傻瓜式外卖点餐系统------(无数据库)
tips：
- 菜品类(菜品id，菜品名，菜品类型，上架时间，单价，月销售，总数量)
- 管理员类(管理员id，账号，密码)
- 客户类(客户id，客户名，性别，密码，送餐地址，手机号，创建时间)
- 订单类(订单号，订单创建时间，菜品id，购买数，客户id，总价格，订单状态)
说明：
- 菜品类型可自行设计数据类型(int或String)，如1：面食 2：米饭 3：湘菜 …
- 菜品上架时间、客户创建时间、订单创建时间根据添加时间自动分配系统时间
- 订单状态类型为int（0:未支付 1：已支付 2：配送中 3：已完成）
要求实现如下功能：
- 实现不同角色用户登录系统
(1) 管理员登录系统看到如下菜单：
① 添加菜品
② 查看所有菜品信息(包含分页功能)
③ 查看指定类别的菜品信息
④ 根据菜品id修改菜品价格
⑤ 删除指定id的菜品
⑥ 添加客户
⑦ 查看客户列表
⑧ 删除指定id的客户
⑨ 订单列表显示
⑩ 根据订单id修改订单状态
11 退出
(2) 客户登录看到如下菜单：
① 显示所有菜品(按菜品销量从高到低排序输出)
-------->点餐（输入菜品id和购买数量）
② 根据菜品类别显示所有菜品
③ 查看所有订单(当前登录用户的)
④ 修改密码（当前登录用户的）
⑤ 个人信息显示
以上就是全部要求，首先咱们可以先建一个接口，方便对四个管理类进行操作；
package com.softeem.lesson23.test2;
import java.util.List;
public interface DAO<T> {
void insert(T t);
T findById(String id);
List<T> findAll();
void delete(String id);
}
一、再根据要求，先把四个类的属性类建立起来：
1.Admin类（管理员类）
package com.softeem.lesson23.test2;
public class Admin {
private String aID;
private String account;
private String apwd;
public Admin() {
// TODO Auto-generated constructor stub
}
public Admin(String aID, String account, String apwd) {
super();
this.aID = aID;
this.account = account;
this.apwd = apwd;
}
public String getaID() {
return aID;
}
public void setaID(String aID) {
this.aID = aID;
}
public String getAccount() {
return account;
}
public void setAccount(String account) {
this.account = account;
}
public String getApwd() {
return apwd;
}
public void setApwd(String apwd) {
this.apwd = apwd;
}
@Override
public String toString() {
return "Admin [aID=" + aID + ", account=" + account + ", apwd=" + apwd + "]";
}
}
2.Dishes类（菜品类）
package com.softeem.lesson23.test2;
import java.time.LocalDate;
public class Dishes {
private String dID;
private String dname;
private String dtype;
private LocalDate dtime;
private double price;
private int dsales;
private int dstocks;
public Dishes() {
// TODO Auto-generated constructor stub
}
public Dishes(String dID, String dname, String dtype, LocalDate dtime, double price, int dsales, int dstocks) {
super();
this.dID = dID;
this.dname = dname;
this.dtype = dtype;
this.dtime = dtime;
this.price = price;
this.dsales = dsales;
this.dstocks = dstocks;
}
public String getdID() {
return dID;
}
public void setdID(String dID) {
this.dID = dID;
}
public String getDname() {
return dname;
}
public void setDname(String dname) {
this.dname = dname;
}
public String getDtype() {
return dtype;
}
public void setDtype(String dtype) {
this.dtype = dtype;
}
public LocalDate getDtime() {
return dtime;
}
public void setDtime(LocalDate dtime) {
this.dtime = dtime;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public int getDsales() {
return dsales;
}
public void setDsales(int dsales) {
this.dsales = dsales;
}
public int getDstocks() {
return dstocks;
}
public void setDstocks(int dstocks) {
this.dstocks = dstocks;
}
@Override
public String toString() {
return "Dishes [菜品id：" + dID + ", 菜品名：" + dname + ", 菜品类型：" + dtype + ", 上架时间：" + dtime + ", 单价：" + price
+ ", 月销量：" + dsales + ", 总数量：" + dstocks + "]";
}
}
3.Order类（订单类）
package com.softeem.lesson23.test2;
import java.time.LocalDateTime;
public class Order {
private String OrderID;
private LocalDateTime utime;
private Dishes dishes;
private int Ordernum;
private String uID;
private Double Orderprice;
private int OrderValue;
public Order() {
// TODO Auto-generated constructor stub
}
public Order(String orderID, LocalDateTime utime, Dishes dishes, int ordernum, String uID, Double orderprice,
