Form.getName() == null) {
System.out.println("请输入您的昵称：");
order_Form.setName(sca.next());
}
if (order_Form.getTel() == null) {
System.out.println("请输入您的电话号码：");
order_Form.setTel(sca.next());
}
if (order_Form.getAddr() == null) {
System.out.println("请输入您的地址：");
order_Form.setAddr(sca.next());
}
if (orderForm.menu[orderForm.menu.length - 1] != null) {
System.out.println("存储空间已满，无法存储！");
} else {
String choice = "";
Menu menu = null;
do {
System.out.println("请选择您想要点的食品类型（1.菜品 2.饮品）");
choice = sca.next();
if (choice.equals("1")) {
menu = new Cuisine();
} else if (choice.equals("2")) {
menu = new Beverage();
} else {
System.out.println("您的输入有误，请您重新输入：");
}
} while(!(choice.equals("1") || choice.equals("2")));
menu.show();
System.out.println("请根据编号选择食品：");
int food = sca.nextInt();
System.out.println("请输入要点餐的份数：");
int num = sca.nextInt();
menu.add(food, num);
for (int i = 0; i < this.order_Form.menu.length; i++) {
if (this.order_Form.menu[i] == null) {
this.order_Form.menu[i] = menu;
System.out.println("订餐成功~");
break;
}
}
}
}
}测试类：
package com.oop.demo;
import java.util.Scanner;
/**
* 测试类
*
*/
public class Test {
public static void main(String[] args) {
Scanner sca = new Scanner(System.in);
Customer customer = new Customer();
customer.order_Form = new OrderForm();
System.err.println("欢迎使用吃货联盟订餐系统");
boolean isExit = false;// true：退出系统
do {
System.out.println("\n************************\n"
+ "1.我要订餐\n"
+ "2.查看餐袋\n"
+ "3.签收订单\n"
+ "4.删除订单\n"
+ "5.修改信息\n"
+ "6.退出系统\n"
+ "************************\n"
+ "请根据序号进行选择：");
switch(sca.next()) {
case "1":
System.out.println("***我要订餐***");
customer.order(customer.order_Form);
break;
case "2":
System.out.println("***查看餐袋***");
customer.get();
break;
case "3":
System.out.println("***签收订单***");
customer.signFor();
break;
case "4":
System.out.println("***删除订单***");
customer.del();
break;
case "5":
System.out.println("***修改订单***");
customer.modify();
break;
case "6":
System.err.println("确定退出吗？（1；退出 2.继续）");
if (sca.next().equals("1")) {
isExit = true;
}
break;
default:
System.out.println("您的输入有误，请您重新输入：");
}
} while (!isExit);
if (isExit) {
System.out.println("感谢使用，再见！");
}
sca.close();
}
}ok,到此结束！
如有我未发现的bug，望各位大佬留言再评论区，双手感谢！！！????
