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