int orderValue) {
super();
OrderID = orderID;
this.utime = utime;
this.dishes = dishes;
Ordernum = ordernum;
this.uID = uID;
Orderprice = orderprice;
OrderValue = orderValue;
}
public String getOrderID() {
return OrderID;
}
public void setOrderID(String orderID) {
OrderID = orderID;
}
public LocalDateTime getUtime() {
return utime;
}
public void setUtime(LocalDateTime utime) {
this.utime = utime;
}
public Double getOrderprice() {
return Orderprice;
}
public void setOrderprice(Double orderprice) {
Orderprice = orderprice;
}
public Dishes getDishes() {
return dishes;
}
public void setDishes(Dishes dishes) {
this.dishes = dishes;
}
public int getOrdernum() {
return Ordernum;
}
public void setOrdernum(int ordernum) {
Ordernum = ordernum;
}
public String getuID() {
return uID;
}
public void setuID(String uID) {
this.uID = uID;
}
public int getOrderValue() {
return OrderValue;
}
public void setOrderValue(int orderValue) {
OrderValue = orderValue;
}
@Override
public String toString() {
return "Order [OrderID=" + OrderID + ", utime=" + utime + ", dishes=" + dishes + ", Ordernum=" + Ordernum
+ ", uID=" + uID + ", Orderprice=" + Orderprice + ", OrderValue=" + OrderValue + "]";
}
}
4.User类（用户类）
package com.softeem.lesson23.test2;
import java.time.LocalDateTime;
public class User {
private String uID;
private String uname;
private String usex;
private String upwd;
private String uadress;
private String utel;
private LocalDateTime utime;
public User() {
// TODO Auto-generated constructor stub
}
public User(String uID, String uname, String usex, String upwd, String uadress, String utel, LocalDateTime utime) {
super();
this.uID = uID;
this.uname = uname;
this.usex = usex;
this.upwd = upwd;
this.uadress = uadress;
this.utel = utel;
this.utime = utime;
}
public String getuID() {
return uID;
}
public void setuID(String uID) {
this.uID = uID;
}
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
public String getUsex() {
return usex;
}
public void setUsex(String usex) {
this.usex = usex;
}
public String getUpwd() {
return upwd;
}
public void setUpwd(String upwd) {
this.upwd = upwd;
}
public String getUadress() {
return uadress;
}
public void setUadress(String uadress) {
this.uadress = uadress;
}
public String getUtel() {
return utel;
}
public void setUtel(String utel) {
this.utel = utel;
}
public LocalDateTime getUtime() {
return utime;
}
public void setUtime(LocalDateTime utime) {
this.utime = utime;
}
@Override
public String toString() {
return "User [uID=" + uID + ", uname=" + uname + ", usex=" + usex + ", upwd=" + upwd + ", uadress=" + uadress
+ ", utel=" + utel + ", utime=" + utime + "]";
}
}
这一步没什么难度，直接把每一个属性都设置一下，然后设置为私有，注意属性的数据类型，这个很重要，方便后期管理类对其进行操作。
二、属性管理类
这个是整个demo比较难得地方，我的想法是建立Admin属性管理类，Order属性管理类，Dishes属性类，User属性管理类，再在Admin属性管理类里把Order属性管理类，Dishes属性类，User属性管理类先new出来，然后，每个属性管理类实现各自的方法，只需要在Admin属性管理类中调用各个属性管理类的方法，就可以实现通过Admin类管理其他类的数据，但是，每个类需要建一个Map集合，存储各自的元素，此处应该注意每个属性管理类Map的键方便后期对Map进行操作，然后建立菜单类，规定User和Admin能调用的方法。
话不多说，直接上代码，一下代码是通过Admin管理类延伸的，所以先看Admin管理类。
1.Admin管理类
package com.softeem.lesson23.test2;
import java.time.LocalDate;
import java.time.LocalDateTime;
//import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
//import java.util.Set;
public class AdminSys implements DAO<Admin> {
static Map<String, Admin> map = new HashMap<>();
// static Set<String> keys = map.keySet();
UserSys u = new UserSys();
OrderSys o = new OrderSys();
DishesSys d = new DishesSys();
