代码如下(示例):

菜品类

import java.util.Date;

public class Greens {
//	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)
	private String id;
	private String name;
	private String type;
	private Date appearTime;
	private double price;
	private int monthSell;
	private int allCount;

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getType() {
		return type;
	}

	public void setType(String type) {
		this.type = type;
	}

	public Date getAppearTime() {
		return appearTime;
	}

	public void setAppearTime(Date appearTime) {
		this.appearTime = appearTime;
	}

	public double getPrice() {
		return price;
	}

	public void setPrice(double price) {
		this.price = price;
	}

	public int getMonthSell() {
		return monthSell;
	}

	public void setMonthSell(int monthSell) {
		this.monthSell = monthSell;
	}

	public int getAllCount() {
		return allCount;
	}

	public void setAllCount(int allCount) {
		this.allCount = allCount;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + allCount;
		result = prime * result + ((appearTime == null) ? 0 : appearTime.hashCode());
		result = prime * result + ((id == null) ? 0 : id.hashCode());
		result = prime * result + monthSell;
		result = prime * result + ((name == null) ? 0 : name.hashCode());
		long temp;
		temp = Double.doubleToLongBits(price);
		result = prime * result + (int) (temp ^ (temp >>> 32));
		result = prime * result + ((type == null) ? 0 : type.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Greens other = (Greens) obj;
		if (allCount != other.allCount)
			return false;
		if (appearTime == null) {
			if (other.appearTime != null)
				return false;
		} else if (!appearTime.equals(other.appearTime))
			return false;
		if (id == null) {
			if (other.id != null)
				return false;
		} else if (!id.equals(other.id))
			return false;
		if (monthSell != other.monthSell)
			return false;
		if (name == null) {
			if (other.name != null)
				return false;
		} else if (!name.equals(other.name))
			return false;
		if (Double.doubleToLongBits(price) != Double.doubleToLongBits(other.price))
			return false;
		if (type == null) {
			if (other.type != null)
				return false;
		} else if (!type.equals(other.type))
			return false;
		return true;
	}

	@Override
	public String toString() {
		return "Greens [id=" + id + ", name=" + name + ", type=" + type + ", appearTime=" + appearTime + ", price="
				+ price + ", monthSell=" + monthSell + ", allCount=" + allCount + "]";
	}

	public Greens(String id, String name, String type, Date appearTime, double price, int monthSell, int allCount) {
		super();
		this.id = id;
		this.name = name;
		this.type = type;
		this.appearTime = appearTime;
		this.price = price;
		this.monthSell = monthSell;
		this.allCount = allCount;
	}

	public Greens() {
		super();
	}

}

顾客类

import java.util.Date;

public class Customer {

//	客户类(客户id,客户名,性别,密码,送餐地址,手机号,创建时间)
	private String id;
	private String name;
	private String sex;
	private String password;
	private String address;
	private String phoneNumber;
	private Date setTime;

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getSex() {
		return sex;
	}

	public void setSex(String sex) {
		this.sex = sex;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public String getAddress() {
		return address;
	}

	public void setAddress(String address) {
		this.address = address;
	}

	public String getPhoneNumber() {
		return phoneNumber;
	}

	public void setPhoneNumber(String phoneNumber) {
		this.phoneNumber = phoneNumber;
	}

