Java ATM机 Java模拟实现ATM机

package bank;

import java.io.*;
import java.util.Scanner;

//ATM类
public class Atm {
 private String[] user;//用户全部信息
 private double money;//修改钱数
 private double userMoney;//用户的钱
 private String newPassword;
 private String userInFo;
 private int index;
 private int a =0;
 private int count = 10;

 public void show(){//显示界面
  index = logIn();
  if(index != -1){
   working();
  }
 }

 private String[] newStringUser(String[] str){
  count=count+10;
  String[] newUser = new String[count];
  for(int i=0;i<a;i++)
   newUser[i] = str[i];
  return newUser;
 }

 private void getUser(){//从文件获取全部用户
  String str;
  String[] strings = new String[count];
  File file = new File("src\\bank\\user");
  FileReader fileReader = null;
  BufferedReader bufferedReader = null;
  try{
   fileReader = new FileReader(file);
   bufferedReader = new BufferedReader(fileReader);
   while((str = bufferedReader.readLine())!=null){
    if(a<=count)
     strings[a++] = str;
    else
     strings = newStringUser(strings);
   }
   user = new String[a];
   for(int i=0;i<a;i++)
    user[i] = strings[i];
   strings = null;
  }catch(Exception e){
   e.printStackTrace();
   if((fileReader!=null)&&(bufferedReader!=null)){
    try {
     bufferedReader.close();
     fileReader.close();
    } catch (IOException e1) {
     e1.printStackTrace();
    }
   }
  }
 }

 private int logIn(){//用户登录
  getUser();
  String name,password,user;
  String[] a;
  int i = 0;
  int number = -1;
  Scanner input = new Scanner(System.in);
  a:while(i<3){
   System.out.println("请输入用户名：");
   name = input.nextLine();
   System.out.println("请输入用户密码：");
   password = input.nextLine();
   user = name + "*" + password;
   for(int j=0;j<this.user.length;j++){
    a = this.user[j].split("\\*");
    userInFo = a[0]+"*"+a[1];
    if(userInFo.equals(user)){
     number = j;
     break a;
    }
   }
   i++;
   System.out.println("账户或密码错误请重新输入。。。");
  }
  if(number!=-1){
   System.out.println("登录成功");
   try{
    Thread.sleep(1000);
   }catch(Exception e){
    e.printStackTrace();
   }
  }
  else
   System.out.println("您已输入错误三次，卡已被吞！请到银行柜台询问！");
  return number;
 }

 private int anthorLogin(){//查询转账用户是否存在
  Scanner input = new Scanner(System.in);
  String antherUserName;
  String[] a;
  int x=-1;
  System.out.println("请输入要转账的用户名：");
  antherUserName = input.nextLine();
  for(int i=0;i<user.length;i++){
   a = this.user[i].split("\\*");
   if(a[0].equals(antherUserName)){
    x=i;
    break;
   }
  }
  return x;
 }

 private void show1(){
  System.out.println("**********************");
  System.out.println("\t欢迎使用ATM");
  System.out.println("1，账户余额查询\n2，存钱\n3，取钱\n4，转账\n5，修改用户密码\n6，退出系统\n");
  System.out.println("**********************");
 }

 private void changeUser(int x){//改变用户数组里的数据
  String[] str = user[index].split("\\*");
  if(x==1)
   user[index] = str[0]+"*"+newPassword+"*"+str[2];
  else
   user[index] = str[0]+"*"+str[1]+"*"+userMoney;
 }

 private void working(){//atm办理的业务
  String number;
  setMoney();
  do{
   show1();
   System.out.println("请输入要办理的业务序号：");
   Scanner input = new Scanner(System.in);
   number = input.nextLine();
   switch(number){
    case "1":
     look();
     break;
    case "2":
     saveMoney();
     break;
    case "3":
     getMoney();
     break;
    case "4":
     giveMoney();
     break;
    case "5":
     changePassword();
     break;
    case "6":
     System.out.println("欢迎下次光临！");
     write();
     break;
    default:
     System.out.println("您输入有误，请重新输入。。。。");
   }
  }while(!number.equals("6"));
 }

 private void setMoney(){
  String u = user[index];
  userMoney = Double.parseDouble(u.split("\\*")[2]);
 }

 private void look(){//办理查看余额业务
  System.out.println("用户余额为："+userMoney);
  try{
   Thread.sleep(2000);
  }catch(Exception e){
   e.printStackTrace();
  }
 }

 private void saveMoney(){//办理存钱业务
  money = howMuch("存钱");
  userMoney = userMoney+money;
  changeUser(2);
  look();
  if(isContinue())
   saveMoney();
 }

 private void getMoney(){//办理取钱业务
  money = howMuch("取钱");
  if(money <= userMoney){
   userMoney = userMoney-money;
   changeUser(2);
   look();
   if(isContinue())
    getMoney();
  }
  else
   System.out.println("您的余额不足！");
 }

 private void giveMoney(){//办理转账业务
  int anthorIndex = anthorLogin();
  if(anthorIndex!=-1){
   money = howMuch("转账");
   if(money <= userMoney){
    userMoney = userMoney - money;
    changeUser(2);
    String anthorUser = user[anthorIndex];
    String[] str =anthorUser.split("\\*");
    double money1 = Double.parseDouble(str[2]);
    money = money + money1;
    user[anthorIndex] = str[0]+"*"+str[1]+"*"+money;
    System.out.println("转账成功！");
    look();
   }
   else
    System.out.println("您的余额不足！");
  }
  else
   System.out.println("该用户不存在。。。。");
 }

 private double howMuch(String str){
  System.out.println("欢迎办理"+str+"业务。。。。。。");
  System.out.println("请输入金额(只能是整数且是100的倍数，最多为10000)：");
  Scanner input = new Scanner(System.in);
  double money = input.nextDouble();
  if(money%10==0)
   return money;
  else{
   System.out.println("您输入有误！");
   return 0.0;
  }
 }

 private void changePassword(){//办理修改密码业务
  System.out.println("请输入新密码：");
  Scanner input = new Scanner(System.in);
  newPassword = input.nextLine();
  changeUser(1);
  System.out.println("密码修改成功！");
 }

 private boolean isContinue(){
  System.out.println("是否继续办理该项业务？(请输入Y(y)/N(n))");
  Scanner input = new Scanner(System.in);
  String str = input.nextLine();
  if(str.equalsIgnoreCase("y"))
   return true;
  else
   return false;
 }

 private void write(){
  String str = "";
  String s;
  for(int i=0;i<user.length;i++){
   s = user[i];
   if(i!=user.length-1)
    str = str + s + "\n";
   else
    str = str + s;
  }
  File file = new File("src\\bank\\user");
  FileWriter out = null;
  try {
   out = new FileWriter(file);
   out.write(str);
   out.flush();
  } catch (IOException e) {
   e.printStackTrace();
  }finally{
   if(out != null){
    try {
     out.close();
    } catch (IOException e) {
     e.printStackTrace();
    }
   }
  }
 }
}

package bank;

//银行类
public class Bank {

 private Atm atm = new Atm();

 public void welcome(User user){
  System.out.println("欢迎使用atm");
  user.useAtm(atm);
 }

}

package bank;

//用户类
public class User {

 public void useAtm(Atm atm){
  atm.show();
 }
}

//创建user文件当数据库
张三*456*100.0
李四*123*300.0
王五*789*200.0

package bank;

//测试类
public class Text {
 public static void main(String[] args){
  Bank bank =new Bank();
  User user = new User();
  bank.welcome(user);
 }
}