基于java的外卖点餐系统部分模块设计（无界面版）

本文主要是介绍基于java的外卖点餐系统部分模块设计（无界面版），希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

大家好，本次带来的是基于java的外卖点餐系统部分模块设计（无界面版），也算是对这一个月所学的检测吧，由于还没学习前端，所有只能在控制台进行界面模拟，可能存在一些小bug，望大家指正。

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一、创建实体类

本项目一个有4个实体类：Administrator（管理员类）、Client（客户类）、Dishes（菜品类）、OrderForm（订单类）。

Administrator（管理员类）

import java.util.ArrayList;
import java.util.List;/*** 管理员类* * @author Administrator**/public class Administrator {/** 管理员ID */private int aid;/** 账号 */private String azhangHao;/** 密码 */private String amiMa;public Administrator() {this(1001, "sunkai", "sunkai001");}private Administrator(int aid, String azhangHao, String amiMa) {super();this.aid = aid;this.azhangHao = azhangHao;this.amiMa = amiMa;}public int getAid() {return aid;}public void setAid(int aid) {this.aid = aid;}public String getAzhangHao() {return azhangHao;}public void setAzhangHao(String azhangHao) {this.azhangHao = azhangHao;}public String getAmiMa() {return amiMa;}public void setAmiMa(String amiMa) {this.amiMa = amiMa;}@Overridepublic String toString() {return "管理员id:" + aid + ", 账号:" + azhangHao + ", 密码:" + amiMa;}
}

Client（客户类）

import java.text.DateFormat;
import java.text.FieldPosition;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.Date;/*** 客户类* * @author Administrator**/public class Client {/** 客户id */private int cid;/** 客户名 */private String cname;/** 性别 */private String sex;/** 密码 */private String cmiMa;/** 送餐地址 */private String songCanDiZhi;/** 手机号 */private String shouJiHao;/** 创建时间 */private LocalDate chuangJianShiJian;private Client() {// TODO Auto-generated constructor stub}public Client(int cid, String cname, String sex, String cmiMa, String songCanDiZhi, String shouJiHao) {super();this.cid = cid;this.cname = cname;this.sex = sex;this.cmiMa = cmiMa;this.songCanDiZhi = songCanDiZhi;this.shouJiHao = shouJiHao;chuangJianShiJian = LocalDate.now();}public Client(int cid, String cname, String sex, String cmiMa, String shouJiHao) {super();this.cid = cid;this.cname = cname;this.sex = sex;this.cmiMa = cmiMa;this.shouJiHao = shouJiHao;chuangJianShiJian = LocalDate.now();}public int getCid() {return cid;}public void setCid(int cid) {this.cid = cid;}public String getCname() {return cname;}public void setCname(String cname) {this.cname = cname;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public String getCmiMa() {return cmiMa;}public void setCmiMa(String cmiMa) {this.cmiMa = cmiMa;}public String getSongCanDiZhi() {return songCanDiZhi;}public void setSongCanDiZhi(String songCanDiZhi) {this.songCanDiZhi = songCanDiZhi;}public String getShouJiHao() {return shouJiHao;}public void setShouJiHao(String shouJiHao) {this.shouJiHao = shouJiHao;}public LocalDate getChuangJianShiJian() {return chuangJianShiJian;}@Overridepublic String toString() {return "客户id：" + cid + ", 客户名：" + cname + ", 性别：" + sex + ", 密码：" + cmiMa + ", 送餐地址："+ songCanDiZhi + ", 手机号:" + shouJiHao + ", 创建时间:" + chuangJianShiJian;}
}

Dishes（菜品类）

import java.time.LocalDate;/*** 菜品类* * @author Administrator**/public class Dishes {/** 菜品ID */private int dno;/** 菜品名 */private String dname;/** 菜品类型 */private String dleiXin;/** 上架时间 */private LocalDate dshangJiaShiJian;/** 单价 */private double dshouJia;/** 月销售量 */private int dyueXiaoShouLiang;/** 总数量 */private int dzonShuLiang;private Dishes() {// TODO Auto-generated constructor stub}public Dishes(int dno, String dname, String dleiXin, double dshouJia,int dzonShuLiang) {super();this.dno = dno;this.dname = dname;this.dleiXin = dleiXin;this.dshangJiaShiJian = LocalDate.now();this.dshouJia = dshouJia;this.dzonShuLiang =  dzonShuLiang;}public int getDno() {return dno;}public void setDno(int dno) {this.dno = dno;}public String getDname() {return dname;}public void setDname(String dname) {this.dname = dname;}public String getDleiXin() {return dleiXin;}public void setDleiXin(String dleiXin) {this.dleiXin = dleiXin;}public LocalDate getDshangJiaShiJian() {return dshangJiaShiJian;}public double getDshouJia() {return dshouJia;}public void setDshouJia(double dshouJia) {this.dshouJia = dshouJia;}public int getDyueXiaoShouLiang() {return dyueXiaoShouLiang;}public void setDyueXiaoShouLiang(int dyueXiaoShouLiang) {this.dyueXiaoShouLiang = dyueXiaoShouLiang;}public int getDzonShuLiang() {return dzonShuLiang;}public void setDzonShuLiang(int dzonShuLiang) {this.dzonShuLiang = dzonShuLiang;}@Overridepublic String toString() {return "菜品id：" + dno + ", 菜品名：" + dname + ", 菜品类型：" + dleiXin + ", 上架时间："+ dshangJiaShiJian + ", 单价：" + dshouJia + ", 月销售量：" + dyueXiaoShouLiang+ ", 总数量：" + dzonShuLiang;}
}

