前言介绍:

最近很多同学找我帮忙做一些课程设计或Web前端大作业、其中控制台项目应该是初学者必须经历的一个过程、作为java初学者这个控制台版本的模拟ATM银行管理系统十分合适、用到的技术也是最简单的JavaList集合、变量的声明、对象的创建、一些基本的while语句、switch语句、循环遍历等基础语法。一个最基础版本的控制台模拟ATM银行管理系统也就是CRUD功能、直接上完整代码

创建抽象类Card类

abstract class Card {
int cardId;

public Card() {
super();
}
public Card(int cardId) {
super();
this.cardId = cardId;
}
public abstract String getCardId();
public abstract void setCardId(int cardId);

}

 创建普通银行类继承Card

public class CommonCard extends Card{
public CommonCard() {
super();
}
public CommonCard(int cardId) {
super();
this.cardId = cardId;
}
@Override
public String getCardId() {
return "普通银行卡卡号为:"+cardId;
}
@Override
public void setCardId(int cardId) {
this.cardId = cardId;
}

}

创建普通信用卡继承Card

package com.railway.modules.base.test;
public class CreditCard extends Card{
public CreditCard() {
super();
}
public CreditCard(int cardId) {
super(cardId);
}
@Override
public String getCardId() {
return "信用卡卡号为:"+cardId;
}
@Override
public void setCardId(int cardId) {
this.cardId = cardId;
}
}

创建普通医保卡继承Card

package com.railway.modules.base.test;
public class MedicalInsuranceCard extends Card{
public MedicalInsuranceCard() {
super();
}
public MedicalInsuranceCard(int cardId) {
super(cardId);
}
@Override
public String getCardId() {
return "医保卡卡号为:"+cardId;
}
@Override
public void setCardId(int cardId) {
this.cardId = cardId;
}

}

ATM主要方法业务类逻辑实现

package com.railway.modules.base.test;
import java.util.Scanner;
public class ATM {
Scanner input = new Scanner(System.in);
private User[] user=new User[100];
User atm = new User();
private User usr;
private int accountId = 1;
private Card card;

public void Select() {

while(true) {
System.out.println("=======ATM管理系统=======");
System.out.print("1.开户\n2.登录\n3.取款\n4.存款\n5.余额查询\n6.修改密码\n7.查看用户信息\n8.退出登录\n9.退出系统\n请选择需要选择的项目:");
switch(input.nextInt()) {
case 1:
setAccount(); //开户
break;
case 2:
usr=userLogin(); //登录
break;
case 3:
drawMoney(); //取款
break;
case 4:
depositMoney(); //存款
break;
case 5:
showBalance(); //余额查询
break;
case 6:
revisePassword(); //修改密码
break;
case 7:
lookAccount(); //查看用户信息
break;
case 8:
cancel();//退出登录
break;
case 9:
System.out.println("=======================");
System.out.println("欢迎下次登录该系统!"); //退出系统
System.exit(0);
break;
default:
System.out.println("=======================");
System.out.println("输入错误!请重新输入!");
break;
}
}
}


public void setAccount(){ //开户
if (usr!=null) {
System.out.println("=======================");
System.out.println("请先退出上一个账户!");
}
else{
boolean x = true;
while(x) {
System.out.println("=======================");
System.out.print("1.普通银行卡\n2.信用卡\n3.医保卡\n0.返回\n请选择开户类型:");
switch(input.nextInt()) {
case 1:
card = new CommonCard();
card.setCardId(accountId);
x=false;
break;
case 2:
card = new CreditCard();
card.setCardId(accountId);
x=false;
break;
case 3:
card = new MedicalInsuranceCard();
card.setCardId(accountId);
x=false;
break;
case 0:
Select();
default:
System.out.println("=======================");
System.out.println("输入错误!请重新输入!");
break;
}
}

System.out.print("请输入姓名:");
String name=input.next();
System.out.print("请输入性别:");
String sex=input.next();
System.out.print("请输入年龄:");
String age=input.next();
System.out.print("请输入身份证号:");
String ID=input.next();
System.out.print("请输入银行卡要设置的密码:");
String password1=input.next();
System.out.print("请再次输入密码:");
String password2=input.next();
if(password1.equals(password2)){
user[accountId]=new User(name,sex,age,password1,ID,0,card);
System.out.println("=======================");
System.out.println("开户成功!你的卡号为:"+accountId);
accountId++;
}
else {
System.out.println("=======================");
System.out.println("两次密码不同!请重新开始!");
}
}

