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银行账户代码java java银行开户代码
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JAVA 简单银行系统的代码
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class AccountDemo {
public static double MONEY = 0;// 初始化金额是100元。
public static void main(String[] args) {
final String USER_NAME = "zhangsan";// 用户名
final String PASSWORD = "123456";// 密码
while (true) {
System.out.print("请输入用户名：");
String user_name = getString();
System.out.print("请输入密码：");
String password = getString();
if (user_name != null user_name.equals(USER_NAME)
password != null password.equals(PASSWORD)) {
System.out.println("登陆成功！你要干什么？");
while (true) {
System.out.println("1：存款");
System.out.println("2：取款");
System.out.println("3：查询余额");
System.out.println("q：退出程序");
System.out.print("请选择：");
String userIn = getString();
int in = 0;
if (userIn != null userIn.equals("1")) {
in = Integer.parseInt(userIn);
} else if (userIn != null userIn.equals("2")) {
in = Integer.parseInt(userIn);
} else if (userIn != null userIn.equals("3")) {
in = Integer.parseInt(userIn);
} else if (userIn != null
userIn.trim().toUpperCase().equals("Q")) {
in = 4;
} else {
System.out.println("你输入的指令不正确！请重新输入。");
continue;
}
switch (in) {
case 1:
double add_money = 0;
while (true) {
System.out.print("请输入你要存入的金额：");
try {
add_money = Double.parseDouble(getString());
} catch (Exception e) {
System.out.println("金额输入不正确！");
continue;
}
break;
}
MONEY += add_money;
System.out.println("存入的金额是" + add_money
+ "\r\n请选择你要的操作：");
break;
case 2:
double money = 0;
while (true) {
System.out.print("请输入你要取出的金额：");
try {
money = Double.parseDouble(getString());
} catch (Exception e) {
System.out.println("金额输入不正确！");
continue;
}
if (money MONEY) {
System.out.println("取出的金额大于现有存款，请重新输入要取出的金额！");
continue;
}
break;
}
MONEY -= money;
System.out.println("取出的金额是" + money + "\r\n请选择你要的操作：");
break;
case 3:
System.out.println("你的余额是：" + MONEY + "\r\n请选择你要的操作：");
break;
case 4:
System.out.println("程序退出！");
return;
}
}
} else {
System.out.println("错误：用户名与密码不匹配！\r\n");
System.out.println("按任意键:重新输入用户名和密码。");
System.out.println("q:退出程序。");
System.out.print("请选择:");
String in = getString();
if (in.trim().toUpperCase().equals("Q")) {
break;
}
}
}
}
public static String getString() {
String str = null;
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
try {
str = br.readLine();
} catch (IOException e) {
e.printStackTrace();
}
return str;
}
}
相关问答
Q1: 用Java编写银行账户存取款业务，急求！！
public class Account {
protected String accId;
protected String name;
protected double money;
public Account (String accId,String name){
this(accId,name,0);
}
public Account (String accId,String name,double money){
this.accId = accId;
this.name = name;
this.money = money;
}
public void saveMoney(double money){
if(money = 0){
System.out.println("存款金额必须大于0");
}
this.money += money;
System.out.println("存款成功");
}
public double getMoney(double money){
if(money = 0){
System.out.println("取款金额必须大于0");
return 0;
}
if(this.money = money){
System.out.println("余额不足，无法取款");
return 0;
}
this.money -= money;
System.out.println("取款成功");
return money;
}
public double getBalance(){
return this.money;
}
protected double getOverdraft(){
return 0;
}
// 实现了equals方法，list比较时才能正确
@Override
public boolean equals(Object obj) {
if(obj == null){
return false;
}
if(this == obj){
return true;
}
if(obj instanceof Account){
return this.accId.equals(((Account)obj).accId);
}
return false;
}
@Override
public String toString() {
return "账户=" + accId + ",名字=" + name + ",余额=" + money;
}
}
public class Bank {
// Account实现了equals方法，list查找时才能正确
private ListAccount usersAccounts;
public Bank() {
usersAccounts = new ArrayListAccount();
}
public void addAccount(Account account) {
if (usersAccounts.contains(account)) {
System.out.println("添加失败，不能添加同样的账户");
return;
}
usersAccounts.add(account);
}
public boolean delAccount(Account account) {
return usersAccounts.remove(account);
}
public boolean delAccount(String accId) {
return delAccount(new Account(accId, null));
}
public boolean existAccount(Account account) {
return usersAccounts.contains(account);
}
public boolean existAccount(String accId) {