OrderForm（订单类）

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Map;public class OrderForm {/**订单号*/private int oid;/**订单创建时间*/private LocalDateTime datetime;/**菜品id及购买数*/private Map<Integer,Integer> dnoAndshuLian;/**客户id*/private int cid;/**总价格*/private double zonJiaGe;/**订单状态*/private int dingDanZhuangTai;public OrderForm() {// TODO Auto-generated constructor stub}public OrderForm(int oid, Map<Integer, Integer> dnoAndshuLian, int cid, double zonJiaGe,int dingDanZhuangTai) {super();this.oid = oid;this.datetime = LocalDateTime.now();this.dnoAndshuLian = dnoAndshuLian;this.cid = cid;this.zonJiaGe = zonJiaGe;this.dingDanZhuangTai = dingDanZhuangTai;}public int getOid() {return oid;}public void setOid(int oid) {this.oid = oid;}public LocalDateTime getDatetime() {return datetime;}public void setDatetime(LocalDateTime datetime) {this.datetime = datetime;}public Map<Integer, Integer> getDnoAndshuLian() {return dnoAndshuLian;}public void setDnoAndshuLian(Map<Integer, Integer> dnoAndshuLian) {this.dnoAndshuLian = dnoAndshuLian;}public int getCid() {return cid;}public void setCid(int cid) {this.cid = cid;}public double getZonJiaGe() {return zonJiaGe;}public void setZonJiaGe(double zonJiaGe) {this.zonJiaGe = zonJiaGe;}public int getDingDanZhuangTai() {return dingDanZhuangTai;}public void setDingDanZhuangTai(int dingDanZhuangTai) {this.dingDanZhuangTai = dingDanZhuangTai;}//返回由菜品id和购买数拼接成的字符串public StringBuffer sk() {StringBuffer s = new StringBuffer();dnoAndshuLian.entrySet().stream().forEach(e->{s.append("\n菜品id:"+e.getKey().toString()+"\t购买数："+e.getValue().toString());});return s;}//将订单创建的时间格式改为yyyy.MM.dd HH:mm:sspublic String ks() {return datetime.format(DateTimeFormatter.ofPattern("yyyy.MM.dd HH:mm:ss"));}@Overridepublic String toString() {return "订单号:" + oid + ", 订单创建时间:" + ks() + ", 客户id:" + cid+sk()+ "\n总价格：" + zonJiaGe + ", 订单状态：" + dingDanZhuangTai ;}
}

二、管理类

本系统共有1个接口加4个管理类：DAO（管理类接口）、AdminManagement（管理员管理类）、ClientManagement（客户管理类）、DishesManagement（菜品管理类）、OrderManagement（订单管理类）

DAO（管理类接口）

import java.util.List;public interface DAO<T> {/** 添加T类型对象到Map中 */boolean insert(T t);/** 根据id获取Map中的元素 */T findById(int id);/** 返回map中的所有元素值集 */List<T> findAll();/** 根据id删除Map中的元素 */boolean delete(int id);}

AdminManagement（管理员管理类）

* 管理员管理类* 采用单例模式（饿汉式）* @author Lenovo**/
import com.sunkai.chengyuanlei.Administrator;public class AdminManagement {/**创建管理员对象 ,同时只允许一个管理员对象存在*/private static Administrator admin = new Administrator();/**创建管理员管理对象*/private static AdminManagement am = new AdminManagement();private AdminManagement() { }public static AdminManagement toAdmin() {return am;}/**管理员登录*/public boolean guanLiYuanDengLu(String s1,String s2) {boolean bl = false;if(admin.getAzhangHao().equals(s1)&&admin.getAmiMa().equals(s2)) {bl = true;}return bl;}
}