Scanner sc = new Scanner(System.in);
/**
* 添加菜品
*/
public void addDishes() {
System.out.println("请输入您要添加的菜品:(按照:菜品ID/菜品名/菜品类型/单价/月销量/总数量)");
String str = sc.next();
String[] info = str.split("/");
//
if (info.length < 6) {
System.out.println("天啦撸，输入失败啦，请重新输入！");
addDishes();
} else {
LocalDate dtime = LocalDate.now();
Dishes t = new Dishes(info[0], info[1], info[2], dtime, Double.parseDouble(info[3]),
Integer.parseInt(info[4]), Integer.parseInt(info[5]));
d.insert(t);
System.out.println("小主,恭喜你！添加成功了");
}
}
/**
* 查看所有菜品信息(包含分页功能)
*/
public void showAllDishes(int pageSize) {
List<Dishes> list = d.findAll();
int start = 0;
//先写一个死循环，进入else后break掉
while (true) {
if (list.size() > (pageSize + start)) {
System.out.println(list.subList(start, pageSize + start));
} else {
System.out.println(list.subList(start, list.size()));
break;
}
start = start + pageSize;
}
}
/**
* 查看指定类别的菜品信息
*
*/
public void selecBytypeOfAdmin() {
System.out.println("请输入您要查询菜品的类别：");
String typename = sc.next();
d.selectBytype(typename);
}
/**
* 根据菜品id修改菜品价格
*/
public void selectByDishesID() {
System.out.println("请输入您要查询的菜品id：");
String id = sc.next();
Dishes dish = d.findById(id);
if (dish == null) {
System.out.println("没有当前id的菜品呢");
} else {
System.out.println("当前菜品为：" + dish);
System.out.println("请输入新的菜品单价：");
double newprice = sc.nextDouble();
Dishes t = new Dishes(dish.getdID(), dish.getDname(), dish.getDtype(), dish.getDtime(), newprice,
dish.getDsales(), dish.getDstocks());
d.insert(t);
System.out.println("修改成功" + d.findById(t.getdID()));
}
}
/**
* 删除指定id的菜品
*
* @param args
*/
public void deleteDishes() {
System.out.println("请输入您要删除的菜品id");
String id = sc.next();
d.delete(id);
System.out.println("删除成功！！");
}
/**
* 添加客户
*/
public void addUser() {
System.out.println("请输入您要添加的用户:按照(id/姓名/性别/密码/送餐地址/手机号)");
String str = sc.next();
String[] info = str.split("/");
if (info.length < 6) {
System.out.println("您输入的信息有误，请重新输入....");
addUser();
} else {
LocalDateTime utime = LocalDateTime.now();
u.insert(new User(info[0], info[1], info[2], info[3], info[4], info[5], utime));
System.out.println("添加成功");
}
}
/**
* 查看客户列表
*/
public void findUser() {
List<User> userlist = u.findAll();
for (User user : userlist) {
System.out.println(user);
}
}
/**
* 根据id查找指定用户
*/
public User findUserByid(String id) {
return u.findById(id);
}
/**
* 删除指定id的客户
*/
public void deleteUserByAdmin() {
System.out.println("请输入您要删除的id：");
String id = sc.next();
u.delete(id);
}
/**
* 订单列表显示
*/
public void showAllOrder() {
List<Order> allOrder = o.findAll();
for (Order order : allOrder) {
System.out.println(order);
}
}
/**
* 根据订单id修改订单状态
*/
public void changeOrderValue() {
System.out.println("请输入您要修改状态的订单id");
String id = sc.next();
Order order = o.findById(id);
if (order == null) {
System.out.println("没有当前id的订单，请检查输入");
} else {
System.out.println("已找到当前id订单" + order);
System.out.println("请输入您要修改的状态：0:未支付 1：已支付 2：配送中 3：已完成");
int value = sc.nextInt();
Order t = new Order(order.getOrderID(), order.getUtime(), order.getDishes(), order.getOrdernum(),
order.getuID(), order.getOrderprice(), value);
o.insert(t);
System.out.println("修改成功了！！！");
}
}
/**
* 显示所有菜品(按菜品销量从高到低排序输出)
*/
public void showAllDishesByUser() {
List<Dishes> list = d.findAll();
Collections.sort(list, (p1, p2) -> p1.getDsales() - p2.getDsales());
System.out.println(list);
}
/**
* 点餐（输入菜品id和购买数量）
*/
public void shopDishes(User user) {
showAllDishesByUser();