	public Date getSetTime() {
		return setTime;
	}

	public void setSetTime(Date setTime) {
		this.setTime = setTime;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((address == null) ? 0 : address.hashCode());
		result = prime * result + ((id == null) ? 0 : id.hashCode());
		result = prime * result + ((name == null) ? 0 : name.hashCode());
		result = prime * result + ((password == null) ? 0 : password.hashCode());
		result = prime * result + ((phoneNumber == null) ? 0 : phoneNumber.hashCode());
		result = prime * result + ((setTime == null) ? 0 : setTime.hashCode());
		result = prime * result + ((sex == null) ? 0 : sex.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Customer other = (Customer) obj;
		if (address == null) {
			if (other.address != null)
				return false;
		} else if (!address.equals(other.address))
			return false;
		if (id == null) {
			if (other.id != null)
				return false;
		} else if (!id.equals(other.id))
			return false;
		if (name == null) {
			if (other.name != null)
				return false;
		} else if (!name.equals(other.name))
			return false;
		if (password == null) {
			if (other.password != null)
				return false;
		} else if (!password.equals(other.password))
			return false;
		if (phoneNumber == null) {
			if (other.phoneNumber != null)
				return false;
		} else if (!phoneNumber.equals(other.phoneNumber))
			return false;
		if (setTime == null) {
			if (other.setTime != null)
				return false;
		} else if (!setTime.equals(other.setTime))
			return false;
		if (sex == null) {
			if (other.sex != null)
				return false;
		} else if (!sex.equals(other.sex))
			return false;
		return true;
	}

	@Override
	public String toString() {
		return "Customer [id=" + id + ", name=" + name + ", sex=" + sex + ", password=" + password + ", address="
				+ address + ", phoneNumber=" + phoneNumber + ", setTime=" + setTime + "]";
	}

	public Customer(String id, String name, String sex, String password, String address, String phoneNumber,
			Date setTime) {
		super();
		this.id = id;
		this.name = name;
		this.sex = sex;
		this.password = password;
		this.address = address;
		this.phoneNumber = phoneNumber;
		this.setTime = setTime;
	}

	public Customer() {
		super();
	}

}

订单类

import java.util.Date;

public class Indent {
//	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)
	private String indentNumber;
	private Date indentSetTime;
	private String greensId;
	private int buyNumber;
	private String customerId;
	private double allPrice;
	private int indentState;

	public String getIndentNumber() {
		return indentNumber;
	}

	public void setIndentNumber(String indentNumber) {
		this.indentNumber = indentNumber;
	}

	public Date getIndentSetTime() {
		return indentSetTime;
	}

	public void setIndentSetTime(Date indentSetTime) {
		this.indentSetTime = indentSetTime;
	}

	public String getGreensId() {
		return greensId;
	}

	public void setGreensId(String greensId) {
		this.greensId = greensId;
	}

	public int getBuyNumber() {
		return buyNumber;
	}

	public void setBuyNumber(int buyNumber) {
		this.buyNumber = buyNumber;
	}

	public String getCustomerId() {
		return customerId;
	}

	public void setCustomerId(String customerId) {
		this.customerId = customerId;
	}

	public double getAllPrice() {
		return allPrice;
	}

	public void setAllPrice(double allPrice) {
		this.allPrice = allPrice;
	}

	public int getIndentState() {
		return indentState;
	}

	public void setIndentState(int indentState) {
		this.indentState = indentState;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		long temp;
		temp = Double.doubleToLongBits(allPrice);
		result = prime * result + (int) (temp ^ (temp >>> 32));
		result = prime * result + buyNumber;
		result = prime * result + ((customerId == null) ? 0 : customerId.hashCode());
		result = prime * result + ((greensId == null) ? 0 : greensId.hashCode());
		result = prime * result + ((indentNumber == null) ? 0 : indentNumber.hashCode());
		result = prime * result + ((indentSetTime == null) ? 0 : indentSetTime.hashCode());
		result = prime * result + indentState;
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Indent other = (Indent) obj;
		if (Double.doubleToLongBits(allPrice) != Double.doubleToLongBits(other.allPrice))
			return false;
		if (buyNumber != other.buyNumber)
			return false;
		if (customerId == null) {
			if (other.customerId != null)
				return false;
		} else if (!customerId.equals(other.customerId))
			return false;
		if (greensId == null) {
			if (other.greensId != null)
				return false;
		} else if (!greensId.equals(other.greensId))
			return false;
		if (indentNumber == null) {
			if (other.indentNumber != null)
				return false;
		} else if (!indentNumber.equals(other.indentNumber))
			return false;
		if (indentSetTime == null) {
			if (other.indentSetTime != null)
				return false;
		} else if (!indentSetTime.equals(other.indentSetTime))
			return false;
		if (indentState != other.indentState)
			return false;
		return true;
	}