ClientManagement（客户管理类）

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;import com.sunkai.chengyuanlei.Client;
import com.sunkai.chengyuanlei.Dishes;public class ClientManagement implements DAO<Client> {/**存储客户信息的map集合，键为客户id、值为客户信息*/private static Map<Integer, Client> map = new HashMap<>();/**存储当前登录的客户id*/private static int id;public static int getId() {return id;}@Override/** 将客户信息存到Map集合中 */public boolean insert(Client t) {boolean bl = true;if (map.containsKey(t.getCid())) {bl = false;} else {map.put(t.getCid(), t);}return bl;}@Override/** 根据客户ID查询客户信息 */public Client findById(int id) {Client d = null;if (map.containsKey(id)) {d = map.get(id);}return d;}@Override/** 返回所有客户信息所构成的集合 */public List<Client> findAll() {Collection<Client> values = map.values();return new ArrayList(values);}@Override/** 根据ID删除客户信息 */public boolean delete(int id) {boolean bl = true;if (map.containsKey(id)) {map.remove(id);} else {bl = false;}return bl;}/** 将客户信息进行分页显示,每页最多5条信息 */public List<Client> fenYe(List<Client> list, int a) {int b = list.size() / 5;int c = list.size() % 5;if (a > b && c == 0 || a > (b + 1)) {} else if (a == (b + 1) && c != 0) {list = list.subList(5 * (a - 1), list.size());} else {list = list.subList(5 * (a - 1), 5 * a);}return list;}/** 查看所有客户信息,以分页的方式显示，每页最多显示5条信息 */public List<Client> fenYeXianShi(int a) {List<Client> list = findAll();//接收第a页的菜品信息的集合list = fenYe(list, a);return list;}/**用户登录*/public boolean yonHuDengLu(String s1,String s2) {boolean bl = false;List<Client> list = findAll();for(Client c:list) {if(c.getShouJiHao().equals(s1)&&c.getCmiMa().equals(s2)) {id = c.getCid();bl = true;}}return bl;}/**修改密码（当前登录用户）*/public boolean xiuGaiMiMa(String s) {boolean bl = false;//密码限制：只能是6-10位的数字或字母if(s.matches("^[1-9a-zA-Z]\\w{5,9}")) {map.get(id).setCmiMa(s);bl = true;}return bl;}/**显示当前登录用户的信息*/public Client xianShiDangQianYonHu() {return map.get(id);}}

DishesManagement（菜品管理类）

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
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.Collector;
import java.util.stream.Collectors;/*** 菜品管理类*/import com.sunkai.chengyuanlei.Dishes;public class DishesManagement implements DAO<Dishes> {/** 存储菜品信息的Map集合，键为菜品ID，值为菜品类 */private static Map<Integer, Dishes> map = new HashMap<>();@Override/** 添加菜品信息到Map集合 */public boolean insert(Dishes t) {boolean bl = true;if (map.containsKey(t.getDno())) {bl = false;} else {map.put(t.getDno(), t);}return bl;}@Override/** 根据id获取菜品信息 */public Dishes findById(int id) {Dishes d = null;if (map.containsKey(id)) {d = map.get(id);}return d;}@Override/** 返回所有菜品信息所构成的集合 */public List<Dishes> findAll() {Collection<Dishes> values = map.values();return new ArrayList(values);}@Override/** 删除指定ID的菜品 */public boolean delete(int id) {boolean bl = true;if (map.containsKey(id)) {map.remove(id);} else {bl = false;}return bl;}/** 将菜品信息进行分页显示,每页最多5条信息 */public List<Dishes> fenYe(List<Dishes> list, int a) {int b = list.size() / 5;int c = list.size() % 5;if (a > b && c == 0 || a > (b + 1)) {} else if (a == (b + 1) && c != 0) {list = list.subList(5 * (a - 1), list.size());} else {list = list.subList(5 * (a - 1), 5 * a);}return list;}/** 查看所有菜品信息,以分页的方式显示，每页最多显示5条信息 */public List<Dishes> fenYeXianShi(int a) {List<Dishes> list = findAll();//接收第a页的菜品信息的集合list = fenYe(list, a);return list;}/** 查看指定类别的菜品信息 */public List<Dishes> anLeiBie(String s) {List<Dishes> list = findAll();// 筛选符合要求的菜品，并返回新的集合list = list.stream().filter(d -> d.getDleiXin().equals(s)).collect(Collectors.toList());return list;}/** 根据菜品ID修改菜品价格 */public boolean xiuGaiJiaGe(int id, double b) {List<Dishes> list = findAll();Dishes d = findById(id);boolean bl = true;if (d != null) {d.setDshouJia(b);} else {bl = false;}return bl;}/** 显示所有菜品(按菜品销量从高到低排序输出) */public List<Dishes> xianShiSuoYouCaiPin(int a) {List<Dishes> list = findAll();// 将所有菜品信息按照销售量从高到低排序list = list.stream().sorted((d1, d2) -> d2.getDyueXiaoShouLiang() - d1.getDyueXiaoShouLiang()).collect(Collectors.toList());//将排好序的菜品信息进行分页list = fenYe(list,a);return list;}/** 根据菜品类别显示所有菜品 */public List<Dishes> genJuLeiBie(int a) {List<Dishes> list = findAll();//将类别一样的菜品信息放到一起list = list.stream().sorted((d1,d2)->d1.getDleiXin().compareTo(d2.getDleiXin())).collect(Collectors.toList());//然后将菜品信息进行分页list = fenYe(list, a);return list;}}

