目录
1.JavaBean搭建
package com.cn.bamboo;
import java.util.Objects;
public class Account {
private String cardId;
private String userName;
private String passwords;
private Double money;
private Double quota;
public Account() {
}
public Account(String cardId, String userName, String passwords, Double money, Double quota) {
this.cardId = cardId;
this.userName = userName;
this.passwords = passwords;
this.money = money;
this.quota = quota;
}
public Account(String cardId, String userName, String passwords, Double quota) {
this.cardId = cardId;
this.userName = userName;
this.passwords = passwords;
this.quota = quota;
}
{
this.money = 0.0;
}
public String getCardId() {
return cardId;
}
public void setCardId(String cardId) {
this.cardId = cardId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPasswords() {
return passwords;
}
public void setPasswords(String passwords) {
this.passwords = passwords;
}
public Double getMoney() {
return money;
}
public void setMoney(Double money) {
this.money = money;
}
public Double getQuota() {
return quota;
}
public void setQuota(Double quota) {
this.quota = quota;
}
@Override
public String toString() {
return "cardId = " + cardId + ' ' +
", userName = " + userName + ' ' +
", passwords = " + passwords + ' ' +
", money = " + money + '$' +
", quota = " + quota + '$';
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Account account = (Account) o;
return Objects.equals(cardId, account.cardId);
}
@Override
public int hashCode() {
return Objects.hash(cardId);
}
}
2.ATMSystem.java
package com.cn.bamboo;
import java.util.*;
public class AMTSystem {
public static void main(String[] args) {
Set<Account> accountsData = new HashSet<>();
/* accountsData.add(new Account("10101","bamboo","123456",13156413.0,50000.0));
accountsData.add(new Account("10102","dragon","123456",0.0,50000.0));*/
Scanner sc = new Scanner(System.in);
System.out.println("===========================Welcome to the BambooBank ATM system===========================");
while (true) {
try {
System.out.println("1.Login account");
System.out.println("2.Register account");
System.out.println("3.Exit");
System.out.print("Please input 1|2|3 choose operate:");
int command = sc.nextInt();
switch (command) {
case 3:
System.out.println("Welcome to next time.");
return;
case 2:
SysUtils.register(accountsData, sc);
break;
case 1:
SysUtils.login(accountsData, sc);
break;
default:
System.out.println("Without this option.");
break;
}
}catch (InputMismatchException e){
sc.nextLine();
System.out.println("Input error!");
}
}
}
}
3.工具类框架搭建
import java.util.*;
public class SysUtils {
private SysUtils() {
}
}3.1 注册
public static void register(Set<Account> accountSet, Scanner sc) {
while (true) {
System.out.print("Please enter your real name:");
String name = sc.next();
System.out.print("Enter your password:");
String pwd = sc.next();
System.out.print("Please enter your password again:");
String pwd1 = sc.next();
if (pwd.equals(pwd1)) {
String cardID = getRandomCardID(accountSet);
while (true) {
System.out.print("Please set the transfer limit:");
try {
Double quota = sc.nextDouble();
Account account = new Account(cardID, name, pwd, quota);
boolean b = accountSet.add(account);
if (b) {
System.out.println("Creating a successful!");
System.out.println(account.getCardId());
return;
}
} catch (InputMismatchException e) {
sc.nextLine();
System.out.println("It can only be numbers!");
}
}
} else {
System.out.println("The passwords are inconsistent!");
}
}
}3.2 登陆
public static void login(Set<Account> accountSet, Scanner sc) {
if (accountSet.size() > 0) {
while (true) {
try {
System.out.print("Please enter your account ID:");
Long cardID = sc.nextLong();
sc.nextLine();
Account account = getAccountById(accountSet, cardID.toString());
if (account != null) {
System.out.print("Please enter password:");
String passwords = sc.nextLine();
if (account.getPasswords().equals(passwords)) {
System.out.println("land successfully!");
