外卖点餐系统的实现

实体类的编写

(1)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)

import java.util.Date;public class Menu {private String mid;private String name;private String type;private Date dateIssued;private double price;private int monthlySales;private int totalQuantity;public Menu() {super();// TODO Auto-generated constructor stub}public Menu(String mid, String name, String type, Date dateIssued, double price, int monthlySales, int totalQuantity) {super();this.mid = mid;this.name = name;this.type = type;this.dateIssued = dateIssued;this.price = price;this.monthlySales = monthlySales;this.totalQuantity = totalQuantity;}public String getMid() {return mid;}public void setMid(String mid) {this.mid = mid;}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 getDateIssued() {return dateIssued;}public void setDateIssued(Date dateIssued) {this.dateIssued = dateIssued;}public double getPrice() {return price;}public void setPrice(double price) {this.price = price;}public int getMonthlySales() {return monthlySales;}public void setMonthlySales(int monthlySales) {this.monthlySales = monthlySales;}public int getTotalQuantity() {return totalQuantity;}public void setTotalQuantity(int totalQuantity) {this.totalQuantity = totalQuantity;}@Overridepublic int hashCode() {final int prime = 31;int result = 1;result = prime * result + ((dateIssued == null) ? 0 : dateIssued.hashCode());result = prime * result + ((mid == null) ? 0 : mid.hashCode());result = prime * result + monthlySales;result = prime * result + ((name == null) ? 0 : name.hashCode());long temp;temp = Double.doubleToLongBits(price);result = prime * result + (int) (temp ^ (temp >>> 32));result = prime * result + totalQuantity;result = prime * result + ((type == null) ? 0 : type.hashCode());return result;}@Overridepublic boolean equals(Object obj) {if (this == obj)return true;if (obj == null)return false;if (getClass() != obj.getClass())return false;Menu other = (Menu) obj;if (dateIssued == null) {if (other.dateIssued != null)return false;} else if (!dateIssued.equals(other.dateIssued))return false;if (mid == null) {if (other.mid != null)return false;} else if (!mid.equals(other.mid))return false;if (monthlySales != other.monthlySales)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 (totalQuantity != other.totalQuantity)return false;if (type == null) {if (other.type != null)return false;} else if (!type.equals(other.type))return false;return true;}@Overridepublic String toString() {return "Menu [mid=" + mid + ", name=" + name + ", type=" + type + ", dateIssued=" + dateIssued + ", price="+ price + ", monthlySales=" + monthlySales + ", totalQuantity=" + totalQuantity + "]";}}

import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Scanner;
import java.util.Set;
import java.util.stream.Collectors;public class MenuManager implements DAO<Menu> {static Map<String, Menu> map = new HashMap<String, Menu>();static {map.put("01", new Menu("01", "邹蹄", "垃圾食品", new Date(2020,10,12), 200, 1200, 500));map.put("02", new Menu("02", "邹腰子", "垃圾食品", new Date(2020,9,22), 30, 1000, 20));map.put("03", new Menu("03", "邹大肠", "垃圾食品", new Date(2020,10,23), 88.8, 900, 1000));map.put("04", new Menu("04", "邹肉", "垃圾食品", new Date(2020,1,1), 99.99, 10, 8829));map.put("05", new Menu("05", "邹头", "垃圾食品", new Date(2020,7,7), 3300, 20000, 4287));map.put("06", new Menu("06", "邹鞭", "补品", new Date(), 998, 999999, 9999));}@Overridepublic void insert(Menu menu) {map.put(menu.getMid(), menu);}@Overridepublic Menu findById(String id) {return map.get(id);}//显示所有菜品(按菜品销量从高到低排序输出)@Overridepublic List findAll() {List<Entry<String,Menu>> list = map.entrySet().stream().sorted((p1,p2) -> p2.getValue().getMonthlySales() - p1.getValue().getMonthlySales()).collect(Collectors.toList());return list;}@Overridepublic void delete(String id) {map.remove(id);}/*** 查看指定类别的菜品信息* @param type 菜品类别* @return*/public List<Menu> findByType(String type) {List<Menu> list = map.entrySet().stream().filter(p -> p.getValue().getType().equals(type)).map(p -> p.getValue()).collect(Collectors.toList());return list;}//根据菜品id修改菜品价格public void replacePrice(String mid, double price) {map.replace(mid, new Menu(mid, map.get(mid).getName(), map.get(mid).getType(), map.get(mid).getDateIssued(), price, map.get(mid).getMonthlySales(), map.get(mid).getTotalQuantity()));}//根据菜品id查询菜品价格public double showPrice(String mid) {return map.get(mid).getPrice();}//根据菜品类别显示所有菜品public void showType() {map.entrySet().stream().sorted((p1,p2) -> p1.getValue().getType().compareTo(p2.getValue().getType())).collect(Collectors.toList()).forEach(System.out::println);}//根据菜品id修改菜品数量public void replaceTotalQuantity(String mid, int totalQuantity) {map.replace(mid, new Menu(mid, map.get(mid).getName(), map.get(mid).getType(), map.get(mid).getDateIssued(), map.get(mid).getPrice(), map.get(mid).getMonthlySales(), map.get(mid).getTotalQuantity() - totalQuantity));}}