return existAccount(new Account(accId, null));
}
public Account getAccount(String accId){
return usersAccounts.get(usersAccounts.indexOf(new Account(accId, null)));
}
public double getAllMoney() {
// 不考虑是否溢出，只是把所有用户余额相加
double result = 0;
for (Account account : usersAccounts) {
result += account.getBalance();
}
return result;
}
public double getAllOverdraft() {
// 不考虑是否溢出
double result = 0;
for (Account account : usersAccounts) {
result += account.getOverdraft();
}
return result;
}
public int getAccountNum() {
return usersAccounts.size();
}
public int getCreditAccountNum() {
int num = 0;
for (Account account : usersAccounts) {
// instanceof 性能没有简单的方法快。
if (account instanceof CreditAccount) {
num++;
}
}
return num;
}
public int getSavingAccountNum() {
int num = 0;
for (Account account : usersAccounts) {
if (account instanceof SavingAccount) {
num++;
}
}
return num;
}
public ListAccount getAllAccount() {
return usersAccounts;
}
}
public class CreditAccount extends Account{
private double overdraft;
public CreditAccount(String accId,String name){
super(accId, name);
this.overdraft = 1000;
}
public CreditAccount(String accId,String name,double money){
this(accId, name,money,1000);
}
public CreditAccount(String accId,String name,double money,double overdraft){
super(accId, name,money);
this.overdraft = overdraft;
}
@Override
public double getMoney(double money) {
if(money = 0){
System.out.println("取款金额必须大于0");
return 0;
}
if(this.money + overdraft = money){
System.out.println("余额不足，无法取款");
return 0;
}
this.money -= money;
System.out.println("取款成功");
return money;
}
@Override
public double getOverdraft(){
return overdraft;
}
@Override
public String toString() {
return "账户=" + accId + ",名字=" + name + ",余额=" + money + ",透支=" + overdraft;
}
}
public class SavingAccount extends Account {
public SavingAccount(String accId, String name) {
super(accId, name);
}
public SavingAccount(String accId, String name, double money) {
super(accId, name, money);
}
@Override
public double getMoney(double money) {
return super.getMoney(money);
}
@Override
public double getOverdraft() {
return super.getOverdraft();
}
}
public class Test {
private static Bank bank = new Bank();
public static void main(String[] args) {
Test.genAccount();
// 开户
Account a1 = new CreditAccount("1", "1", 200, 2000);
Account a2 = new SavingAccount("2", "2", 300);
Account a3 = new SavingAccount("3", "3", 400);
Account a4 = new CreditAccount("4", "4", 500, 2000);
Account a5 = new CreditAccount("4", "5", 600, 2000); // 帐号4重
bank.addAccount(a1);
bank.addAccount(a2);
bank.addAccount(a3);
bank.addAccount(a4);
bank.addAccount(a5);
showNowAccount();
// 销户
bank.delAccount("1");
bank.delAccount("2");
showNowAccount();
// 存款
if(bank.existAccount("3")){
Account acc = bank.getAccount("3");
acc.saveMoney(100);
}
showNowAccount();
// 取款
if(bank.existAccount("3")){
Account acc = bank.getAccount("3");
System.out.println("余额=" + acc.getBalance());
acc.getMoney(100);
System.out.println("余额=" + acc.getBalance());
acc.getMoney(1000);
System.out.println("余额=" + acc.getBalance());
}
if(bank.existAccount("4")){
Account acc = bank.getAccount("4");
System.out.println("余额=" + acc.getBalance());
acc.getMoney(100);
System.out.println("余额=" + acc.getBalance());
acc.getMoney(1000);
System.out.println("余额=" + acc.getBalance());
acc.getMoney(10000);
System.out.println("余额=" + acc.getBalance());
}
System.out.println(bank.getAccountNum());
System.out.println(bank.getAllMoney());
System.out.println(bank.getAllOverdraft());
System.out.println(bank.getCreditAccountNum());
System.out.println(bank.getSavingAccountNum());
}
public static void genAccount(){
String s = "1000 0000 0000 000";
Account a = null;
for(int i = 1; i 11; i ++){
if((i 2) == 0){
a = new CreditAccount(s + String.valueOf(i), "账户" + String.valueOf(i));
} else {
a = new SavingAccount(s + String.valueOf(i), "账户" + String.valueOf(i));
}
bank.addAccount(a);
}
}
public static void showNowAccount(){
for(Account account : bank.getAllAccount()){
System.out.println(account);
}
}
}
// 面向对象，看多写多了就会了，简单的随便写的，有错误先不用太纠结。
Q2: java编写一个帐户类实现银行帐户的概念,创建帐户类的对象,完成存款与取款等操作.
