java模拟实现银行ATM机操作（java基础简单实现atm机）

java模拟银行ATM机操作（基础版），供大家参考，具体内容如下

实现的功能需求：

修改密码之后，就会自动退出登录，再重新登录，若登录成功才能验证修改密码成功，这里用到 【跳出指定循环】, 其他功能都是基本操作，作为入门入手程序。

准备两个实体类（一个银行类，一个用户类），一个测试类，注意，这里暂且存储了两个用户，这里可以优化，暂且不优化了

Blank.java

package com.demo2;

public class Blank {

/*数组模拟数据库后台,并初始化*/

private User[] users = new User[20];

int size;

/*接收当前登录的用户*/

User user;

public User getUser() {

return user;

}

public Blank (){ }

/*初始化用户*/

public void init(){

User user1= new User("890012","43042419990201","刘军","7519","15116497809","18000");

User user2= new User("890013","43042419990821","一凡","1314","118842320","13000");

/*初始化*/

users[0] = user1;

users[1] =user2;

size=2;

}

/*用户登录*/

public boolean login(String cardNo, String passwd){

for(int i=0; i

if(users[i].getCardNo().equals(cardNo) && users[i].getPasswd().equals(passwd) ){

user = users[i];

return true;

}

}

return false;

}

/*存款*/

public void save(String balance){

int money =Integer.parseInt(user.getBalance());

money += Integer.parseInt(balance);

user.setBalance((money+""));

System.out.println("存款成功");

}

/*取款*/

public void widthDraw(String balance){

int money =Integer.parseInt(user.getBalance());

money -= Integer.parseInt(balance);

user.setBalance((money+""));

}

/*转账*/

public void trans(String cardNo,String balance){

int i=0;

for(i=0; i

if(users[i].getCardNo().equals(cardNo)){

/*保存没转账之前的数*/

int oldmoney =Integer.parseInt(user.getBalance()) ;

int oldanothermoney = Integer.parseInt(users[i].getBalance());

/*转账，调用当前登录用户的取款方法*/

widthDraw(balance);

/*目标账户的余额变化*/

int money =Integer.parseInt(users[i].getBalance());

money += Integer.parseInt(balance);

users[i].setBalance((money+""));

/*这里做转账成功的判断*/

int userseflmoney =oldmoney - Integer.parseInt(user.getBalance());

int useraothermoney = Integer.parseInt(users[i].getBalance())-oldanothermoney;

if(userseflmoney == useraothermoney){

System.out.println("转账成功");

}

break;

}

}

if(i>=size){

System.out.println("输入的卡号有误");

}

}

/*查询余额*/

public void query(){

System.out.println("【账户余额】: "+user.getBalance());

}

/*修改密码*/

public void modifyPassword(String passwd){

user.setPasswd(passwd);

System.out.println("修改密码成功，请重新登录");

}

}

User.java

package com.demo2;

public class User {

private String cardNo ;

private String identity;

private String username;

private String passwd;

private String phone;

private String balance;

public User(){}

public User(String cardNo, String identity, String username, String passwd, String phone, String balance) {

this.cardNo = cardNo;

this.identity = identity;

this.username = username;

this.passwd = passwd;

this.phone = phone;

this.balance = balance;

}

public String getCardNo() {

return cardNo;

}

public void setCardNo(String cardNo) {

this.cardNo = cardNo;

}

public String getIdentity() {

return identity;

}

public void setIdentity(String identity) {

this.identity = identity;

}

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

public String getPasswd() {

return passwd;

}

public void setPasswd(String passwd) {

this.passwd = passwd;

}

public String getPhone() {

return phone;

}

public void setPhone(String phone) {

this.phone = phone;

}

public String getBalance() {

return balance;

}

public void setBalance(String balance) {

this.balance = balance;

}

}

BlankTest.java

package com.demo2;

import java.util.Scanner;

public class BankTest {

public static void main(String[] args) {

Blank blank = new Blank();

/*初始化*/

blank.init();

Scanner sc =new Scanner(System.in);

while(true) {

System.out.println("========== 中国银行欢迎你 ========= ");

System.out.println(" 【请先登录】 ");

System.out.print("【请输入卡号】:");

String carNo = sc.next();

System.out.print("【请输入密码】:");

String passwd = sc.next();

if (blank.login(carNo, passwd)) {

System.out.println("登录成功： 【账号：欢迎】:"+ blank.getUser().getUsername());

// User user = blank.getUser();

prof: while(true) {

System.out.println("========== 1，【存款】 2，【取款】 3，【转账】 ========= ");

System.out.println("========== 4，【查询余额】 5，【修改密码】 6，【退出】 ========= ");

System.out.print("【请选择业务功能】：");

int num = sc.nextInt();

if (num == 1) {

System.out.println("【进入存款操作】");

System.out.print("【输入存款金额】:");

int money = sc.nextInt();

while (true) {

if (money <= 0) {

System.out.println("【请输入正确的存款金额】");

} else {

break;