管理员类(管理员id，账号，密码)

public class Administrator {private String aid;private String account;private String password;public Administrator() {super();// TODO Auto-generated constructor stub}public Administrator(String aid, String account, String password) {super();this.aid = aid;this.account = account;this.password = password;}@Overridepublic int hashCode() {final int prime = 31;int result = 1;result = prime * result + ((account == null) ? 0 : account.hashCode());result = prime * result + ((aid == null) ? 0 : aid.hashCode());result = prime * result + ((password == null) ? 0 : password.hashCode());return result;}@Overridepublic boolean equals(Object obj) {if (this == obj)return true;if (obj == null)return false;if (getClass() != obj.getClass())return false;Administrator other = (Administrator) obj;if (account == null) {if (other.account != null)return false;} else if (!account.equals(other.account))return false;if (aid == null) {if (other.aid != null)return false;} else if (!aid.equals(other.aid))return false;if (password == null) {if (other.password != null)return false;} else if (!password.equals(other.password))return false;return true;}@Overridepublic String toString() {return "Administrator [aid=" + aid + ", account=" + account + ", password=" + password + "]";}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 getPassword() {return password;}public void setPassword(String password) {this.password = password;}}

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;public class AdministratorManager implements DAO<Administrator> {static Map<String, Administrator> map = new HashMap<String, Administrator>();static {map.put("admin", new Administrator("admin", "admin123", "12345"));}public void insert(Administrator t) {map.put(t.getAid(), t);}@Overridepublic Administrator findById(String id) {return map.get(id);}@Overridepublic List<Administrator> findAll() {List<Administrator> list = map.entrySet().stream().map(e -> e.getValue()).collect(Collectors.toList());return list;}@Overridepublic void delete(String id) {map.remove(id);}}

客户类(客户id，客户名，性别，密码，送餐地址，手机号，创建时间)

import java.util.Date;public class Client {private String cid;private String name;private String sex;private String password;private String address;private String phone;private Date creationTime;public Client() {super();// TODO Auto-generated constructor stub}public Client(String cid, String name, String sex, String password, String address, String phone, Date creationTime) {super();this.cid = cid;this.name = name;this.sex = sex;this.password = password;this.address = address;this.phone = phone;this.creationTime = creationTime;}public String getCid() {return cid;}public void setCid(String cid) {this.cid = cid;}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 getPhone() {return phone;}public void setPhone(String phone) {this.phone = phone;}public Date getCreationTime() {return creationTime;}public void setCreationTime(Date creationTime) {this.creationTime = creationTime;}@Overridepublic int hashCode() {final int prime = 31;int result = 1;result = prime * result + ((address == null) ? 0 : address.hashCode());result = prime * result + ((cid == null) ? 0 : cid.hashCode());result = prime * result + ((creationTime == null) ? 0 : creationTime.hashCode());result = prime * result + ((name == null) ? 0 : name.hashCode());result = prime * result + ((password == null) ? 0 : password.hashCode());result = prime * result + ((phone == null) ? 0 : phone.hashCode());result = prime * result + ((sex == null) ? 0 : sex.hashCode());return result;}@Overridepublic boolean equals(Object obj) {if (this == obj)return true;if (obj == null)return false;if (getClass() != obj.getClass())return false;Client other = (Client) obj;if (address == null) {if (other.address != null)return false;} else if (!address.equals(other.address))return false;if (cid == null) {if (other.cid != null)return false;} else if (!cid.equals(other.cid))return false;if (creationTime == null) {if (other.creationTime != null)return false;} else if (!creationTime.equals(other.creationTime))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 (phone == null) {if (other.phone != null)return false;} else if (!phone.equals(other.phone))return false;if (sex == null) {if (other.sex != null)return false;} else if (!sex.equals(other.sex))return false;return true;}@Overridepublic String toString() {return "Client [cid=" + cid + ", name=" + name + ", sex=" + sex + ", password=" + password + ", address="+ address + ", phone=" + phone + ", creationTime=" + creationTime + "]";}}

import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.stream.Collectors;public class ClientManager implements DAO<Client> {static Map<String, Client> map = new HashMap<String, Client>();static {map.put("abc123", new Client("abc123", "张三", "男", "12345", "光谷金融港27栋9楼", "10086", new Date()));}@Overridepublic void insert(Client t) {map.put(t.getCid(), t);}@Overridepublic Client findById(String id) {return map.get(id);}@Overridepublic List<Client> findAll() {List<Client> list = map.entrySet().stream().map(e -> e.getValue()).collect(Collectors.toList());return list;}@Overridepublic void delete(String id) {map.remove(id);}//修改密码public void replacePassword(Client client, String password) {client.setPassword(password);map.replace(client.getCid(), client);}}