OrderManagement（订单管理类）

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;import com.sunkai.chengyuanlei.Client;
import com.sunkai.chengyuanlei.OrderForm;public class OrderManagement implements DAO<OrderForm> {/**存储订单信息的map集合，键为订单id、值为订单信息*/Map<Integer, OrderForm> map = new HashMap<>();@Override/**添加订单信息到集合中*/public boolean insert(OrderForm t) {boolean bl = true;if (map.containsKey(t.getCid())) {bl = false;} else {map.put(t.getCid(), t);}return bl;}@Override/**根据定订单id获取订单信息*/public OrderForm findById(int id) {OrderForm o = null;if (map.containsKey(id)) {o = map.get(id);}return o;}@Override/**返回所有订单信息构成的集合*/public List<OrderForm> findAll() {Collection<OrderForm> values = map.values();return new ArrayList(values);}@Override/**根据订单id删除订单*/public boolean delete(int id) {boolean bl = true;if (map.containsKey(id)) {map.remove(id);} else {bl = false;}return bl;}/**显示当前登录用户的订单*/public OrderForm yonHuDingDan() {List<OrderForm> list = findAll();OrderForm order = null;for(OrderForm o: list) {if(o.getCid()==ClientManagement.getId()) {order = o;}}return order;}/** 将订单信息进行分页显示,每页最多5条信息 */public List<OrderForm> fenYe(List<OrderForm> list, int a) {int b = list.size() / 5;int c = list.size() % 5;if (a > b && c == 0 || a > (b + 1)) {} else if (a == (b + 1) && c != 0) {list = list.subList(5 * (a - 1), list.size());} else {list = list.subList(5 * (a - 1), 5 * a);}return list;}/** 查看所有订单信息,以分页的方式显示，每页最多显示5条信息 */public List<OrderForm> fenYeXianShi(int a) {List<OrderForm> list = findAll();//接收第a页的菜品信息的集合list = fenYe(list, a);return list;}/**根据订单ID修改订单状态* （0:未支付 1：已支付 2：配送中 3：已完成）*/public boolean xiuGaiDinDanZhuangTai(int a,int b) {boolean bl = false;if(map.containsKey(a)) {map.get(a).setDingDanZhuangTai(b);bl = true;}return bl;		}
}