}

}

blank.save(money + "");

} else if (num == 2) {

System.out.println("【进入取款操作】");

System.out.print("【输入取款金额】:");

int money = sc.nextInt();

blank.widthDraw(money+"");

System.out.println("取款成功");

} else if (num == 3) {

System.out.println("【进入转账操作】");

System.out.print("【输入转账卡号】:");

String cardNo =sc.next();

System.out.print("【输入转款金额】");

int money = sc.nextInt();

blank.trans(cardNo, money+"");

} else if (num == 4) {

blank.query();

} else if (num == 5) {

System.out.println("【进入改密操作】");

System.out.print("【输入重置密码】:");

String newpasswd =sc.next();

blank.modifyPassword(newpasswd);

break proMQmhrxHCGf;

} else if (num == 6) {

System.out.println("【账号】: 退出成功");

break prof;

}

}

} else {

System.out.println("卡号或者密码输入不正确");

}

}

}

}

程序运行结果：

if(users[i].getCardNo().equals(cardNo) && users[i].getPasswd().equals(passwd) ){

user = users[i];

return true;

}

}

return false;

}

/*存款*/

public void save(String balance){

int money =Integer.parseInt(user.getBalance());

money += Integer.parseInt(balance);

user.setBalance((money+""));

System.out.println("存款成功");

}

/*取款*/

public void widthDraw(String balance){

int money =Integer.parseInt(user.getBalance());

money -= Integer.parseInt(balance);

user.setBalance((money+""));

}

/*转账*/

public void trans(String cardNo,String balance){

int i=0;

for(i=0; i

if(users[i].getCardNo().equals(cardNo)){

/*保存没转账之前的数*/

int oldmoney =Integer.parseInt(user.getBalance()) ;

int oldanothermoney = Integer.parseInt(users[i].getBalance());

/*转账，调用当前登录用户的取款方法*/

widthDraw(balance);

/*目标账户的余额变化*/

int money =Integer.parseInt(users[i].getBalance());

money += Integer.parseInt(balance);

users[i].setBalance((money+""));

/*这里做转账成功的判断*/

int userseflmoney =oldmoney - Integer.parseInt(user.getBalance());

int useraothermoney = Integer.parseInt(users[i].getBalance())-oldanothermoney;

if(userseflmoney == useraothermoney){

System.out.println("转账成功");

}

break;

}

}

if(i>=size){

System.out.println("输入的卡号有误");

}

}

/*查询余额*/

public void query(){

System.out.println("【账户余额】: "+user.getBalance());

}

/*修改密码*/

public void modifyPassword(String passwd){

user.setPasswd(passwd);

System.out.println("修改密码成功，请重新登录");

}

}

User.java

package com.demo2;

public class User {

private String cardNo ;

private String identity;

private String username;

private String passwd;

private String phone;

private String balance;

public User(){}

public User(String cardNo, String identity, String username, String passwd, String phone, String balance) {

this.cardNo = cardNo;

this.identity = identity;

this.username = username;

this.passwd = passwd;

this.phone = phone;

this.balance = balance;

}

public String getCardNo() {

return cardNo;

}

public void setCardNo(String cardNo) {

this.cardNo = cardNo;

}

public String getIdentity() {

return identity;

}

public void setIdentity(String identity) {

this.identity = identity;

}

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

public String getPasswd() {

return passwd;

}

public void setPasswd(String passwd) {

this.passwd = passwd;

}

public String getPhone() {

return phone;

}

public void setPhone(String phone) {

this.phone = phone;

}

public String getBalance() {

return balance;

}

public void setBalance(String balance) {

this.balance = balance;

}

}

BlankTest.java

package com.demo2;

import java.util.Scanner;

public class BankTest {

public static void main(String[] args) {

Blank blank = new Blank();

/*初始化*/

blank.init();

Scanner sc =new Scanner(System.in);

while(true) {

System.out.println("========== 中国银行欢迎你 ========= ");

System.out.println(" 【请先登录】 ");

System.out.print("【请输入卡号】:");

String carNo = sc.next();

System.out.print("【请输入密码】:");

String passwd = sc.next();

if (blank.login(carNo, passwd)) {

System.out.println("登录成功： 【账号：欢迎】:"+ blank.getUser().getUsername());

// User user = blank.getUser();

prof: while(true) {

System.out.println("========== 1，【存款】 2，【取款】 3，【转账】 ========= ");

System.out.println("========== 4，【查询余额】 5，【修改密码】 6，【退出】 ========= ");

System.out.print("【请选择业务功能】：");

int num = sc.nextInt();

if (num == 1) {

System.out.println("【进入存款操作】");

System.out.print("【输入存款金额】:");

int money = sc.nextInt();

while (true) {

if (money <= 0) {

System.out.println("【请输入正确的存款金额】");

} else {

break;

}

}

blank.save(money + "");

} else if (num == 2) {

System.out.println("【进入取款操作】");

System.out.print("【输入取款金额】:");

int money = sc.nextInt();

blank.widthDraw(money+"");