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)

import java.util.Date;public class Indent {private String no;private Date creationTime;private String mid;private int buyNumber;private String cid;private double totalPrice;private int orderStatus;public Indent() {super();// TODO Auto-generated constructor stub}public Indent(String no, Date creationTime, String mid, int buyNumber, String cid, double totalPrice,int orderStatus) {super();this.no = no;this.creationTime = creationTime;this.mid = mid;this.buyNumber = buyNumber;this.cid = cid;this.totalPrice = totalPrice;this.orderStatus = orderStatus;}public String getNo() {return no;}public void setNo(String no) {this.no = no;}public Date getCreationTime() {return creationTime;}public void setCreationTime(Date creationTime) {this.creationTime = creationTime;}public String getMid() {return mid;}public void setMid(String mid) {this.mid = mid;}public int getBuyNumber() {return buyNumber;}public void setBuyNumber(int buyNumber) {this.buyNumber = buyNumber;}public String getCid() {return cid;}public void setCid(String cid) {this.cid = cid;}public double getTotalPrice() {return totalPrice;}public void setTotalPrice(double totalPrice) {this.totalPrice = totalPrice;}public int getOrderStatus() {return orderStatus;}public void setOrderStatus(int orderStatus) {this.orderStatus = orderStatus;}@Overridepublic int hashCode() {final int prime = 31;int result = 1;result = prime * result + buyNumber;result = prime * result + ((cid == null) ? 0 : cid.hashCode());result = prime * result + ((creationTime == null) ? 0 : creationTime.hashCode());result = prime * result + ((mid == null) ? 0 : mid.hashCode());result = prime * result + ((no == null) ? 0 : no.hashCode());result = prime * result + orderStatus;long temp;temp = Double.doubleToLongBits(totalPrice);result = prime * result + (int) (temp ^ (temp >>> 32));return result;}@Overridepublic 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 (buyNumber != other.buyNumber)return false;if (cid == null) {if (other.cid != null)return false;} else if (!cid.equals(other.cid))return false;if (creationTime == null) {if (other.creationTime != null)return false;} else if (!creationTime.equals(other.creationTime))return false;if (mid == null) {if (other.mid != null)return false;} else if (!mid.equals(other.mid))return false;if (no == null) {if (other.no != null)return false;} else if (!no.equals(other.no))return false;if (orderStatus != other.orderStatus)return false;if (Double.doubleToLongBits(totalPrice) != Double.doubleToLongBits(other.totalPrice))return false;return true;}@Overridepublic String toString() {return "Indent [no=" + no + ", creationTime=" + creationTime + ", mid=" + mid + ", buyNumber=" + buyNumber+ ", cid=" + cid + ", totalPrice=" + totalPrice + ", orderStatus=" + orderStatus + "]";}}

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;public class IndentManager implements DAO<Indent> {static Map<String, Indent> map = new HashMap<String, Indent>();@Overridepublic void insert(Indent t) {map.put(t.getNo(), t);}@Overridepublic Indent findById(String id) {return map.get(id);}@Overridepublic List<Indent> findAll() {List<Indent> list = map.entrySet().stream().map(e -> e.getValue()).collect(Collectors.toList());return list;}@Overridepublic void delete(String no) {map.remove(no);}//根据id修改订单状态（0:未支付 1：已支付 2：配送中 3：已完成）public void replaceOrderStatus(String no, int orderStatus) {map.replace(no, new Indent(map.get(no).getNo(), map.get(no).getCreationTime(), map.get(no).getMid(), map.get(no).getBuyNumber(), map.get(no).getCid(), map.get(no).getTotalPrice(), orderStatus));}//查看当前登录客户的所有订单public void showIndent(String cid) {map.entrySet().stream().filter(p -> p.getValue().getCid().equals(cid)).collect(Collectors.toList()).forEach(System.out::println);}}