}

public User userLogin(){ //登录
if (usr!=null) {
System.out.println("=======================");
System.out.println("请先退出上一个账户!");
return usr;
}
else{
System.out.print("请输入卡号:");
int aId=input.nextInt();
System.out.print("请输入密码:");
String password=input.next();
for(int i=0;i<user.length;i++){
if (user[i]!=null) {
if (aId==user[i].getCard()&&password.equals(user[i].getPassword())) {
System.out.println("=======================");
System.out.println(user[i].getName()+",欢迎登录!");
return user[i];
}
}
}
System.out.println("=======================");
System.out.println("卡号或密码有误");
return null;
}
}


public void drawMoney(){ //取款
if(usr==null){
System.out.println("=======================");
System.out.println("请先登录账户!");
}
else{
System.out.print("请输入取款金额:");
double blc=input.nextDouble();
while(blc>usr.getBalance()) {
System.out.println("=======================");
System.out.print("取款金额大于余额,请重新输入取款金额:");
blc=input.nextDouble();
}
while(blc<=0){
System.out.println("=======================");
System.out.print("取款金额错误,请重新输入取款金额:");
blc=input.nextDouble();
}
usr.setBalance(usr.getBalance()-blc);
System.out.println("=======================");
System.out.println("取款成功!");
System.out.println("账户余额:"+usr.getBalance());

}
}

public void depositMoney(){ //存款
if(usr==null){
System.out.println("=======================");
System.out.println("请先登录账户!");
}
else{
System.out.print("请输入存款金额:");
double dsm=input.nextDouble();
while(dsm<=0){
System.out.println("=======================");
System.out.print("输入金额错误,请重新输入:");
dsm=input.nextDouble();
}
usr.setBalance(usr.getBalance()+dsm);
System.out.println("=======================");
System.out.println("存款成功!");
System.out.println("账户余额:"+usr.getBalance());
}
}

public void showBalance(){ //余额查询
if(usr==null){
System.out.println("=======================");
System.out.println("请先登录账户!");
}
else{
System.out.println("=======================");
System.out.println("账户余额:"+usr.getBalance());
}
}

public void revisePassword(){ //修改密码
if(usr==null){
System.out.println("=======================");
System.out.println("请先登录账户!");
}
else{
System.out.print("请输入原密码:");
String password=input.next();
for(int i=2;i>=0;i--) {
if(password.equals(usr.getPassword()))
break;
if(i==0) {
System.out.println("三次密码输入错误!即将退出账户!");
cancel();
Select();
}
System.out.println("密码错误!你还有"+i+"次机会!");
System.out.print("请输入原密码:");
password=input.next();
}
System.out.print("验证成功,请输入新密码:");
String password1=input.next();
System.out.print("请再次输入密码:");
String password2=input.next();
while(!password1.equals(password2)) {
System.out.println("=======================");
System.out.print("两次密码不同,请重新输入新密码:");
password1=input.next();
System.out.print("请再次输入密码:");
password2=input.next();
}
usr.setPassword(password1);
System.out.println("=======================");
System.out.println("修改成功!");
}
}

public void lookAccount() { //查看用户信息
if(usr==null){
System.out.println("=======================");
System.out.println("请先登录账户!");
}
else{
System.out.println("=======================");
System.out.println("姓名:"+usr.getName());
System.out.println("性别:"+usr.getSex());
System.out.println(usr.getCardId());
System.out.println("身份证号:"+usr.getID());
System.out.println("余额:"+usr.getBalance());
}
}

public void cancel() {
if(usr==null){
System.out.println("=======================");
System.out.println("请先登录账户!");
}
else{
usr=null;
System.out.println("=======================");
System.out.println("账户退出成功!");
}
}
}

main方法测试启动类

public class TestATM {
public static void main(String[] args) {
ATM atm = new ATM();
atm.Select();
}
}

 控制台打印:

=======ATM管理系统=======
1.开户
2.登录
3.取款
4.存款
5.余额查询
6.修改密码
7.查看用户信息
8.退出登录
9.退出系统
请选择需要选择的项目:1
=======================
1.普通银行卡
2.信用卡
3.医保卡
0.返回
请选择开户类型:1
请输入姓名:admin
请输入性别:男
请输入年龄:22
请输入身份证号:513922199555555555
请输入银行卡要设置的密码:123456
请再次输入密码:123456
=======================
开户成功!你的卡号为:1
=======ATM管理系统=======
1.开户
2.登录
3.取款
4.存款
5.余额查询
6.修改密码
7.查看用户信息
8.退出登录
9.退出系统
请选择需要选择的项目:
2
请输入卡号:1
请输入密码:123456
=======================
admin,欢迎登录!
=======ATM管理系统=======
1.开户
2.登录
3.取款
4.存款
5.余额查询
6.修改密码
7.查看用户信息
8.退出登录
9.退出系统
请选择需要选择的项目:

很基础、 适合java初学者来进行练习以及当做课程作业来使用