其实银行账户代码java你照着这些话一句句就已经写出来银行账户代码java了。。。
public class BankAccount {
String account_number;
int leftmoney;
public BankAccount() {
// TODO Auto-generated constructor stub
}
public BankAccount(String account_number, int leftmoney) {
super();
this.account_number = account_number;
this.leftmoney = leftmoney;
}
public void savemoney(int money) {
leftmoney += money;
}
public void getmoney(int money) {
if (leftmoney money) {
leftmoney -= money;
} else {
System.out.println("账户余额不足");
}
}
public int getleftmoney() {
return leftmoney;
}
public static void main(String[] args) {
BankAccount ba = new BankAccount("123456", 500);
ba.savemoney(1000);
ba.getmoney(2000);
}
}
Q3: 用java编的银行账户系统代码
package pack.money.persistent;import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;import pack.money.entity.Client;
import pack.money.entity.ClientMessage;
public class ClientPersistent {
//private static int a=0;
private static String t,b;//t是password b是clinetname
private static ClientPersistent sp;
public static ClientPersistent getClientPersistent() {
if (sp == null) {
sp = new ClientPersistent();
}
return sp;
}
private ClientMessage getClientMessage(ResultSet rs) throws Exception{
ClientMessage student=new ClientMessage();
student.setMoney(rs.getFloat("money"));
student.setType(rs.getString("type"));
student.setClientName(rs.getString("ClientName"));
student.setTransactionID(rs.getInt("TransactionID"));
return student;
}
public Client login(Connection con,String ClientName,String password) throws Exception{
String sql="select balance,password,ClientName from Client where ClientName=? and password=?";
PreparedStatement ps=con.prepareStatement(sql);
ps.setString(1, ClientName);
ps.setString(2, password);
ResultSet rs=ps.executeQuery();
t=password;
b=ClientName;
System.out.println(t);
System.out.println(b);
if(rs.next()){
Client client=new Client();
client.setClientName(rs.getString("ClientName"));
client.setPassword(rs.getString("password"));
return client; }
throw new Exception("Can not login, the accountID or password has error. ");
} public void save(Connection con ,String money)throws Exception
{ // a++;
String s="save";
float g=Float.parseFloat(money);
String sql="update Client set balance=balance+? where ClientName=?";
String sql1="insert into ATMTransaction(ClientName,Type,money) values(?,?,?) ";
PreparedStatement ps=con.prepareStatement(sql);
PreparedStatement ps1=con.prepareStatement(sql1);
ps.setFloat(1, g);
ps.setString(2,b);
//ps1.setInt(1,a);
ps1.setString(1,b);
ps1.setString(2,s);
ps1.setFloat(3,g);
ps.executeUpdate();
ps1.executeUpdate();
}
public void withDraw (Connection con ,String money)throws Exception
{ //a++;
String s="WithDraw";
float x=Float.parseFloat(money);
String sql="update Client set balance=balance-? where ClientName=?";
String sql1="insert into ATMTransaction(ClientName,Type,money) values(?,?,?)";
PreparedStatement ps=con.prepareStatement(sql);
PreparedStatement ps1=con.prepareStatement(sql1);
ps.setFloat(1, x);
ps.setString(2,b);
//ps1.setInt(1,a);
ps1.setString(1,b);
ps1.setString(2,s);
ps1.setFloat(3,x);
ps.executeUpdate();
ps1.executeUpdate();
}
public String changePassword(Connection con, String OldPassWord,String newPassWord1,String newPassWord2)
throws Exception
{
if(t.equals(OldPassWord))
{
if(newPassWord1.equals(newPassWord2))
{
String sql="update Client set password=? where ClientName=?";
PreparedStatement ps=con.prepareStatement(sql);
ps.setString(1, newPassWord1);
ps.setString(2,b);
ps.executeUpdate();
String j="dsfasdf";
return j;
}
else
{System.out.print("确认密码错误银行账户代码java！");br return null;}
}
else
{ return null;
}
}
public ArrayListClientMessage disPlayAll(Connection con ) throws Exception
{
String sql="select * from ATMTransaction where ClientName=? ";
PreparedStatement ps=con.prepareStatement(sql);
ps.setString(1,b);
System.out.println(b+"****b****");
ResultSet rs=ps.executeQuery();
ArrayListClientMessage message=new ArrayListClientMessage();
while(rs.next()){
message.add(this.getClientMessage(rs));
}
return message;
}
public float showBalance(Connection con ) throws Exception
{
String sql="select balance from Client where ClientName=?";
PreparedStatement ps=con.prepareStatement(sql);
ps.setString(1, b);
ResultSet rs=ps.executeQuery();
if(rs.next())
{
float s;
s=rs.getFloat("balance");
return s;
}
else return 0 ;
}
}
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