System.out.println("请输入您要购买的id和数量：按照(id/数量)");
String str = sc.next();
String[] info = str.split("/");
// 判断输入是否符合要求，不符合则要求重新输入
if (info.length < 2) {
System.out.println("输入有误，请重新输入：");
shopDishes(user);
} else {
LocalDateTime l = LocalDateTime.now();
// String orderID, LocalDateTime utime, Dishes dishes, int ordernum, String uID,
// Double orderprice,int orderValue
Order t = new Order(info[0], l, d.findById(info[0]), Integer.parseInt(info[1]), user.getuID(),
o.findById(info[0]).getOrderprice(), o.findById(info[0]).getOrderValue());
o.insert(t);
System.out.println("订单已生成！！！" + o.findById(info[0]));
}
}
/**
* 根据菜品类别显示所有菜品
*/
public void ShowOfTypeByUser() {
System.out.println("请输入您要查找的类别：");
String str = sc.next();
System.out.println(d.findByType(str));
}
/**
* 查看所有订单(当前登录用户的)
*/
public void showAllOrderByUser(User user) {
List<Order> list = o.findByuId(user.getuID());
for (Order order : list) {
System.out.println(order);
}
}
/**
* 修改密码（当前登录用户的）
*/
public void changePwdByUser(User user) {
u.changepwd(user.getuID());
System.out.println("修改成功！！");
}
/**
* 个人信息显示
*/
public void showByUser(User user) {
User findById = u.findById(user.getuID());
System.out.println(findById);
}
//待补充功能，删除管理员
@Override
public void delete(String id) {
}
//待补充功能，添加管理员
@Override
public void insert(Admin t) {
// TODO Auto-generated method stub
}
//待补充功能，通过id即账号查找管理员
@Override
public Admin findById(String id) {
return map.get(id);
}
//待补充功能，显示所有管理员
@Override
public List<Admin> findAll() {
// TODO Auto-generated method stub
return null;
}
//先设置系统默认数据
public void addMessage() {
map.put("qwl", new Admin("10086", "qwl", "123456"));
LocalDate time = LocalDate.now();
Dishes d1 = new Dishes("1", "红烧猪蹄", "肉类", time, 12.5, 20, 30);
d.insert(d1);
Dishes d2 = new Dishes("2", "鸡公煲", "肉类", time, 21.5, 30, 20);
d.insert(d2);
Dishes d3 = new Dishes("3", "麻辣香锅", "火锅类", time, 30, 5, 10);
d.insert(d3);
Dishes d4 = new Dishes("4", "水煮肉片", "肉类", time, 15, 12, 15);
d.insert(d4);
Dishes d5 = new Dishes("5", "水果沙拉", "水果类", time, 6, 70, 60);
d.insert(d5);
// String orderID, LocalDateTime utime, Dishes dishes, int ordernum, String uID,
// Double orderprice,int orderValue
LocalDateTime localdatetime = LocalDateTime.now();
Order o1 = new Order("1", localdatetime, d1, 10, "1001", 60.0, 1);
o.insert(o1);
Order o2 = new Order("2", localdatetime, d2, 5, "1002", 50.0, 10);
o.insert(o2);
Order o3 = new Order("3", localdatetime, d3, 5, "1003", 40.0, 5);
o.insert(o3);
Order o4 = new Order("4", localdatetime, d4, 5, "1004", 30.0, 6);
o.insert(o4);
Order o5 = new Order("5", localdatetime, d5, 5, "1005", 20.0, 8);
o.insert(o5);
// String uID, String uname, String usex, String upwd, String uadress, String
// utel, LocalDateTime utime
User u1 = new User("1001", "张三", "男", "123456", "湖北", "13545286487", localdatetime);
u.insert(u1);
User u2 = new User("1002", "李四", "男", "234567", "湖南", "15927948976", localdatetime);
u.insert(u2);
User u3 = new User("1003", "王五", "男", "345678", "江苏", "15927986854", localdatetime);
u.insert(u3);
User u4 = new User("1004", "刘柳", "女", "456789", "浙江", "18771580860", localdatetime);
u.insert(u4);
User u5 = new User("1005", "赵琦", "女", "567890", "新疆", "18771580750", localdatetime);
u.insert(u5);
}
}
2.Order属性管理类
package com.softeem.lesson23.test2;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
public class OrderSys implements DAO<Order> {
static Map<String, Order> ordermap = new HashMap<>();