	@Override
	public String toString() {
		return "Indent [indentNumber=" + indentNumber + ", indentSetTime=" + indentSetTime + ", greensId=" + greensId
				+ ", buyNumber=" + buyNumber + ", customerId=" + customerId + ", allPrice=" + allPrice
				+ ", indentState=" + indentState + "]";
	}

	public Indent(String indentNumber, Date indentSetTime, String greensId, int buyNumber, String customerId,
			double allPrice, int indentState) {
		super();
		this.indentNumber = indentNumber;
		this.indentSetTime = indentSetTime;
		this.greensId = greensId;
		this.buyNumber = buyNumber;
		this.customerId = customerId;
		this.allPrice = allPrice;
		this.indentState = indentState;
	}

	public Indent() {
		super();
	}

}

管理员类

public class Manager {

//	管理员类(管理员id,账号,密码)
	private String id;
	private String idName;
	private String password;

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getIdName() {
		return idName;
	}

	public void setIdName(String idName) {
		this.idName = idName;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((id == null) ? 0 : id.hashCode());
		result = prime * result + ((idName == null) ? 0 : idName.hashCode());
		result = prime * result + ((password == null) ? 0 : password.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Manager other = (Manager) obj;
		if (id == null) {
			if (other.id != null)
				return false;
		} else if (!id.equals(other.id))
			return false;
		if (idName == null) {
			if (other.idName != null)
				return false;
		} else if (!idName.equals(other.idName))
			return false;
		if (password == null) {
			if (other.password != null)
				return false;
		} else if (!password.equals(other.password))
			return false;
		return true;
	}

	@Override
	public String toString() {
		return "Manager [id=" + id + ", idName=" + idName + ", password=" + password + "]";
	}

	public Manager(String id, String idName, String password) {
		super();
		this.id = id;
		this.idName = idName;
		this.password = password;
	}

	public Manager() {
		super();
	}

}

顾客购买类

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Random;
import java.util.Scanner;

public class CustomerBuy {

	List<Greens> listcb = new ArrayList();
	List<Indent> listcbI = new ArrayList();
	ManagerGreens mg = new ManagerGreens();
	{
		mg.adds();
	}

	// 1.显示所有菜品
	public List<Greens> showAll() {
		mg.findAll().sort((g1, g2) -> g2.getMonthSell() - g1.getMonthSell());
		return mg.findAll();
	}

	// 1-1.点餐
	public boolean BuyGreens(String id, int num, Customer cnow) {
		double allprice = 0;
		for (Greens G : mg.findAll()) {
			if (G.getId().equals(id)) {
				allprice = G.getPrice() * num;
			}
		}
		listcbI.add(new Indent(getIndentNumber(), getTime(), id, num, cnow.getId(), allprice, 1));
		listcbI.forEach(System.out::println);
		return true;

	}

	// 2.根据菜品类别显示所有菜品
	public List<Greens> showGreens(String type) {
		for (Greens G : mg.findAll()) {
			if (G.getType().equals(type)) {
				listcb.add(G);
			}
		}
		listcb.forEach(System.out::println);
		return listcb;

	}

	// 3.查看所有订单(当前用户)
	public List<Indent> showIndent() {
		listcbI.forEach(System.out::println);
		return listcbI;
	}

	// 4.修改密码
	public boolean changpas(Customer cnow, String nowpas) {

		cnow.setPassword(nowpas);
		System.out.println("修改成功");
		return true;

	}

	// 5.个人信息显示
	public Customer showself(Customer cnow) {

		System.out.println(cnow);
		return cnow;
	}

	// 随机生成8位订单号
	public String getIndentNumber() {
		Random r = new Random();
		String s = "";
		for (int i = 0; i < 8; i++) {
			int j = r.nextInt(10);
			s = s + j;
		}
		return s;
	}

	// 获取当前时间
	public Date getTime() {
		Date date = new Date(System.currentTimeMillis());
		return date;