showCommand(account, accountSet, sc);
return;
}
} else {
System.out.println("The empty card!");
}
} catch (InputMismatchException e) {
sc.nextLine();
System.out.println("The input does not match!");
}
}
} else {
System.out.println("ATM System is empty.");
}
}3.3 功能界面
private static void showCommand(Account account, Set<Account> accountSet, Scanner sc) {
System.out.println(account.getUserName() + "VIP " + "welcome you login system,your card id:" + account.getCardId());
System.out.println("=================Welcome you login BambooBank operation page is displayed=================");
while (true) {
try {
System.out.println("1.query");
System.out.println("2.deposit");
System.out.println("3.withdrawal");
System.out.println("4.transfer accounts");
System.out.println("5.change password");
System.out.println("6.Change limit");
System.out.println("7.unregister current account");
System.out.println("8.exit");
System.out.print("You can continue select functions to operate:");
int command = sc.nextInt();
switch (command) {
case 1:
queryAccount(account);
break;
case 2:
depositAccount(account, sc);
break;
case 3:
withdrawalAccount(account, sc);
break;
case 4:
transferAccount(account, accountSet, sc);
break;
case 5:
changePassword(account, sc);
break;
case 6:
changeQuota(account, sc);
break;
case 7:
unregisterAccount(account, accountSet, sc);
break;
case 8:
System.out.println("Welcome to use next time!");
return;
default:
System.out.println("Choose error.");
break;
}
} catch (InputMismatchException e) {
sc.nextLine();
System.out.println("Error in format!");
}
}
}
3.4 修改限额
private static void changeQuota(Account account, Scanner sc) {
try {
System.out.print("Please enter a new quota: ");
Double quota = sc.nextDouble();
if (quota > 0) {
account.setQuota(quota);
System.out.println("The modification succeeded.");
System.out.println("The current quota is : " + account.getQuota() + '$');
System.out.println("\n\n\n");
} else {
System.out.println("The amount cannot be less than or equal to 0 !");
}
} catch (InputMismatchException e) {
System.out.println("Not an amount unit!");
}
}
3.5 注销
private static void unregisterAccount(Account account, Set<Account> accountSet, Scanner sc) {
System.out.println("Confirm logout " + account.getCardId() + '?');
System.out.print("Please enter yes or no :");
String choose = sc.next();
switch (choose) {
case "yes":
accountSet.remove(account);
System.out.println("Successfully delete!");
System.exit(0);
break;
case "no":
break;
default:
System.out.println("Input error!");
break;
}
}
3.6 修改密码
private static void changePassword(Account account, Scanner sc) {
System.out.print("Please enter your current password: ");
String passwords = sc.next();
if (passwords.equals(account.getPasswords())) {
System.out.print("Please enter the new password: ");
String newPasswords = sc.next();
System.out.print("Enter the new password again: ");
String seNewPasswords = sc.next();
if (newPasswords.equals(seNewPasswords)) {
account.setPasswords(newPasswords);
System.out.println("Password changed successfully!");
System.out.println("\n\n\n");
} else {
System.out.println("The passwords are inconsistent!");
}
} else {
System.out.println("Wrong password!");
}
}
3.7 转账
private static void transferAccount(Account account, Set<Account> accountSet, Scanner sc) {
while (true) {
try {
System.out.print("Please enter the transfer ID:");
String transferID = sc.next();
Account transferAccount = getAccountById(accountSet, transferID);
if (transferAccount != null && !transferAccount.equals(account)) {
while (true) {
System.out.print("Please verify the name of the remitter:");
String name = sc.next();
if (name.equals(transferAccount.getUserName())) {
System.out.println("Your account balance is: " + String.format("%.2f", account.getMoney()) + '$');
System.out.println("Please enter the transfer amount:");
Double transferMoney = sc.nextDouble();
if (transferMoney > account.getMoney()) {
System.out.println("Not sufficient funds.");