三、界面类

import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Scanner;
import com.sunkai.chengyuanlei.Client;
import com.sunkai.chengyuanlei.Dishes;
import com.sunkai.chengyuanlei.OrderForm;
import com.sunkai.guanlilei.AdminManagement;
import com.sunkai.guanlilei.ClientManagement;
import com.sunkai.guanlilei.DishesManagement;
import com.sunkai.guanlilei.OrderManagement;public class Main {/** 创建Scanner对象，用于从对象接收数据 */private static Scanner sc = new Scanner(System.in);/** 创建管理员管理对象 */private static AdminManagement am = AdminManagement.toAdmin();/** 创建用户管理对象 */private static ClientManagement client = new ClientManagement();/** 创建菜品管理对象 */private static DishesManagement dm = new DishesManagement();/** 创建订单管理对象 */private static OrderManagement om = new OrderManagement();/** 定义一个用于生成用户id的变量，初始值为10001,每创建一个用户就+1 */private static int cid = 10001;/** 定义一个用于生成菜品id的变量，初始值为10001,每添加就一条菜品信息就+1 */private static int did = 10001;/** 定义一个用于生成订单id的变量，初始值为10001,每生成一个订单就+1 */private static int oid = 10001;/** 首页界面，包含：登录、注册、退出选项 */public void shouYeJieMian() {System.out.println("==========呆呆的餐厅=========");System.out.println("===========[1]登录==========");System.out.println("===========[2]注册==========");System.out.println("===========[0]退出==========");String a = sc.next();switch (a) {case "1":// 登录dengLuJieMian();break;case "2":// 注册zhuCeJieMian();break;default:// 退出return;}}/** 登录界面 */public void dengLuJieMian() {System.out.println("=========登录界面========");System.out.print("用户名：");String s1 = sc.next();System.out.print("密码：");String s2 = sc.next();// 先判断登录对象是否为管理员if (am.guanLiYuanDengLu(s1, s2)) {// 登录成功进入管理员功能界面guanLiYuanGonNengJieMian();// 如果管理员验证未通过，再进行客户登录验证} else if (client.yonHuDengLu(s1, s2)) {// 登录成功进入客户功能界面yonHuGonNengJieMian();} else {System.out.println("=====登录失败，请重新登录=====");dengLuJieMian();}}/** 用户注册界面 */public void zhuCeJieMian() {System.out.println("======注册界面======");System.out.print("名称：");String s1 = sc.next();System.out.print("性别：");String s2 = sc.next();System.out.print("送餐地址：");String s3 = sc.next();String s4;String s5;while (true) {System.out.print("手机号：");s4 = sc.next();System.out.print("密码：");s5 = sc.next();if (s4.matches("^1[0-9]{10}") && s5.matches("^[1-9a-zA-Z]\\w{5,9}")) {break;} else {System.out.println("手机号或密码错误");}}if (client.insert(new Client(cid, s1, s2, s5, s3, s4))) {// 用户创建成功，cid加一，供下一位用户创建时使用cid++;System.out.println("=======创建成功=======");} else {System.out.println("=======创建失败=======");}System.out.println("请牢记手机号和密码，这将是您登录本系统的凭证");System.out.println("=======[1]登录=======");System.out.println("=======[0]退出=======");String s = sc.next();switch (s) {case "1":// 登录界面dengLuJieMian();break;default:// 退出系统return;}}/** 管理员功能界面 */public void guanLiYuanGonNengJieMian() {System.out.println("================管理员===============");System.out.println("=============[1]添加菜品==============");System.out.println("=============[2]查看所有菜品信息========");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]返回首页界面=============");System.out.println("=============[0]退出系统================");String s1 = sc.next();switch (s1) {case "1":// 添加菜品tianJiaCaiPin();break;case "2":// 查看所有菜品信息chaKanSuoYoucaiPinXinXiJieMian();break;case "3":// 查看指定类别的菜品信息chaKanZhiDingLeiBieCaiPinXinXi();break;case "4":// 根据菜品id修改菜品价格genKJuCaiPinIdXiuGaiCaiPinJiage();break;case "5":// 删除指定id的菜品shanChuZhiDingIdDeCaiPin();break;case "6":// 添加客户tianJiaYonHuJieMian();break;case "7":// 查看客户列表chaKanKeHuLieBiaoJieMian();break;case "8":// 删除指定id的客户shanChuZhiDingIdDeKeHu();break;case "9":// 订单列表显示xianShiDingDanLieBiaoJieMian();break;case "10":// 根据订单id修改订单状态genKJuDinDanIdXiuGaiDinDanZhuangTai();break;case "11":// 返回首页界面shouYeJieMian();default:// 退出系统return;}}/** 用户功能界面 */public void yonHuGonNengJieMian() {System.out.println("================用户===============");System.out.println("=============[1]显示所有菜品==============");System.out.println("=============[2]根据菜品类别显示所有菜品========");System.out.println("=============[3]点餐========");System.out.println("=============[4]查看订单====");System.out.println("=============[5]修改密码====");System.out.println("=============[6]个人信息显示=========");System.out.println("=============[7]返回首页界面=============");System.out.println("=============[0]退出系统===============");String s1 = sc.next();switch (s1) {case "1":// 显示所有菜品xianShiSuoYoucaiPinJieMian();break;case "2":// 根据菜品类别显示所有菜品genJuCaiPinLeiBieXianShiSuoYouCaiPin();break;case "3":// 点餐dianCanJieMian();break;case "4":// 查看订单chaKanDingDan();break;case "5":// 修改密码xiuGaiMiMa();break;case "6":// 个人信息显示geRenXinXiXianShi();break;case "7":// 返回首页界面shouYeJieMian();default:// 退出系统return;}}/** 添加菜品 */public void tianJiaCaiPin() {System.out.println("============添加菜品=========");System.out.print("菜品名：");String