主体实现

import java.util.Date;
import java.util.List;
import java.util.Scanner;public class MySystem {static MenuManager menu = new MenuManager();static ClientManager client = new ClientManager();static IndentManager indent = new IndentManager();public static void p(Object s) {System.out.println(s);}public static void administratorPanel() {p("\t管理员系统面板\t");p("\t①添加菜品\t");p("\t②查看所有菜品信息(包含分页功能)\t");p("\t③查看指定类别的菜品信息\t");p("\t④根据菜品id修改菜品价格\t");p("\t⑤删除指定id的菜品\t");p("\t⑥添加客户\t");p("\t⑦查看客户列表\t");p("\t⑧删除指定id的客户\t");p("\t⑨订单列表显示\t");p("\t⑩根据订单id修改订单状态\t");p("\t⑪退出\t");p("请输入数字1~11，分别使用相应的功能");Scanner sc = new Scanner(System.in);switch (sc.nextInt()) {case 1:p("请按照顺序输入：菜品id/菜品名/菜品类型/上架时间/单价/月销售/总数量");menu.insert(new Menu(sc.next(), sc.next(), sc.next(), new Date(), sc.nextDouble(), sc.nextInt(), sc.nextInt()));administratorPanel();break;case 2:p("请输入需要查询的页数");int pageNow = sc.nextInt();p("请输入需要查询的页面数据条数");int pageSize = sc.nextInt();List<Menu> list = menu.findAll();list.stream().skip((pageNow - 1) * pageSize).limit(pageSize).forEach(System.out::println);administratorPanel();break;case 3:p("请输入菜品类别");String type = sc.nextLine();menu.findByType(type).stream().forEach(System.out::println);administratorPanel();break;case 4:p("请输入菜品id和修改后的菜品价格");String mid = sc.next();double price = sc.nextDouble();menu.replacePrice(mid, price);administratorPanel();break;case 5:p("请输入要删除菜品的id");String mid2 = sc.next();menu.delete(mid2);administratorPanel();break;case 6:p("添加客户,请按照顺序输入客户信息：客户id，客户名，性别，密码，送餐地址，手机号，创建时间");client.insert(new Client(sc.next(), sc.next(), sc.next(), sc.next(), sc.next(), sc.next(), new Date()));administratorPanel();break;case 7:List<Client> clientList = client.findAll();for (Client c : clientList) {System.out.println(c);}administratorPanel();break;case 8:p("请输入要删除客户的id");String cid = sc.next();client.delete(cid);administratorPanel();break;case 9:List<Indent> indentList = indent.findAll();for (Indent i : indentList) {System.out.println(i);}administratorPanel();break;case 10:p("请根据订单id修改订单状态orderStatus");p("请输入订单id");String no = sc.next();p("请输入要修改的订单状态（0:未支付 1：已支付 2：配送中 3：已完成）");int orderStatus = sc.nextInt();indent.replaceOrderStatus(no, orderStatus);administratorPanel();break;case 11:login();break;default:administratorPanel();break;}}public static void clientPanel(Client c) {p("\t用户系统面板\t");p("\t①显示所有菜品(按菜品销量从高到低排序输出)\t");p("\t②根据菜品类别显示所有菜品\t");p("\t③查看所有订单(当前登录用户的)\t");p("\t④修改密码（当前登录用户的）\t");p("\t⑤个人信息显示\t");p("\t⑥退出登录\t");p("请输入数字1~6，分别使用相应的功能");MenuManager menu = new MenuManager();Scanner sc = new Scanner(System.in);switch (sc.nextInt()) {case 1://显示所有菜品(按菜品销量从高到低排序输出)menu.findAll().stream().forEach(System.out::println);p("请输入菜品id");String mid = sc.next();p("请输入购买数量");int buyNumber = sc.nextInt();//修改菜品总数menu.replaceTotalQuantity(mid, buyNumber);//查询菜品价格double price = menu.showPrice(mid);indent.insert(new Indent(c.getCid()+mid, new Date(), mid, buyNumber, c.getCid(), price * buyNumber, 0));clientPanel(c);break;case 2:menu.showType();clientPanel(c);break;case 3:indent.showIndent(c.getCid());clientPanel(c);break;case 4:System.out.println("请输入修改后的密码");String password = sc.next();client.replacePassword(c, password);clientPanel(c);break;case 5:System.out.println(c.toString());clientPanel(c);break;case 6:login();break;default :clientPanel(c);}}public static void login() {AdministratorManager am = new AdministratorManager();ClientManager cm = new ClientManager();Scanner sc = new Scanner(System.in);p("请输入id");String id = sc.nextLine();p("请输入密码");String password = sc.nextLine();if(am.map.get(id) != null && am.map.get(id).getPassword().equals(password)) {p("管理员登录成功");administratorPanel();} else if(cm.map.get(id) != null && cm.map.get(id).getPassword().equals(password)) {p("客户登录成功");clientPanel(cm.map.get(id));} else {p("登录失败，请重新登录");login();}}public static void main(String[] args) {login();}}