	}

	// 顾客界面
	static public void CustomerInterface() {
		System.out.println("1.显示所有菜品(按菜品销量从高到低排序输出)");
		System.out.println("2.点餐(输入菜品id和购买数量)");
		System.out.println("3.根据菜品类别显示所有菜品");
		System.out.println("4.查看所有订单(当前登录用户的)");
		System.out.println("5.修改密码");
		System.out.println("6.个人信息显示");
		System.out.println("7.退出");

	}

	static void exit() {
		System.out.println("退出成功");
		System.exit(0);
	}

}

接口类

import java.util.List;

public interface DAO<T> {
//	添加T类型对象到Map中
	public void insert(T t)	;
//	根据id获取Map中的元素
	public T findById(String id);
//	返回map中的所有元素值集
	public List<T> findAll();  
//	根据id删除Map中的元素
	public void delete(String id); 

}

管理顾客类

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Scanner;

public class ManagerCustomer implements DAO<Customer> {
   
	// 添加list用来存放顾客的信息
	List<Customer> listc = new ArrayList();
	//添加一部分顾客
	{
		adds();
	}
	public void adds() {
		listc.add(new Customer("1","softeem","男","123456","softeem大楼","123456789",new Date(System.currentTimeMillis())));
		listc.add(new Customer("2","softeem1","女","123456","softeem大楼","123456789",new Date(System.currentTimeMillis())));
		listc.add(new Customer("3","softeem2","男","123456","softeem大楼","123456789",new Date(System.currentTimeMillis())));
		listc.add(new Customer("4","softeem3","女","123456","softeem大楼","123456789",new Date(System.currentTimeMillis())));
		listc.add(new Customer("5","softeem4","男","123456","softeem大楼","123456789",new Date(System.currentTimeMillis())));
		
	}

	// 6.添加顾客
	@Override
	public void insert(Customer c) {
		listc.add(c);
		System.out.println("添加成功");

	}

	// 7.查看客户列表
	@Override
	public List<Customer> findAll() {
		if (listc.size() != 0) {
			return listc;
		} else {
			return null;
		}
	}

	// 8.删除指定id的客户
	@Override
	public void delete(String id) {
		if(findById(id).getId()!=null) {
			listc.remove(findById(id));
			System.out.println("删除成功");
		}
		else {
			System.out.println("没有该用户");
		}
	}
	

//根据id找顾客
    @Override
    public Customer findById(String id) {
	    for(Customer c:listc) {
		if(c.getId().equals(id)) {
			return c;
		}
	}   
	return null;
}
   
  }

管理菜品类

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class ManagerGreens implements DAO<Greens> {
	// 创建一个集合用来存储菜品
	List<Greens> list = new ArrayList();

	public void adds() {
		// 先添加一部分菜品
		list.add(new Greens("1", "海鲜面", "面条", new Date(System.currentTimeMillis()), 15, 1000, 300));
		list.add(new Greens("2", "热干面", "面条", new Date(System.currentTimeMillis()), 5, 500, 260));
		list.add(new Greens("3", "卤肉面", "面条", new Date(System.currentTimeMillis()), 10, 500, 700));
		list.add(new Greens("4", "三线面", "面条", new Date(System.currentTimeMillis()), 8, 30, 4500));
		list.add(new Greens("11", "蛋炒饭", "饭", new Date(System.currentTimeMillis()), 9, 40, 1800));
		list.add(new Greens("12", "卤肉饭", "饭", new Date(System.currentTimeMillis()), 10, 60, 2300));
		list.add(new Greens("13", "叉烧饭", "饭", new Date(System.currentTimeMillis()), 12, 1000, 3400));
		list.add(new Greens("14", "海鲜饭", "饭", new Date(System.currentTimeMillis()), 13, 80, 22000));
		list.add(new Greens("21", "鲜肉水饺", "水饺", new Date(System.currentTimeMillis()), 17, 660, 2200));
		list.add(new Greens("22", "三鲜水饺", "水饺", new Date(System.currentTimeMillis()), 18, 340, 50));
		list.add(new Greens("23", "猪肉水饺", "水饺", new Date(System.currentTimeMillis()), 19, 1230, 60));
		list.add(new Greens("24", "白菜水饺", "水饺", new Date(System.currentTimeMillis()), 12, 130, 70));

