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傻瓜式外卖点餐零碎 ——(无数据库)
tips：
- 菜品类(菜品 id，菜品名，菜品类型，上架工夫，单价，月销售，总数量)
- 管理员类(管理员 id，账号，明码)
- 客户类(客户 id，客户名，性别，明码，送餐地址，手机号，创立工夫)
- 订单类 (订单号，订单创立工夫，菜品 id，购买数，客户 id，总价格，订单状态)
阐明：
- 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 …
- 菜品上架工夫、客户创立工夫、订单创立工夫依据增加工夫主动调配零碎工夫
- 订单状态类型为 int（0: 未领取 1：已领取 2：配送中 3：已实现）
要求实现如下性能： - 实现不同角色用户登录零碎
(1) 管理员登录零碎看到如下菜单：
① 增加菜品
② 查看所有菜品信息(蕴含分页性能)
③ 查看指定类别的菜品信息
④ 依据菜品 id 批改菜品价格
⑤ 删除指定 id 的菜品
⑥ 增加客户
⑦ 查看客户列表
⑧ 删除指定 id 的客户
⑨ 订单列表显示
⑩ 依据订单 id 批改订单状态
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入)
——–> 点餐（输出菜品 id 和购买数量）
② 依据菜品类别显示所有菜品
③ 查看所有订单(以后登录用户的)
④ 批改明码（以后登录用户的）
⑤ 个人信息显示
以上就是全副要求，首先咱们能够先建一个接口，不便对四个治理类进行操作；
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、再依据要求，先把四个类的属性类建设起来：
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 + ", 上架工夫：" + 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，间接把每一个属性都设置一下，而后设置为公有，留神属性的数据类型 ，这个很重要，不便前期治理类对其进行操作。
二、属性治理类
这个是整个 demo 比拟难得中央，我的想法是建设 Admin 属性治理类，Order 属性治理类，Dishes 属性类，User 属性治理类，再在 Admin 属性治理类里把 Order 属性治理类，Dishes 属性类，User 属性治理类先 new 进去，而后，每个属性治理类实现各自的办法，只须要在 Admin 属性治理类中调用各个属性治理类的办法，就能够实现通过 Admin 类治理其余类的数据，然而，每个类须要建一个 Map 汇合，存储各自的元素，此处应该留神每个属性治理类 Map 的键 不便前期对 Map 进行操作，而后建设菜单类，规定 User 和 Admin 能调用的办法。
话不多说，间接上代码，一下代码是通过 Admin 治理类延长的，所以先看 Admin 治理类。
1.Admin 治理类
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);
/**
* 增加菜品
*/
public void addDishes() {System.out.println("请输入您要增加的菜品:(依照: 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，输出失败啦，请从新输出！");
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, 祝贺你！增加胜利了");
}
}
/**
* 查看所有菜品信息(蕴含分页性能)
*/
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("请输入您要查问菜品的类别：");
String typename = sc.next();
d.selectBytype(typename);
}
/**
* 依据菜品 id 批改菜品价格
*/
public void selectByDishesID() {System.out.println("请输入您要查问的菜品 id：");
String id = sc.next();
Dishes dish = d.findById(id);
if (dish == null) {System.out.println("没有以后 id 的菜品呢");
} else {System.out.println("以后菜品为：" + dish);
System.out.println("请输出新的菜品单价：");
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("批改胜利" + 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("删除胜利！！");
}
/**
* 增加客户
*/
public void addUser() {System.out.println("请输入您要增加的用户: 依照(id/ 姓名 / 性别 / 明码 / 送餐地址 / 手机号)");
String str = sc.next();
String[] info = str.split("/");
if (info.length < 6) {System.out.println("您输出的信息有误，请从新输出....");
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("增加胜利");
}
}
/**
* 查看客户列表
*/
public void findUser() {List<User> userlist = u.findAll();
for (User user : userlist) {System.out.println(user);
}
}
/**
* 依据 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);
}
}
/**
* 依据订单 id 批改订单状态
*/
public void changeOrderValue() {System.out.println("请输入您要批改状态的订单 id");
String id = sc.next();
Order order = o.findById(id);
if (order == null) {System.out.println("没有以后 id 的订单，请查看输出");
} else {System.out.println("已找到以后 id 订单" + order);
System.out.println("请输入您要批改的状态：0: 未领取 1：已领取 2：配送中 3：已实现");
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("批改胜利了！！！");
}
}
/**
* 显示所有菜品(按菜品销量从高到低排序输入)
*/
public void showAllDishesByUser() {List<Dishes> list = d.findAll();
Collections.sort(list, (p1, p2) -> p1.getDsales() - p2.getDsales());
System.out.println(list);
}
/**
* 点餐（输出菜品 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：依照(id/ 数量)");
String str = sc.next();
String[] info = str.split("/");
// 判断输出是否符合要求，不合乎则要求从新输出
if (info.length < 2) {System.out.println("输出有误，请从新输出：");
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]));
}
}
/**
* 依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(以后登录用户的)
*/
public void showAllOrderByUser(User user) {List<Order> list = o.findByuId(user.getuID());