} else {
if (transferMoney > account.getQuota()) {
System.out.println("Beyond the limit money!");
} else {
account.setMoney(account.getMoney() - transferMoney);
transferAccount.setMoney(transferAccount.getMoney() + transferMoney);
System.out.println("Transfer success!");
System.out.println("\n\n\n");
return;
}
}
} else {
sc.nextLine();
System.out.println("Check failure!");
}
}
} else {
System.out.println("The system does not have this account.");
}
} catch (InputMismatchException e) {
sc.nextLine();
System.out.println("Format error.");
}
}
}
3.8 取款
private static void withdrawalAccount(Account account, Scanner sc) {
while (true) {
try {
System.out.println("Your current account amount is: " + account.getMoney() + '$');
System.out.println("Please enter the amount you want to withdraw money: ");
Double withdrawalMoney = sc.nextDouble();
if (withdrawalMoney == 0) {
System.out.println("No withdrawal this time.");
return;
} else if (withdrawalMoney > 0) {
if (withdrawalMoney < account.getMoney()) {
account.setMoney(account.getMoney() - withdrawalMoney);
System.out.println("The withdrawal is successful.\nThe current balance is: " + String.format("%.2f", account.getMoney()) + '$');
System.out.println("\n\n\n");
return;
} else {
System.out.println("The account balance is insufficient, withdraw all.");
Double money = account.getMoney();
account.setMoney(0.0);
System.out.println("The withdrawal money is: " + String.format("%.2f", money) + '$');
System.out.println("The account balance is: " + String.format("%.2f", account.getMoney()) + '$');
System.out.println("\n\n\n");
return;
}
} else {
System.out.println("Format error, please re-enter.");
}
} catch (InputMismatchException e) {
sc.nextLine();
System.out.println("Just numbers!");
}
}
}
3.9 存款
private static void depositAccount(Account account, Scanner sc) {
while (true) {
try {
System.out.print("Please enter the deposit money:");
Double money = sc.nextDouble();
if (money <= 0) {
System.out.println("Amount input error!");
} else {
account.setMoney(account.getMoney() + money);
System.out.println("Deposit successfully!");
System.out.println("The current account balance is: " + String.format("%.2f", account.getMoney()) + '$');
System.out.println("\n\n\n");
return;
}
} catch (InputMismatchException e) {
sc.nextLine();
System.out.println("Just numbers!");
}
}
}
3.10 查询
private static void queryAccount(Account account) {
if (account != null) {
String pwd = passwordPrivacyProtection(account);
System.out.println("\n\n\n");
System.out.println("Account card ID: " + account.getCardId());
System.out.println("Account username: " + account.getUserName());
System.out.println("Account password: " + pwd);
System.out.println("Account money: " + String.format("%.2f", account.getMoney()) + '$');
System.out.println("Account quota money: " + String.format("%.2f", account.getQuota()) + '$');
System.out.println("\n\n\n");
} else {
System.out.println("Account is null.");
}
}
3.11 密码保护功能
private static String passwordPrivacyProtection(Account account) {
String pwd = "";
StringBuffer sb = new StringBuffer(pwd);
int len = account.getPasswords().length();
for (int i = 0; i < len; i++) {
sb.append('*');
}
pwd = sb.toString();
return pwd;
}
3.12 获取随机账户id
private static String getRandomCardID(Set<Account> accountSet) {
Random r = new Random();
String datas = "0123456789";
while (true) {
String cardID = "6217008888";
StringBuffer sb = new StringBuffer(cardID);
for (int i = 0; i < 6; i++) {
int ran = r.nextInt(10);
char ch = datas.charAt(ran);
sb.append(ch);
}
Account account = getAccountById(accountSet, sb.toString());
if (account == null) {
cardID = sb.toString();
return cardID;
}
}
}
3.13 根据id获取账户
private static Account getAccountById(Set<Account> accountSet, String cardID) {
Iterator<Account> i = accountSet.iterator();
while (i.hasNext()) {
Account account = i.next();
if (account.getCardId().equals(cardID)) {
return account;
}
}
return null;
}