static List<Order> orderlist = new ArrayList<>();
/**
* 新增订单
*/
@Override
public void insert(Order t) {
ordermap.put(t.getOrderID(), t);
}
/**
* 通过订单id查找订单
*/
@Override
public Order findById(String id) {
if (ordermap.get(id) == null) {
return null;
} else {
return ordermap.get(id);
}
}
/**
* 通过用户id查询用户的所有订单，并返回一个list集合
* @param uid
* @return
*/
public List<Order> findByuId(String uid) {
List<Order> list = new ArrayList<>();
Set<String> keys = ordermap.keySet();
for (String key : keys) {
if (Objects.equals(uid, ordermap.get(key).getuID())) {
list.add(ordermap.get(key));
}
}
return list;
}
/**
* 显示所有订单
*/
@Override
public List<Order> findAll() {
Set<String> keys = ordermap.keySet();
for (String key : keys) {
orderlist.add(ordermap.get(key));
}
return orderlist;
}
/**
* 待完成功能，删除订单
*/
@Override
public void delete(String id) {
// TODO Auto-generated method stub
}
}
3.User属性管理类
package com.softeem.lesson23.test2;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;
//客户id，客户名，性别，密码，送餐地址，手机号，创建时间
public class UserSys implements DAO<User> {
static Map<String, User> usermap = new HashMap<>();
List<User> list = new ArrayList<>();
Scanner sc = new Scanner(System.in);
/**
* 添加客户
*/
@Override
public void insert(User t) {
usermap.put(t.getuID(), t);
}
/**
* 查看客户列表
*/
@Override
public List<User> findAll() {
Set<String> keys = usermap.keySet();
for (String str : keys) {
list.add(usermap.get(str));
}
return list;
}
/**
* 删除指定id的客户
*/
@Override
public void delete(String id) {
if (usermap.get(id) == null) {
System.out.println("没有当前id的客户");
} else {
System.out.println(usermap.get(id) + "已删除！！！");
usermap.remove(id);
}
}
/**
* 修改密码（当前登录用户的）
*/
public void changepwd(String id) {
User user = findById(id);
System.out.println("请输入新密码：");
String str = sc.next();
User t = new User(user.getuID(), user.getUname(), user.getUsex(), str, user.getUadress(), user.getUtel(),
user.getUtime());
usermap.put(id, t);
}
/**
* 通过id查找对应客户
*/
@Override
public User findById(String id) {
if (usermap.get(id) == null) {
return null;
} else {
return usermap.get(id);
}
}
}
4.Dishes属性管理类
package com.softeem.lesson23.test2;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
public class DishesSys implements DAO<Dishes> {
// 建立一个菜品的map集合，其中菜品的id为map的键，整个菜品对象为map的值
static Map<String, Dishes> dishesmap = new HashMap<>();
Set<String> keys = dishesmap.keySet();
/**
* 添加菜品
*/
@Override
public void insert(Dishes t) {
dishesmap.put(t.getdID(), t);
}
/**
* 通过id来寻找菜品
*/
@Override
public Dishes findById(String id) {
if (dishesmap.get(id) == null) {
return null;
} else {
return dishesmap.get(id);
}
}
/**
* 根据菜品类型查找菜品
*/
public List<Dishes> findByType(String type) {
List<Dishes> list = new ArrayList<>();
for (String key : keys) {
if (Objects.equals(type, dishesmap.get(key).getDtype())) {
list.add(dishesmap.get(key));
}
}
return list;
}
/**
* 查询所有菜品
*/
@Override
public List<Dishes> findAll() {
List<Dishes> list = new ArrayList<>();
for (String str : keys) {
list.add(dishesmap.get(str));
}
return list;
}
public void selectBytype(String typename) {
int count = 0;
for (String key : keys) {
if (Objects.equals(dishesmap.get(key).getDtype(), typename)) {
System.out.println(dishesmap.get(key));
count++;
}
}
if (count == 0) {
System.out.println("没有当前类别的菜品！");
}
}
/**
* 删除指定id菜品
*/
@Override
public void delete(String id) {
if (dishesmap.get(id) == null) {
System.out.println("输入id错误...");
} else {
dishesmap.remove(id);
}
}
}