	}

	// 1.添加菜品
	@Override
	public void insert(Greens g) {
		list.add(g);
		System.out.println("添加成功");
	}

	// 2.查看所有菜品(包含分页)
	@Override
	public List<Greens> findAll() {
		if (list.size() != 0) {
			return list;
		} else {
			return null;
		}
	}

	// 2.1分页
	public List<Greens> findByPage(int pageNow, int pageSize) {
		// 新建一个list
		List<Greens> list1 = new ArrayList();
		// 数据总长度
		int Alllength = list.size();
		// 一共多少页
		int page = 0;
		if (Alllength == 0) {
			System.out.println("没有菜品");
		} else {
			if (Alllength % pageSize != 0) {
				page = Alllength / pageSize + 1;
			} else if (Alllength % pageSize == 0) {
				page = Alllength / pageSize;
			} else if (Alllength < pageSize) {
				page = 1;
			}
		}
		if (page < pageNow) {
			return null;
		}
		// 取出菜品放到另一个数组中
		list1 = list.subList((pageNow - 1) * pageSize, pageNow * pageSize);

		return list1;

	}

	// 3.查看指定类别的菜品信息
	public List<Greens> findBytype(String type) {
		// 新建一个list集合来接收相同的菜品
		List list2 = new ArrayList();
		for (Greens G : list) {
			if (G.getType().equals(type)) {
				list2.add(G);
			}
		}
		list2.forEach(System.out::println);
		return list2;

	}

	// 4.根据菜品id修改菜品价格
	public void changPrice(String id, int afterprice) {
		if (findById(id) != null) {
			findById(id).setPrice(afterprice);
			System.out.println("修改成功");
		} else {
			System.out.println("没有该菜品");
		}
	}

	// 5.删除指定id的菜品
	public void deleteGreens(String id) {
		if (findById(id).getId() != null) {
			list.remove(findById(id));
			System.out.println("删除成功");
		} else {
			System.out.println("没有该菜品");
		}

	}
	//

	// 根据id找对应的菜品
	@Override
	public Greens findById(String id) {
		for (Greens G : list) {
			if (G.getId().equals(id)) {
				return G;
			}
		}
		return null;
	}

	@Override
	public void delete(String id) {
		// TODO Auto-generated method stub

	}

}

管理订单类

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class ManagerIndent implements DAO<Indent> {
	// 新建list来存储订单
	List<Indent> listI = new ArrayList();

	// 添加订单
	@Override
	public void insert(Indent t) {
		listI.add(t);
	}

	// 根据订单id找订单
	@Override
	public Indent findById(String id) {
		for (Indent i : listI) {
			if (i.getIndentNumber().equals(id)) {
				return i;
			}
		}

		return null;
	}

	// 9.订单列表显示
	@Override
	public List<Indent> findAll() {
		if (listI.size() != 0) {
			listI.forEach(System.out::println);
			return listI;
		}
		System.out.println("没有订单");
		return null;
	}

	// 10.根据订单id找修改状态
	public boolean Change(String id, int afterstatus) {
		if (findById(id) != null) {
			findById(id).setIndentState(afterstatus);
			System.out.println("修改成功");
			return true;
		} else if (findById(id) == null) {
			System.out.println("修改失败");
			return false;
		}
		return false;

	}

	@Override
	public void delete(String id) {
		// TODO Auto-generated method stub

	}

}

管理界面类

import java.util.ArrayList;
import java.util.List;

public class ManagerInterface {

	// 新建两个管理员
	List<Manager> list = new ArrayList();
	{
		adds();
	}

	public void adds() {
		list.add(new Manager("admin", "softeemadmin", "123456"));
		list.add(new Manager("admin1", "softeemadmin1", "123456"));

	}

	public List<Manager> findall() {
//		list.forEach(System.out::println);
		return list;

	}

	// 管理员界面
	static public void interF() {
		System.out.println("1添加菜品");
		System.out.println("2查看所有菜品信息(包含分页功能)");
		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的客户");
		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");
	}

