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);
}
// 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 < 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 {
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 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);
}
}以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持Devmax。