外賣點餐系統的實現
實體類的編寫
(1)菜品類(菜品id，菜品名，菜品型別，上架時間，單價，月銷售，總數量)
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;
}
@Override
public 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;
}
@Override
public 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;
}
@Override
public 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", "鄒蹄", "垃圾食品", new Date(2020,10,12), 200, 1200, 500));
map.put("02", new Menu("02", "鄒腰子", "垃圾食品", new Date(2020,9,22), 30, 1000, 20));
map.put("03", new Menu("03", "鄒大腸", "垃圾食品", new Date(2020,10,23), 88.8, 900, 1000));
map.put("04", new Menu("04", "鄒肉", "垃圾食品", new Date(2020,1,1), 99.99, 10, 8829));
map.put("05", new Menu("05", "鄒頭", "垃圾食品", new Date(2020,7,7), 3300, 20000, 4287));
map.put("06", new Menu("06", "鄒鞭", "補品", new Date(), 998, 999999, 9999));
}
@Override
public void insert(Menu menu) {
map.put(menu.getMid(), menu);
}
@Override
public Menu findById(String id) {
return map.get(id);
}
//顯示所有菜品(按菜品銷量從高到低排序輸出)
@Override
public List findAll() {
List<Entry<String,Menu>> list = map.entrySet().stream()
.sorted((p1,p2) -> p2.getValue().getMonthlySales() - p1.getValue().getMonthlySales())
.collect(Collectors.toList());
return list;
}
@Override
public void delete(String id) {
map.remove(id);
}
/**
* 檢視指定類別的菜品資訊
* @param type 菜品類別
* @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;
}
//根據菜品id修改菜品價格
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()));
}
//根據菜品id查詢菜品價格
public double showPrice(String mid) {
return map.get(mid).getPrice();
}
//根據菜品類別顯示所有菜品
public void showType() {
map.entrySet().stream()
.sorted((p1,p2) -> p1.getValue().getType().compareTo(p2.getValue().getType()))
.collect(Collectors.toList())
.forEach(System.out::println);
}
//根據菜品id修改菜品數量
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));
}
}
管理員類(管理員id，賬號，密碼)
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;
}
@Override
public 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;
}
@Override
public 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;
}
@Override
public 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);
}
@Override
public Administrator findById(String id) {
return map.get(id);
}
@Override
public List<Administrator> findAll() {
List<Administrator> list = map.entrySet().stream()
.map(e -> e.getValue())
.collect(Collectors.toList());
return list;
}
@Override
public void delete(String id) {
map.remove(id);
}
}
客戶類(客戶id，客戶名，性別，密碼，送餐地址，手機號，建立時間)
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;
}
@Override
public 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;
}
@Override
public 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;
}
@Override
public 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", "張三", "男", "12345", "光谷金融港27棟9樓", "10086", new Date()));
}
@Override
public void insert(Client t) {
map.put(t.getCid(), t);
}
@Override
public Client findById(String id) {
return map.get(id);
}
@Override
public List<Client> findAll() {
List<Client> list = map.entrySet().stream()
.map(e -> e.getValue())
.collect(Collectors.toList());
return list;
}
@Override
public void delete(String id) {
map.remove(id);
}
//修改密碼
public void replacePassword(Client client, String password) {
client.setPassword(password);
map.replace(client.getCid(), client);
}
}
訂單類(訂單號，訂單建立時間，菜品id，購買數，客戶id，總價格，訂單狀態)
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;
}
@Override
