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【项目实战】太强大了,Java外卖点餐初级系统【附源码】

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:
  1. 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 …

  2. 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

  3. 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:

  4. 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);
}

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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 + "]";
	}

}

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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 + "]";
	}

}

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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 + "]";
	}

}

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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 + "]";
	}

}

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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);
	}

}

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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

	}
}

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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);
		}

	}

}

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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);
		}

	}
}

复制代码

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();
		}
	}
}

复制代码

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();
	}
}

复制代码

五、实现部分界面截图 在这里插入图片描述

在这里插入图片描述

在这里插入图片描述

在这里插入图片描述

在这里插入图片描述

在这里插入图片描述

在这里插入图片描述

在这里插入图片描述

以上就是全部代码。

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