以上基本就是代码的核心部分，剩下的部分就简化很多了，建立一个菜单类，分别对其进行不同调用就行了
三、菜单类
package com.softeem.lesson23.test2;
import java.util.Objects;
import java.util.Scanner;
public class Menu {
static AdminSys admin = new AdminSys();
Scanner sc = new Scanner(System.in);
public void showMenu() {
admin.addMessage();
System.out.println("请输入账号和密码：按照(账号/密码)");
String str = sc.next();
String[] info = str.split("/");
if (info.length < 2) {
System.out.println("输入有误，请重新输入：");
showMenu();
} else {
if (admin.findById(info[0]) != null && Objects.equals(admin.findById(info[0]).getApwd(), info[1])) {
adminMenu();
} else if (admin.findUserByid(info[0]) != null
&& Objects.equals(info[1], admin.findUserByid(info[0]).getUpwd())) {
User user = admin.findUserByid(info[0]);
userMenu(user);
} else {
System.out.println("输入有误，请重新输入....");
showMenu();
}
}
}
public void userMenu(User user) {
System.out.println("=========欢迎来到订餐系统=======");
System.out.println("====【1】点餐=================");
System.out.println("====【2】根据菜品类别显示所有菜品===");
System.out.println("====【3】查看所有订单============");
System.out.println("====【4】修改密码===============");
System.out.println("====【5】个人信息显示============");
System.out.println("====【6】退出==================");
System.out.println("请输入您要进行的操作：");
String n = sc.next();
switch (n) {
case "1":
admin.shopDishes(user);
userMenu(user);
break;
case "2":
admin.ShowOfTypeByUser();
userMenu(user);
break;
case "3":
admin.showAllOrderByUser(user);
userMenu(user);
break;
case "4":
admin.changePwdByUser(user);
userMenu(user);
break;
case "5":
admin.showByUser(user);
userMenu(user);
break;
case "6":
System.out.println("谢谢使用，再见！");
System.exit(0);
default:
System.out.println("输入错误，请重新输入：");
userMenu(user);
}
}
public void adminMenu() {
System.out.println("=========欢迎您尊贵的管理员=======");
System.out.println("====【1】添加菜品===============");
System.out.println("====【2】查看所有菜品信息显示=======");
System.out.println("====【3】查看指定类别的菜品信息=====");
System.out.println("====【4】根据菜品id修改菜品价格=====");
System.out.println("====【5】删除指定id的菜品=========");
System.out.println("====【6】添加客户================");
System.out.println("====【7】查看客户列表=============");
System.out.println("====【8】删除指定id的用户==========");
System.out.println("====【9】订单列表显示=============");
System.out.println("====【10】根据订单id修改订单状态====");
System.out.println("====【11】退出=================");
String m = sc.next();
switch (m) {
case "1":
admin.addDishes();
adminMenu();
break;
case "2":
System.out.println("请输入您需要每行显示多少数据：");
int pageSize = sc.nextInt();
admin.showAllDishes(pageSize);
adminMenu();
break;
case "3":
admin.selecBytypeOfAdmin();
adminMenu();
break;
case "4":
admin.selectByDishesID();
adminMenu();
break;
case "5":
admin.deleteDishes();
adminMenu();
break;
case "6":
admin.addUser();
adminMenu();
break;
case "7":
admin.findUser();
adminMenu();
break;
case "8":
admin.deleteUserByAdmin();
adminMenu();
break;
case "9":
admin.showAllOrder();
adminMenu();
break;
case "10":
admin.changeOrderValue();
adminMenu();
break;
case "11":
System.out.println("谢谢使用，再见！");
System.exit(0);
break;
default:
System.out.println("输入错误，请重新输入：");
adminMenu();
}
}
}
这里switch采取String（jdk1.7以后才支持）可以让用户就算输入错误也不会报错导致程序运行终止，又要重新输入（我摊牌了，就是懒）。
四、测试类
package com.softeem.lesson23.test2;
public class Test {
public static void main(String[] args) {
Menu m = new Menu();
m.showMenu();
}
}
五、实现部分界面截图
以上就是全部代码。
转载：https://blog.csdn.net/weixin_44219955/article/details/110260435
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