Java实现银行账户管理子系统（java简单银行管理系统）

本文实例为大家分享了java实现银行账户管理子系统的具体代码，供大家参考，具体内容如下

所用到的知识点：面向对象基础语法,封装，方法覆盖（重写）、继承、多态

话不多说，直接上代码

Account.java

package com.task1;

import java.util.Scanner;

public class Account {

//规定账户类型：

//0 – 储蓄账户 1 – 信用账户 2 – 可贷款储蓄账户 3– 可贷款信用账户

private Long id ;//账户号码

private String password;//账户密码

private String name;//真实姓名

private String personId;//身份证号码

private String email;//客户的电子邮箱

private double balance;//账户余额

private int type;//账户类型

//无参的构造方法

public Account(){

}

//有参的构造方法

public Account(long id, String password, String name, String personId, String email, double balance, int type) {

super();

this.id = id;

this.password = password;

this.name = name;

this.personId = personId;

this.email = email;

this.balance = balance;

this.type = type;

}

//get、set方法

public Long getId() {

return id;

}

public void setId(long id) {

this.id = id;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getPersonId() {

return personId;

}

public void setPersonId(String personId) {

this.personId = personId;

}

public String getEmail() {

return email;

}

public void setEmail(String email) {

this.email = email;

}

public double getBalance() {

return balance;

}

public void setBalance(double balance) {

this.balance = balance;

}

public int getType() {

return type;

}

public void setType(int type) {

this.type = type;

}

//存款

public Account deposit(double money ) {

this.balance+= money; //余额增加

return this;

}

//取款

public Account withdraw(double money) {

if(balance - money >= 0) { //判断余额是否足够

balance -= money; //余额减少

// System.out.println("存款成功");

}

else {

System.out.println("您的余额不足！");

}

return this;

}

//重写toString方法

@Override

public String toString() {

return "Account [id=" + id + ", password=" + password + ", name=" + name + ", personId=" + personId + ", email="

+ email + ", balance=" + balance + ", type=" + type + "]";

}

}

SavingAccount.java

package com.task1;

public class SavingAccount extends Account {

public SavingAccount() {

super();

// TODO Auto-generated constructor stub

}

public SavingAccount(long id, String password, String name, String personId, String email, double balance,

int type) {

super(id, password, name, personId, email, balance, type);

// TODO Auto-generated constructor stub

}

@Override

public String toString() {

return "SavingAccount [getId()=" + getId() + ", getPassword()=" + getPassword() + ", getName()=" + getName()

+ ", getPersonId()=" + getPersonId() + ", getEmail()=" + getEmail() + ", getBalance()=" + getBalance()

+ ", getType()=" + getType() + "]";

}

}

CreditAccpunt.java

package com.task1;

public class CreditAccount extends Account{

private double ceiling;

public CreditAccount() {

super();

}

public CreditAccount(long id, String password, String name, String personId, String email, double balance,

int type,double ceiling) {

super(id, password, name, personId, email, balance, type);

this.ceiling = ceiling;

}

public double getCeiling() {

return ceiling;

}

public void setCeiling(double ceiling) {

this.ceiling = ceiling;

}

@Override

public String toString() {

return "CreditAccount [getCeiling()=" + getCeiling() + ", getId()=" + getId() + ", getPassword()="

+ getPassword() + ", getName()=" + getName() + ", getPersonId()=" + getPersonId() + ", getEmail()="

+ getEmail() + ", getBalance()=" + getBalance() + ", getType()=" + getType() + "]";

}

@Override

public Account withdraw(double money) {

if(getBalance() >= money) {

setBalance(getBalance() - money);

}else if(getBalance() + getCeiling() >= money) {

setCeiling(getCeiling()-(money-getBalance()));

setBalance(0);

}else {

System.out.println("对不起，您的余额不足");

}

return this;

}

}

Bank.java

package com.task1;

import java.util.Scanner;

public class Bank {

int index = 0; //当前用户数量

Account [] accounts = new Account [100];//数据库

Account account = null;

/*

* 用户开户(register)

参数列表: Long 账号, String密码, String确认密码,String 姓名,String身份证号码,String邮箱,int 账户类型；

(Long id, String password, String repassword, String name, String personID, String email, int type)