	// 11.退出
	static public void exit() {

		System.exit(0);
	}
}

测试类

import java.util.Date;
import java.util.Scanner;

public class Test {

	public static void main(String[] args) {
		ManagerInterface Mi = new ManagerInterface();
		ManagerGreens Mg = new ManagerGreens();
		Mg.adds();
		ManagerCustomer Mc = new ManagerCustomer();
		CustomerBuy Cb = new CustomerBuy();

		ManagerIndent Md = new ManagerIndent();
		System.out.println("1.普通用户登录");
		System.out.println("2.管理员登录");
		Scanner sc = new Scanner(System.in);
		int i = sc.nextInt();
//		 请输入是管理员登录还是普通用户登录
		switch (i) {
		case 1:
			Customer cnow = new Customer();
			System.out.println("请先登录");
			System.out.println("请输入账号");
			String id1 = sc.next();
			System.out.println("请输入密码");
			String pas1 = sc.next();
			for (Customer c : Mc.findAll()) {
				if (c.getId().equals(id1) && c.getPassword().equals(pas1)) {
					cnow = c;
					System.out.println("登录成功");
					System.out.println(cnow);
				}
			}
			if (cnow.getId() == null) {
				System.out.println("登录失败");
				return;
			}
			for (;;) {
				Cb.CustomerInterface();
				System.out.println("请输入要进行的操作");
				int j = sc.nextInt();
				switch (j) {
				// 显示菜品
				case 1:
					Cb.showAll().forEach(System.out::println);
					;
					break;
				// 点餐
				case 2:
					Cb.BuyGreens("1", 10, cnow);
					break;
				// 根据菜品类品显示
				case 3:
					Cb.showGreens("面条");
					break;
				// 查看所有订单
				case 4:
					Cb.showIndent();
					break;
				// 修改密码
				case 5:
					Cb.changpas(cnow, "777777");
					break;
				// 个人信息显示
				case 6:
					Cb.showself(cnow);
					break;
				// 退出
				case 7:
					Cb.exit();
					break;
				}
			}
		case 2:
			Manager mnow = new Manager();
			System.out.println("请先登录");
			System.out.println("请输入账号");
			String id2 = sc.next();
			System.out.println("请输入密码");
			String pas2 = sc.next();
			for (Manager m : Mi.findall()) {
				if (m.getId().equals(id2) && m.getPassword().equals(pas2)) {
					mnow = m;
					System.out.println("登录成功");
					System.out.println(mnow);
				}
			}
			if (mnow.getId() == null) {
				System.out.println("登录失败");
				return;
			}
			for (;;) {
				Mi.interF();
				System.out.println("请输入要进行的操作");
				int m = sc.nextInt();
				switch (m) {
				// 添加菜品
				case 1:
					Mg.insert(new Greens("100", "土豆肉丝炒饭", "饭", new Date(System.currentTimeMillis()), 10, 45, 5000));
					break;
				// 查看所有菜品
				case 2:
					Mg.findAll().forEach(System.out::println);
					;
					break;
				// 查看指定类别的菜品信息
				case 3:
					Mg.findBytype("面条");
					break;
				// 根据菜品id修改菜品价格
				case 4:
					Mg.changPrice("1", 300);
					break;
				// 删除指定id的菜品
				case 5:
					Mg.deleteGreens("2");
					break;
				// 添加客户
				case 6:
					Mc.insert(new Customer("10", "softeem10", "男", "123456", "softeem大楼", "123456789",
							new Date(System.currentTimeMillis())));
					break;
				// 查看客户列表
				case 7:
					Mc.findAll().forEach(System.out::println);
					;
					break;
				// 删除指定id的用户
				case 8:
					Mc.delete("2");
					break;
				// 订单列表显示
				case 9:
					Md.findAll();
					break;
				// 根据订单id修改订单状态
				case 10:
					Md.Change("id", 1);
					break;
				// 退出
				case 11:
					Mi.exit();
					break;

				}

			}
		}

	}
}