Java外卖点餐系统「附全部代码」

Posted 2022-04-22 Java小叮当

前言

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);

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() 
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