返回类型：Account

规定账户类型：0 – 储蓄账户 1 – 信用账户 2 – 可贷款储蓄账户 3– 可贷款信用账户

*/

//用户开户

public Account register(Long id, String password, String repassword, String name, String personId, String email, int type) {

if(password.equals(repassword)) { // 判断两次输入密码是否一致

switch (type) { //根据用户类型创建不同账户

case 0:

account = new SavingAccount(id, repassword, name, personId, email, 0, type); //创建储蓄账户

break;

case 1:

account = new CreditAccount(id, repassword, name, personId, email, 0, type,1000); //创建信用账户

}

accounts[index++] = account; //账户信息存到数据库，用户数量+1

}

// else {

// System.out.println("两次输入的密码不一致");

// }

return account;

}

//用户登录

public Account login(Long id, String password) {

int find = searchIdPassword(index, id, password); //当前用户数组下标

if(find >= 0) { //判断账户密码是否正确

// System.out.println("登录成功");

return accounts[find]; //返回当前对象

}

// else {

// System.out.println("用户名密码错误");

// }

return null;//如果账户密码错误返回空

}

//用户存款

public Account deposit(Long id, double money) {

int find = searchId(index, id);当前用户数组下标

if(find >= 0) { //判断账户是否存在

accounts[find].deposit(money); //调用Account类的存款方法

// System.out.println("存款成功");

return accounts[find]; //返回当前对象

// accounts[find].setBalance(accounts[find].getBalance()+money);

}

//AvkkF else {

// System.out.println("用户不存在");

// }

return null;//如果账户不存在返回空

}

//用户取款

public Account withdraw(Long id, String password, double money) {

int find = searchIdPassword(index, id, password);//当前用户数组下标

if(find >= 0) { //判断账户密码是否正确

accounts[find].withdraw(money); //调用当前对象的取款方法

// System.out.println("取款成功");

return accounts[find]; //返回当前对象

}

return null;

}

//设置透支额度

public Account updateCeiling(Long id, String password, double money) {

int find = searchIdPassword(index, id, password);//获取当前用户数组下标

if((find >= 0) && (accounts[find].getType()) == 1){ //判断账户号码和密码是否正确，账户类型是否为信用账户

((CreditAccount)accounts[find]).setCeiling(((CreditAccount)accounts[find]).getCeiling() + money); //调用set方法设置透支额度

return accounts[find];

}

return null;

}

// 转账功能

// 参数：from转出账户，passwordFrom 转出账号的密码，to转入账户，money转账的金额

public boolean transfer(Long from, String passwordFrom, Long to, double money) {

int find = searchIdPassword(index, from, passwordFrom); //转账账户数组下标

int find2 = searchId(index, to); //收款账户数组下标

if(find >= 0 && find2 >= 0 && accounts[find].getBalance() >= money) { //判断转账账户密码、收款账户是否匹配，判断转账用户余额是否足够

accounts[find].withdraw(money);//转账用户转账操作==取款

accounts[find2].deposit(money);//收款用户 == 存款

return true;

}

return false;

}

//统计银行所有账户余额总数

public double balanceSum() {

double sum = 0; //初始化所有账户余额

for(int i = 0; i < index; i++) { //遍历数组

sum += accounts[i].getBalance();//求和(账户余额)

}

return sum;

}

//统计所有信用账户透支额度总数

public double ceilingSum() {

double sum = 0; //初始化所有透支额度和

for(int i = 0; i < index; i++) { //遍历

if(accounts[i].getType() == 1) { //判断账户类型是否为信用账户

sum += ((CreditAccount)accounts[i]).getCeiling(); //求和

}

}

return sum;

}

//搜索Id与密码返回数组下标位置

public int searchIdPassword(int index, Long id, String password) {

for(int i = 0; i < index; i++) {

if(id.equals(accounts[i].getId()) && password.equals(accounts[i].getPassword())){ //比较账户和密码是否匹配

return i ; //匹配则返回账户数组下标

}

}

return -1; //不匹配则返回-1

}

//搜索Id

public int searchId(int index, Long id) {

for(int i = 0; i &lhttp://t; index; i++) {

if(id.equals(accounts[i].getId())){ //比较账户是否匹配

return i ; //匹配则返回账户数组下标

}

}

return -1; //不匹配则返回-1

}

}

TestAccount.java

package com.task1;

public class TestAccount {

public static void main(String[] args) {

Account a =new Account(123456L, "123456","张三", "421356", "tt@tt.com", 100.0, 0);