s1 = sc.next();System.out.print("菜品类型：");String s2 = sc.next();System.out.print("单价：");double d1 = sc.nextDouble();System.out.print("总数量：");int i1 = sc.nextInt();if (dm.insert(new Dishes(did, s1, s2, d1, i1))) {// 菜品添加成功，did加一，供下一个菜品添加时使用did++;System.out.println("========添加成功=======");} else {System.out.println("=======添加失败=====");}System.out.println("=======[1]继续添加=====");System.out.println("=======[2]返回上一层=====");System.out.println("=======[0]退出系统======");String s3 = sc.next();switch (s3) {case "1":// 继续添加tianJiaCaiPin();break;case "2":// 返回管理员功能界面guanLiYuanGonNengJieMian();break;default:// 退出系统return;}}/** 查看所有菜品信息界面 */public void chaKanSuoYoucaiPinXinXiJieMian() {System.out.println("======所有菜品信息======");int a = 1;// 查看所有菜品信息(分页显示)chaKanSuoYoucaiPinXinXi(a);}/** 查看所有菜品信息 */public void chaKanSuoYoucaiPinXinXi(int a) {if (dm.fenYeXianShi(a).size() == 0) {System.out.println("暂无菜品信息");System.out.println("=======[1]继续查看=====");System.out.println("=======[2]返回上一层=====");System.out.println("=======[0]退出系统======");String s3 = sc.next();switch (s3) {case "1":// 继续查看chaKanSuoYoucaiPinXinXiJieMian();break;case "2":// 返回管理员功能界面guanLiYuanGonNengJieMian();break;default:// 退出系统return;}} else if (dm.fenYeXianShi(a).size() == 5) {for (Dishes d : dm.fenYeXianShi(a)) {System.out.println(d);}System.out.println("=======[1]上一页=====");System.out.println("=======[2]下一页=====");System.out.println("=======[3]返回上一层=====");System.out.println("=======[0]退出系统======");String s3 = sc.next();switch (s3) {case "1":// 上一页a--;chaKanSuoYoucaiPinXinXi(a);break;case "2":// 下一页a++;chaKanSuoYoucaiPinXinXi(a);break;case "3":// 返回管理员功能界面guanLiYuanGonNengJieMian();break;default:// 退出系统return;}} else {for (Dishes d : dm.fenYeXianShi(a)) {System.out.println(d);}System.out.println("=======[1]上一页=====");System.out.println("=======[2]返回上一层=====");System.out.println("=======[0]退出系统======");String s3 = sc.next();switch (s3) {case "1":// 上一页a--;chaKanSuoYoucaiPinXinXi(a);break;case "2":// 返回管理员功能界面guanLiYuanGonNengJieMian();break;default:// 退出系统return;}}}/** 查看指定类别菜品信息 */public void chaKanZhiDingLeiBieCaiPinXinXi() {System.out.println("========查看指定类别菜品信息=======");System.out.print("菜品类别：");String s1 = sc.next();if (dm.anLeiBie(s1).size() == 0) {System.out.println("=======无该类别菜品======");} else {for (Dishes d : dm.anLeiBie(s1)) {System.out.println(d);}}System.out.println("=======[1]继续查看=====");System.out.println("=======[2]返回上一层=====");System.out.println("=======[0]退出系统======");String s2 = sc.next();switch (s2) {case "1":// 继续查看chaKanZhiDingLeiBieCaiPinXinXi();break;case "2":// 返回管理员功能界面guanLiYuanGonNengJieMian();break;default:// 退出系统return;}}/** 根据菜品id修改菜品价格 */public void genKJuCaiPinIdXiuGaiCaiPinJiage() {System.out.println("==========根据菜品id修改菜品价格=========");System.out.print("菜品ID:");int a = sc.nextInt();System.out.print("菜品价格:");double d = sc.nextDouble();if (dm.xiuGaiJiaGe(a, d)) {System.out.println("=======修改成功======");} else {System.out.println("======修改失败，无对应菜品=====");}System.out.println("=======[1]继续修改=====");System.out.println("=======[2]返回上一层=====");System.out.println("=======[0]退出系统======");String s2 = sc.next();switch (s2) {case "1":// 继续修改genKJuCaiPinIdXiuGaiCaiPinJiage();break;case "2":// 返回管理员功能界面guanLiYuanGonNengJieMian();break;default:// 退出系统return;}}/** 删除指定id的菜品 */public void shanChuZhiDingIdDeCaiPin() {System.out.println("==========删除指定id的菜品=========");System.out.print("菜品ID:");int a = sc.nextInt();if (dm.delete(a)) {System.out.println("=======删除成功======");} else {System.out.println("======删除失败，无对应菜品=====");}System.out.println("=======[1]继续删除=====");System.out.println("=======[2]返回上一层=====");System.out.println("=======[0]退出系统======");String s2 = sc.next();switch (s2) {case "1":// 继续删除shanChuZhiDingIdDeCaiPin();break;case "2":// 返回管理员功能界面guanLiYuanGonNengJieMian();break;default:// 退出系统return;}}/** 添加用户界面 */public void tianJiaYonHuJieMian() {System.out.println("======添加用户界面======");System.out.print("名称：");String s1 = sc.next();System.out.print("性别：");String s2 = sc.next();System.out.print("送餐地址：");String s3 = sc.next();String s4;String s5;while (true) {System.out.print("手机号：");s4 = sc.next();System.out.print("密码：");s5 = sc.next();if (s4.matches("^1[0-9]{10}") && s5.matches("^[1-9a-zA-Z]\\w{5,9}")) {break;} else {System.out.println("手机号或密码错误");}}if (client.insert(new Client(cid, s1, s2, s5, s3, s4))) {// 用户添加成功，cid加一，供下一位用户创建时使用cid++;System.out.println("=======添加成功=======");} else {System.out.println("=======添加失败=======");}System.out.println("=======[1]继续添加====");System.out.println("=======[2]返回上一层====");System.out.println("=======[0]退出系统=======");String s = sc.next();switch (s) {case "1":// 继续添加tianJiaYonHuJieMian();break;case "2":guanLiYuanGonNengJieMian();break;default:// 退出系统return;}}/** 查看客户列表界面 */public void chaKanKeHuLieBiaoJieMian() {System.out.println("======所有客户信息======");int a = 1;// 查看所有客户信息(分页显示)chaKanKeHuLieBiao(a);}/** 查看客户列表 */public void chaKanKeHuLieBiao(int a) {if (client.fenYeXianShi(a).size() == 0) {System.out.println("暂无客户信息");System.out.println("=======[1]继续查看=====");System.out.println("=======[2]返回上一层=====");System.out.println("=======[0]退出系统======");String s3 = sc.next();switch (s3) {case "1":// 继续查看chaKanKeHuLieBiaoJieMian();break;case "2":// 返回管理员功能界面guanLiYuanGonNengJieMian();break;default:// 退出系统return;}} else if (client.fenYeXianShi(a).size() == 5) {for (Client d : client.fenYeXianShi(a)) {System.out.println(d);}System.out.println("=======[1]上一页=====");System.out.println("=======[2]下一页=====");System.out.println("=======[3]返回上一层=====");System.out.println("=======[0]退出系统======");String s3 = sc.next();switch (s3) {case "1":// 上一页a--;chaKanKeHuLieBiao(a);break;case "2":// 下一页a++;chaKanKeHuLieBiao(a);break;case "3":// 返回管理员功能界面guanLiYuanGonNengJieMian();break;default:// 退出系统return;}} else {for (Client d : client.fenYeXianShi(a)) {System.out.println(d);}System.out.println("=======[1]上一页=====");System.out.println("=======[2]返回上一层=====");System.out.println("=======[0]退出系统======");String s3 = sc.next();switch (s3) {case "1":// 上一页a--;chaKanKeHuLieBiao(a);break;case "2":// 返回管理员功能界面guanLiYuanGonNengJieMian();break;default:// 退出系统return;}}}/** 删除指定id的客户 */public void shanChuZhiDingIdDeKeHu() {System.out.println("==========删除指定id的客户=========");System.out.print("客户ID:");int a = sc.nextInt();if (client.delete(a)) {System.out.println("=======删除成功======");} else {System.out.println("======删除失败，无对应客户=====");}System.out.println("=======[1]继续删除=====");System.out.println("=======[2]返回上一层=====");System.out.println("=======[0]退出系统======");String s2 = sc.next();switch (s2) {case "1":// 继续删除shanChuZhiDingIdDeKeHu();break;case "2":// 返回管理员功能界面guanLiYuanGonNengJieMian();break;default:// 退出系统return;}}/** 显示订单列表界面 */public void xianShiDingDanLieBiaoJieMian() {System.out.println("======所有订单信息======");int a = 1;// 查看所有订单信息(分页显示)xianShiDingDanLieBiao(a);}/** 查看订单列表 */public void xianShiDingDanLieBiao(int a) {if (om.fenYeXianShi(a).size() == 0) {System.out.println("暂无订单信息");System.out.println("=======[1]继续查看=====");System.out.println("=======[2]返回上一层=====");System.out.println("=======[0]退出系统======");String s3 = sc.next();switch (s3) {case "1":// 继续查看xianShiDingDanLieBiaoJieMian();break;case "2":// 返回管理员功能界面guanLiYuanGonNengJieMian();break;default:// 退出系统return;}} else if (om.fenYeXianShi(a).size() == 5) {for (OrderForm d : om.fenYeXianShi(a)) {System.out.println(d);}System.out.println("=======[1]上一页=====");System.out.println("=======[2]下一页=====");System.out.println("=======[3]返回上一层=====");System.out.println("=======[0]退出系统======");String s3 = sc.next();switch (s3) {case "1":// 上一页a--;xianShiDingDanLieBiao(a);break;case "2":// 下一页a++;xianShiDingDanLieBiao(a);break;case "3":// 返回管理员功能界面guanLiYuanGonNengJieMian();break;default:// 退出系统return;}} else {for (OrderForm d : om.fenYeXianShi(a)) {System.out.println(d);}System.out.println("=======[1]上一页=====");System.out.println("=======[2]返回上一层=====");System.out.println("=======[0]退出系统======");String s3 = sc.next();switch (s3) {case "1":// 上一页a--;xianShiDingDanLieBiao(a);break;case "2":// 返回管理员功能界面guanLiYuanGonNengJieMian();break;default:// 退出系统return;}}}/** 根据订单id修改订单状态 */public void genKJuDinDanIdXiuGaiDinDanZhuangTai() {System.out.println("==========根据订单id修改订单状态=========");System.out.print("订单ID:");int a = sc.nextInt();System.out.print("订单状态(0:未支付 1：已支付 2：配送中 3：已完成):");int d = sc.nextInt();if (om.xiuGaiDinDanZhuangTai(a, d)) {System.out.println("=======修改成功======");} else {System.out.println("======修改失败，无对应订单=====");}System.out.println("=======[1]继续修改=====");System.out.println("=======[2]返回上一层=====");System.out.println("=======[0]退出系统======");String s2 = sc.next();switch (s2) {case "1":// 继续修改genKJuDinDanIdXiuGaiDinDanZhuangTai();break;case "2":// 返回管理员功能界面guanLiYuanGonNengJieMian();break;default:// 退出系统return;}}/** 显示所有菜品界面 */public void xianShiSuoYoucaiPinJieMian() {System.out.println("======所有菜品信息======");int a = 1;// 查看所有菜品信息(分页显示)xianShiSuoYoucaiPin(a);}/** 查看所有菜品信息 */public void xianShiSuoYoucaiPin(int a) {if (dm.fenYeXianShi(a).size() == 0) {System.out.println("暂无菜品信息");System.out.println("=======[1]继续查看=====");System.out.println("=======[2]返回上一层=====");System.out.println("=======[0]退出系统======");String s3 = sc.next();switch (s3) {case "1":// 继续查看xianShiSuoYoucaiPinJieMian();break;case "2":// 返回用户功能界面yonHuGonNengJieMian();break;default:// 退出系统return;}} else if (dm.fenYeXianShi(a).size() == 5) {for (Dishes d : dm.fenYeXianShi(a)) {System.out.println(d);}System.out.println("=======[1]上一页=====");System.out.println("=======[2]下一页=====");System.out.println("=======[3]返回上一层=====");System.out.println("=======[0]退出系统======");String s3 = sc.next();switch (s3) {case "1":// 上一页a--;xianShiSuoYoucaiPin(a);break;case "2":// 下一页a++;xianShiSuoYoucaiPin(a);break;case "3":// 返回用户功能界面yonHuGonNengJieMian();break;default:// 退出系统return;}} else {for (Dishes d : dm.fenYeXianShi(a)) {System.out.println(d);}System.out.println("=======[1]上一页=====");System.out.println("=======[2]返回上一层=====");System.out.println("=======[0]退出系统======");String s3 = sc.next();switch (s3) {case "1":// 上一页a--;xianShiSuoYoucaiPin(a);break;case "2":// 返回用户功能界面yonHuGonNengJieMian();break;default:// 退出系统return;}}}/** 根据菜品类别显示所有菜品 */public void genJuCaiPinLeiBieXianShiSuoYouCaiPin() {System.out.println("========查看指定类别菜品信息=======");System.out.print("菜品类别：");String s1 = sc.next();if (dm.anLeiBie(s1).size() == 0) {System.out.println("=======无该类别菜品======");} else {for (Dishes d : dm.anLeiBie(s1)) {System.out.println(d);}}System.out.println("=======[1]继续查看=====");System.out.println("=======[2]返回上一层=====");System.out.println("=======[0]退出系统======");String s2 = sc.next();switch (s2) {case "1":// 继续查看genJuCaiPinLeiBieXianShiSuoYouCaiPin();break;case "2":// 返回用户功能界面yonHuGonNengJieMian();break;default:// 退出系统return;}}/** 点餐界面 */public void dianCanJieMian() {// 存储用户所点菜品的id和购买数Map<Integer, Integer> map = new LinkedHashMap<Integer, Integer>();// 存储用户所点菜品的总价格int sum = 0;System.out.println("============点餐界面===========");s: while (true) {System.out.println("菜品id及购买数：");// 菜品idint a = sc.nextInt();// 购买数量int b = sc.nextInt();if (dm.findById(a) != null) {if (dm.findById(a).getDzonShuLiang() < b) {b = dm.findById(a).getDzonShuLiang();}map.put(a, b);sum += (dm.findById(a).getDshouJia() * b);System.out.println("======[1]继续点餐=====");if (sum != 0) {System.out.println("======[2]结算========");}System.out.println("======[3]返回上一界面========");System.out.println("======[0]退出系统========");String s1 = sc.next();switch (s1) {case "1":continue s;case "2":break;case "3":yonHuGonNengJieMian();break;default:return;}if (om.insert(new OrderForm(oid, map, ClientManagement.getId(), sum, 0))) {oid++;dm.findById(a).setDyueXiaoShouLiang(dm.findById(a).getDyueXiaoShouLiang() + b);dm.findById(a).setDzonShuLiang(dm.findById(a).getDzonShuLiang() - b);System.out.println("=======点餐成功，一共" + sum + "元，请付款=======");// 付款fuKuan(sum);System.out.println("======[1]返回上一界面========");System.out.println("======[0]退出系统========");String s2 = sc.next();switch (s2) {case "1":yonHuGonNengJieMian();break;default:return;}}} else {System.out.println("======[1]继续点餐=====");System.out.println("======[2]返回上一界面========");System.out.println("======[0]退出系统========");String s1 = sc.next();switch (s1) {case "1":continue s;case "2":yonHuGonNengJieMian();break;default:return;}}}}/** 付款 */public void fuKuan(int sum) {System.out.print("付款：");sum -= sc.nextInt();if (sum == 0) {System.out.println("=======付款成功,请稍等，美食稍后就好=====");} else if (sum < 0) {System.out.println("==付款成功，找您" + (-sum) + "元===");} else {System.out.println("===还差" + sum + "元，请继续付款===");fuKuan(sum);}}/** 用户查看订单 */public void chaKanDingDan() {System.out.println("=====您的订单如下=====");System.out.println(om.yonHuDingDan());System.out.println("======[1]继续查看========");System.out.println("======[2]返回上一界面========");System.out.println("======[0]退出系统========");String s1 = sc.next();switch (s1) {case "1":chaKanDingDan();case "2":yonHuGonNengJieMian();break;default:return;}}/** 用户修改密码 */public void xiuGaiMiMa() {System.out.println("=========修改密码(密码限制：只能是6-10位的数字或字母,不能0开头)========");System.out.print("新密码：");String s1 = sc.next();if (client.xiuGaiMiMa(s1)) {System.out.println("=====修改成功，请牢记密码=====");} else {System.out.println("=====修改失败，请注意密码格式===");}System.out.println("======[1]继续修改========");System.out.println("======[2]返回上一界面========");System.out.println("======[0]退出系统========");String s2 = sc.next();switch (s2) {case "1":xiuGaiMiMa();break;case "2":yonHuGonNengJieMian();break;default:return;}}/** 个人信息显示 */public void geRenXinXiXianShi() {System.out.println("=====以下是您的个人信息=====");System.out.println(client.xianShiDangQianYonHu());System.out.println("======[1]继续显示========");System.out.println("======[2]返回上一界面========");System.out.println("======[0]退出系统========");String s2 = sc.next();switch (s2) {case "1":geRenXinXiXianShi();break;case "2":yonHuGonNengJieMian();break;default:return;}}
}

测试：

public class Test {public static void main(String[] args) {Main m = new Main();m.shouYeJieMian();}}

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