System.out.println("取款成功");

} else if (num == 3) {

System.out.println("【进入转账操作】");

System.out.print("【输入转账卡号】:");

String cardNo =sc.next();

System.out.print("【输入转款金额】");

int money = sc.nextInt();

blank.trans(cardNo, money+"");

} else if (num == 4) {

blank.query();

} else if (num == 5) {

System.out.println("【进入改密操作】");

System.out.print("【输入重置密码】:");

String newpasswd =sc.next();

blank.modifyPassword(newpasswd);

break proMQmhrxHCGf;

} else if (num == 6) {

System.out.println("【账号】: 退出成功");

break prof;

}

}

} else {

System.out.println("卡号或者密码输入不正确");

}

}

}

}

程序运行结果：

if(users[i].getCardNo().equals(cardNo)){

/*保存没转账之前的数*/

int oldmoney =Integer.parseInt(user.getBalance()) ;

int oldanothermoney = Integer.parseInt(users[i].getBalance());

/*转账，调用当前登录用户的取款方法*/

widthDraw(balance);

/*目标账户的余额变化*/

int money =Integer.parseInt(users[i].getBalance());

money += Integer.parseInt(balance);

users[i].setBalance((money+""));

/*这里做转账成功的判断*/

int userseflmoney =oldmoney - Integer.parseInt(user.getBalance());

int useraothermoney = Integer.parseInt(users[i].getBalance())-oldanothermoney;

if(userseflmoney == useraothermoney){

System.out.println("转账成功");

}

break;

}

}

if(i>=size){

System.out.println("输入的卡号有误");

}

}

/*查询余额*/

public void query(){

System.out.println("【账户余额】: "+user.getBalance());

}

/*修改密码*/

public void modifyPassword(String passwd){

user.setPasswd(passwd);

System.out.println("修改密码成功，请重新登录");

}

}

User.java

package com.demo2;

public class User {

private String cardNo ;

private String identity;

private String username;

private String passwd;

private String phone;

private String balance;

public User(){}

public User(String cardNo, String identity, String username, String passwd, String phone, String balance) {

this.cardNo = cardNo;

this.identity = identity;

this.username = username;

this.passwd = passwd;

this.phone = phone;

this.balance = balance;

}

public String getCardNo() {

return cardNo;

}

public void setCardNo(String cardNo) {

this.cardNo = cardNo;

}

public String getIdentity() {

return identity;

}

public void setIdentity(String identity) {

this.identity = identity;

}

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

public String getPasswd() {

return passwd;

}

public void setPasswd(String passwd) {

this.passwd = passwd;

}

public String getPhone() {

return phone;

}

public void setPhone(String phone) {

this.phone = phone;

}

public String getBalance() {

return balance;

}

public void setBalance(String balance) {

this.balance = balance;

}

}

BlankTest.java

package com.demo2;

import java.util.Scanner;

public class BankTest {

public static void main(String[] args) {

Blank blank = new Blank();

/*初始化*/

blank.init();

Scanner sc =new Scanner(System.in);

while(true) {

System.out.println("========== 中国银行欢迎你 ========= ");

System.out.println(" 【请先登录】 ");

System.out.print("【请输入卡号】:");

String carNo = sc.next();

System.out.print("【请输入密码】:");

String passwd = sc.next();

if (blank.login(carNo, passwd)) {

System.out.println("登录成功： 【账号：欢迎】:"+ blank.getUser().getUsername());

// User user = blank.getUser();

prof: while(true) {

System.out.println("========== 1，【存款】 2，【取款】 3，【转账】 ========= ");

System.out.println("========== 4，【查询余额】 5，【修改密码】 6，【退出】 ========= ");

System.out.print("【请选择业务功能】：");

int num = sc.nextInt();

if (num == 1) {

System.out.println("【进入存款操作】");

System.out.print("【输入存款金额】:");

int money = sc.nextInt();

while (true) {

if (money <= 0) {

System.out.println("【请输入正确的存款金额】");

} else {

break;

}

}

blank.save(money + "");

} else if (num == 2) {

System.out.println("【进入取款操作】");

System.out.print("【输入取款金额】:");

int money = sc.nextInt();

blank.widthDraw(money+"");

System.out.println("取款成功");

} else if (num == 3) {

System.out.println("【进入转账操作】");

System.out.print("【输入转账卡号】:");

String cardNo =sc.next();

System.out.print("【输入转款金额】");

int money = sc.nextInt();

blank.trans(cardNo, money+"");

} else if (num == 4) {

blank.query();

} else if (num == 5) {

System.out.println("【进入改密操作】");

System.out.print("【输入重置密码】:");

String newpasswd =sc.next();

blank.modifyPassword(newpasswd);

break proMQmhrxHCGf;

} else if (num == 6) {

System.out.println("【账号】: 退出成功");

break prof;

}

}

} else {

System.out.println("卡号或者密码输入不正确");

}

}

}

}

程序运行结果：

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