System.out.println(a);

}

}

TestBank.java

package com.task1;

import java.util.Scanner;

public class TestBank {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

Bank bank = new Bank();

String action =null;

do {

System.out.println("菜单：");

System.out.println("---[1.开户]---");

System.out.println("---[2.登录]---");

System.out.println("---[3.存款]---");

System.out.println("---[4.取款]---");

System.out.println("---[5.设置透支额度]---");

System.out.println("---[6.转账]---");

System.out.println("请选择服务");

int choice =sc.nextInt();

switch(choice) {

case 1: //开户

System.out.println("请输入账户号码：");

Long id = sc.nextLong();

System.out.println("请输入账户密码：");

String password = sc.next();

System.out.println("请确认账户密码：");

String repassword = sc.next();

System.out.println("请输入真实姓名：");

String name = sc.next();

System.out.println("请输入身份证号：");

String personId = sc.next();

System.out.println("请输入电子邮箱：");

String email = sc.next();

System.out.println("请输入账户类型：0 – 储蓄账户 1 – 信用账户 2 – 可贷款储蓄账户 3– 可贷款信用账户");

int type = sc.nextInt();

Account a1 = bank.register(id, password, repassword, name, personId, email, type);

if(a1 != null) {

System.out.println(a1);

System.out.println("开户成功");

}else {

http:// System.out.println("两次输入密码不一致");

}

break;

case 2: //登录

System.out.println("请输入账户号码：");

id = sc.nextLong();

System.out.println("请输入账户密码：");

password = sc.next();

Account a2 = bank.login(id, password);

if(a2 != null) {

System.out.println(a2);

System.out.println("登录成功");

}else {

System.out.println("账户号码密码错误");

}

break;

case 3: //存款

System.out.println("请输入账户号码：");

id = sc.nextLong();

System.out.println("请输入存款金额：");

double money = sc.nextDouble();

Account a3 = bank.deposit(id, money);

if(a3 != null) {

System.out.println(a3);

System.out.println("存款成功");

}else {

System.out.println("账户不存在");

}

break;

case 4: //取款

System.out.println("请输入账户号码：");

id = sc.nextLong();

System.out.println("请输入账户密码：");

password = sc.next();

System.out.println("请输入取款金额：");

money = sc.nextDouble();

Account a4 = bank.withdraw(id, password, money);

if(a4 != null ) {

System.out.println(a4);

System.out.println("取款成功");

}else {

System.out.println("账户号码密码错误");

}

break;

case 5://设置透支额度

System.out.println("请输入账户号码：");

id = sc.nextLong();

System.out.println("请输入账户密码：");

password = sc.next();

System.out.println("请输入透支金额：");

money = sc.nextDouble();

Account a5 = bank.updateCeiling(id, password, money);

if(a5 != null ) {

System.out.println(a5);

System.out.println("设置透支额度成功");

}else {

System.out.println("账户号码密码错误或账户类型错误");

}

break;

case 6:// 转账功能

System.out.println("请输入转账账户号码：");

Long from = sc.nextLong();

System.out.println("请输入转账账户密码：");

String passwordFrom = sc.next();

System.out.println("请输入收款账户号码：");

Long to = sc.nextLong();

System.out.println("请输入转账金额：");

money = sc.nextDouble();

boolean http://flag = bank.transfer(from, passwordFrom, to, money);

if(flag) {

System.out.println("转账成功");

}else {

System.out.println("转账失败");

}

break;

default:

System.out.println("服务选择错误");

}

System.out.println("是否继续(y/n)?");

action = sc.next();

}while("y".equals(action));

double balanceSum = bank.balanceSum();

double ceilingSum = bank.ceilingSum();

System.out.println("银行所有账户余额总数:"+balanceSum);

System.out.println("所有信用账户透支额度总数"+ceilingSum);

}

}

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