for (Order order : list) {System.out.println(order);
}
}
/**
* 批改明码（以后登录用户的）*/
public void changePwdByUser(User user) {u.changepwd(user.getuID());
System.out.println("批改胜利！！");
}
/**
* 个人信息显示
*/
public void showByUser(User user) {User findById = u.findById(user.getuID());
System.out.println(findById);
}
// 待补充性能，删除管理员
@Override
public void delete(String id) { }
// 待补充性能，增加管理员
@Override
public void insert(Admin t) {// TODO Auto-generated method stub}
// 待补充性能，通过 id 即账号查找管理员
@Override
public Admin findById(String id) {return map.get(id);
}
// 待补充性能，显示所有管理员
@Override
public List<Admin> findAll() {
// TODO Auto-generated method stub
return null;
}
// 先设置零碎默认数据
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 属性治理类
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 查问用户的所有订单，并返回一个 list 汇合
* @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;
}
/**
* 待实现性能，删除订单
*/
@Override
public void delete(String id) {// TODO Auto-generated method stub}
}
3.User 属性治理类
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，明码，送餐地址，手机号，创立工夫
public class UserSys implements DAO<User> {static Map<String, User> usermap = new HashMap<>();
List<User> list = new ArrayList<>();
Scanner sc = new Scanner(System.in);
/**
* 增加客户
*/
@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("没有以后 id 的客户");
} else {System.out.println(usermap.get(id) + "已删除！！！");
usermap.remove(id);
}
}
/**
* 批改明码（以后登录用户的）*/
public void changepwd(String id) {User user = findById(id);
System.out.println("请输出新密码：");
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 属性治理类
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> {
// 建设一个菜品的 map 汇合，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();
/**
* 增加菜品
*/
@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);
}
}
/**
* 依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;
}
/**
* 查问所有菜品
*/
@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("没有以后类别的菜品！");
}
}
/**
* 删除指定 id 菜品
*/
@Override
public void delete(String id) {if (dishesmap.get(id) == null) {System.out.println("输出 id 谬误...");
} else {dishesmap.remove(id);
}
}
}
以上根本就是代码的外围局部，剩下的局部就简化很多了，建设一个菜单类，别离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("请输出账号和明码：依照(账号 / 明码)");
String str = sc.next();
String[] info = str.split("/");
if (info.length < 2) {System.out.println("输出有误，请从新输出：");
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("输出有误，请从新输出....");
showMenu();}
}
}
public void userMenu(User user) {System.out.println("========= 欢送来到订餐零碎 =======");
System.out.println("====【1】点餐 =================");
System.out.println("====【2】依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】批改明码 ===============");
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("谢谢应用，再见！");
System.exit(0);
default:
System.out.println("输出谬误，请从新输出：");
userMenu(user);
}
}
public void adminMenu() {System.out.println("========= 欢迎您尊贵的管理员 =======");
System.out.println("====【1】增加菜品 ===============");
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】依据菜品 id 批改菜品价格 =====");
System.out.println("====【5】删除指定 id 的菜品 =========");
System.out.println("====【6】增加客户 ================");
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】依据订单 id 批改订单状态 ====");
System.out.println("====【11】退出 =================");
String m = sc.next();
switch (m) {
case "1":
admin.addDishes();
adminMenu();
break;
case "2":
System.out.println("请输入您须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("谢谢应用，再见！");
System.exit(0);
break;
default:
System.out.println("输出谬误，请从新输出：");
adminMenu();}
}
}
这里 switch 采取 String（jdk1.7 当前才反对）能够让用户就算输出谬误也不会报错导致程序运行终止，又要从新输出（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、实现局部界面截图
以上就是全副代码。
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