public 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;
}
@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 (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;
}
@Override
public 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>();
@Override
public void insert(Indent t) {
map.put(t.getNo(), t);
}
@Override
public Indent findById(String id) {
return map.get(id);
}
@Override
public List<Indent> findAll() {
List<Indent> list = map.entrySet().stream()
.map(e -> e.getValue())
.collect(Collectors.toList());
return list;
}
@Override
public void delete(String no) {
map.remove(no);
}
//根據id修改訂單狀態（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));
}
//檢視當前登入客戶的所有訂單
public void showIndent(String cid) {
map.entrySet().stream()
.filter(p -> p.getValue().getCid().equals(cid))
.collect(Collectors.toList())
.forEach(System.out::println);
}
}
主體實現
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管理員系統皮膚\t");
p("\t①新增菜品\t");
p("\t②檢視所有菜品資訊(包含分頁功能)\t");
p("\t③檢視指定類別的菜品資訊\t");
p("\t④根據菜品id修改菜品價格\t");
p("\t⑤刪除指定id的菜品\t");
p("\t⑥新增客戶\t");
p("\t⑦檢視客戶列表\t");
p("\t⑧刪除指定id的客戶\t");
p("\t⑨訂單列表顯示\t");
p("\t⑩根據訂單id修改訂單狀態\t");
p("\t⑪退出\t");
p("請輸入數字1~11，分別使用相應的功能");
Scanner sc = new Scanner(System.in);
switch (sc.nextInt()) {
case 1:
p("請按照順序輸入：菜品id/菜品名/菜品型別/上架時間/單價/月銷售/總數量");
menu.insert(new Menu(sc.next(), sc.next(), sc.next(), new Date(), sc.nextDouble(), sc.nextInt(), sc.nextInt()));
administratorPanel();
break;
case 2:
p("請輸入需要查詢的頁數");
int pageNow = sc.nextInt();
p("請輸入需要查詢的頁面資料條數");
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("請輸入菜品類別");
String type = sc.nextLine();
menu.findByType(type).stream()
.forEach(System.out::println);
administratorPanel();
break;
case 4:
p("請輸入菜品id和修改後的菜品價格");
String mid = sc.next();
double price = sc.nextDouble();
menu.replacePrice(mid, price);
administratorPanel();
break;
case 5:
p("請輸入要刪除菜品的id");
String mid2 = sc.next();
menu.delete(mid2);
administratorPanel();
break;
case 6:
p("新增客戶,請按照順序輸入客戶資訊：客戶id，客戶名，性別，密碼，送餐地址，手機號，建立時間");
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("請輸入要刪除客戶的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("請根據訂單id修改訂單狀態orderStatus");
p("請輸入訂單id");
String no = sc.next();
p("請輸入要修改的訂單狀態（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使用者系統皮膚\t");
p("\t①顯示所有菜品(按菜品銷量從高到低排序輸出)\t");
p("\t②根據菜品類別顯示所有菜品\t");
p("\t③檢視所有訂單(當前登入使用者的)\t");
p("\t④修改密碼（當前登入使用者的）\t");
p("\t⑤個人資訊顯示\t");
p("\t⑥退出登入\t");
p("請輸入數字1~6，分別使用相應的功能");
MenuManager menu = new MenuManager();
Scanner sc = new Scanner(System.in);
switch (sc.nextInt()) {
case 1:
//顯示所有菜品(按菜品銷量從高到低排序輸出)
menu.findAll().stream()
.forEach(System.out::println);
p("請輸入菜品id");
String mid = sc.next();
p("請輸入購買數量");
int buyNumber = sc.nextInt();
//修改菜品總數
menu.replaceTotalQuantity(mid, buyNumber);
//查詢菜品價格
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("請輸入修改後的密碼");
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("請輸入id");
String id = sc.nextLine();
p("請輸入密碼");
String password = sc.nextLine();
if(am.map.get(id) != null && am.map.get(id).getPassword().equals(password)) {
p("管理員登入成功");
administratorPanel();
} else if(cm.map.get(id) != null && cm.map.get(id).getPassword().equals(password)) {
p("客戶登入成功");
clientPanel(cm.map.get(id));
} else {
p("登入失敗，請重新登入");
login();
}
}
public static void main(String[] args) {
login();
}
}
最後
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