经典案例题：ATM取款机详细代码---复制既能跑
本文介绍了Java经典案例题供小白编程爱好者借鉴，因为我也是学习者，这是我的一点编程经验和心得，如有错误，请指出。废话不多说，开始步入正题。（ps:创作不易，有喜欢的小伙伴请点赞支持，谢谢啦！）
这里写目录标题
- 一、所需知识
- 二、需求及技术
- 三、代码
-
- 1. 实体类：Account
- 2. 服务层：AccountService
- 3. 视图层：AccountService
- 4. 测试类：Test
- 5. 结果截图
一、所需知识
此系统要求掌握知识点大致如下：
1、掌握控制台项目的开发流程
2、了解项目所需的技术
3、熟悉项目需实现的功能
3、掌握项目登陆注册的功能实现
4、掌握项目余额的功能实现
5、掌握项目存款转账的功能实现
6、掌握项目分层实现
二、需求及技术
需求： ATM系统是一个基于JAVA SE的控制台版本的综合项目，具有登录、注册、余额、存款、退出以及转账功能。
技术：- JAVA基础 - 面向对象 - 分层
三、代码
分析：分层：实体类层-Jopo -----服务层-service------视图层-view-------测试-test
通俗点说，就是创建三个包对应上面三个层，以下就是下面三个包的具体代码
1. 实体类：Account
/*
账户实体类
*/
public class Account {
private String uname; //用户名
private String pwd; //密码
private int idcard; //卡号
private double blance; //余额
public Account() {
}
public Account(String uname, String pwd, int idcard, double blance) {
this.uname = uname;
this.pwd = pwd;
this.idcard = idcard;
this.blance = blance;
}
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
public int getIdcard() {
return idcard;
}
public void setIdcard(int idcard) {
this.idcard = idcard;
}
public double getBlance() {
return blance;
}
public void setBlance(double blance) {
this.blance = blance;
}
@Override
public String toString() {
return "Account{" +
"uname='" + uname + '\'' +
", pwd='" + pwd + '\'' +
", idcard=" + idcard +
", blance=" + blance +
'}';
}
@Override
public boolean equals(Object o) {
if (o instanceof Account){
if (((Account) o).getUname().equals(uname)){
return true;
}
return false;
}
return false;
}
@Override
public int hashCode() {
return 0;
}
}
2. 服务层：AccountService
import com.yb.item.jopo.Account;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Random;
/*
账户服务层、逻辑判断
*/
public class AccountService {
private static Account account = new Account();
private static double b = 0;
//数据存储
private static HashSet<Account> al = new HashSet<Account>();
//注册
public static void register(Account accounts){
boolean rs = al.add(accounts);
if (rs){
System.out.println("注册成功");
//生成一个随机卡号
int card = createCard();
accounts.setIdcard(card);
account = accounts;
System.out.println(account);
}else{
System.out.println("注册失败");
}
}
//登录
public static boolean login(Account account){
Iterator<Account> iterator = al.iterator();
while (iterator.hasNext()){
Account next = iterator.next();
if (account.getIdcard()==next.getIdcard()){
if (account.getPwd().equals(next.getPwd())){
System.out.println("登录成功");
account=next;
b = next.getBlance();
System.out.println(next);
return true;
}else{
System.out.println("密码错误...");
return false;
}
}
if (account.getIdcard()==next.getIdcard()){
System.out.println("卡号错误...");
return false;
}
}
return false;
}
//存款
public static void deposit(double money){
if (money>0){
b = account.getBlance()+money;
account.setBlance(b);
}else {
System.out.println("你这给我卡Bug呢！！");
}
}
//查询余额
public static void CheckBalance(){
System.out.println("您的余额为:"+b);
}
//转账
public static void carryOver(int id,double money){
Iterator<Account> iterator = al.iterator();
while (iterator.hasNext()){
Account next = iterator.next();
if (next.getIdcard()==id){
if (money>account.getBlance()){
System.out.println("转账失败...");
}else{
//自己的钱减少
b=account.getBlance()-money;
account.setBlance(b);
//他的钱变多
b = next.getBlance()+money;
next.setBlance(b);
}
System.out.println("您转入的账户："+next.getUname()+",余额为："+next.getBlance());
//将账户重新赋值
b = next.getBlance();
}
}
System.out.println("您的账户余额为："+account.getBlance());
}
//取款
public static void getMoney(double money){
if (account.getBlance()>=money&&money>0&&account.getBlance()>=0){
account.setBlance(account.getBlance()-money);
System.out.println("取款成功，当前余额为："+account.getBlance());
}else {
System.out.println("取款失败");
}
}
//自动生成银行卡号
public static int createCard(){
Random random = new Random();
//可以追加判断，如果重复生成，则重新生成一个随机卡号
int num = random.nextInt(100000000)+999999999;
return num;
}
}
3. 视图层：AccountService
import com.yb.item.jopo.Account;
import com.yb.item.service.AccountService;
import java.util.Scanner;
public class AccountView {
private static Scanner scanner = new Scanner(System.in);
private static AccountService as = new AccountService();
private static AccountView av = new AccountView();
//菜单
public static void menu(String[] a){
System.out.println("--------------------------------------------------------------");
for (int i = 0; i <= a.length-1; i++) {
System.out.print((i+1)+","+a[i]+" ");
}
System.out.println();
System.out.println("--------------------------------------------------------------");
}
//获取对象
public static void getUser(){
}
//首页
public static void index(){
//new String[]{"注册","登录","存款","余额","转账","取款","退出"}
while (true) {
menu(new String[]{
"注册","登录","退出"});
System.out.println("请输入您的操作：");
int num = scanner.nextInt();
switch (num){
case 1:
//注册
System.out.println("请输入您的姓名：");
String username = scanner.next();
System.out.println("请输入您的密码：");
String password = scanner.next();
as.register(new Account(username,password,0,0));
break;
case 2:
//登录
System.out.println("请输入您的卡号：");
int id = scanner.nextInt();
System.out.println("请输入您的密码：");
String pwd = scanner.next();
boolean login = as.login(new Account("", pwd, id, 0));
while (login) {
menu(new String[]{
"存款","余额","转账","取款","退出"});
System.out.println("请输入您的操作：");
int i = scanner.nextInt();
switch (i) {
case 1:
//存款
System.out.println("请输入要存的金额：");
double mon = scanner.nextDouble();
as.deposit(mon);
break;
case 2:
//查询余额
as.CheckBalance();
break;
case 3:
//转账
System.out.println("请输入要转入账户：");
int id1 = scanner.nextInt();
System.out.println("请输入要转入的金额：");
double mon1 = scanner.nextDouble();
as.carryOver(id1,mon1);
break;
case 4:
//取款
System.out.println("请输入您要取出的金额：");
double mon2 = scanner.nextDouble();
as.getMoney(mon2);
break;
case 5:
//退出
login=false;
}
}
continue;
case 3:
System.exit(0);
}
}
}
}
4. 测试类：Test
public static void main(String[] args) {
av.index();
}
5. 结果截图
以上就是这个ATM取款系统的的整体流程，有喜欢的朋友可以帮忙点个赞，谢谢！