package demo1;

public class BankCard {

    private String account;  //账号
    private String password; //密码
    private double balance;  //余额
    private String bankName; //银行卡名字
    private String name;     //持卡人姓名


    public BankCard() {
        super();
    }

    public String getAccount() {
        return account;
    }

    public void setAccount(String account) {
        this.account = account;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public double getBalance() {
        return balance;
    }

    public void setBalance(double balance) {
        this.balance = balance;
    }

    public String getBankName() {
        return bankName;
    }

    public void setBankName(String bankName) {
        this.bankName = bankName;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }


    @Override
    public String toString() {
        return "BankCard{" +
                "account='" + account + '\'' +
                ", password='" + password + '\'' +
                ", balance=" + balance +
                ", bankName='" + bankName + '\'' +
                ", name='" + name + '\'' +
                '}';
    }
}

package demo1;

import java.io.*;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class ATM {
    private BankCard bankCard; //卡槽
    private BankCard bankCard2; // 收款账号
    Scanner scanner = new Scanner(System.in);


    public void longin() {
        System.out.println("*********");
        System.out.println("**欢迎使用ATM**");
        System.out.println("*********");
        System.out.println("输入卡号");
        String account = new Scanner(System.in).next();
        System.out.println("输入密码");
        String password = new Scanner(System.in).next();

        try {
            BufferedReader br = new BufferedReader(new FileReader("data.txt"));
            String s = null;
            while ((s = br.readLine()) != null) {
                String[] arr = s.split(",");
                if (account.equals(arr[0]) && password.equals(arr[1])) {
                    System.out.println("登陆成功");
                    BankCard bankCard = new BankCard();
                    bankCard.setAccount(arr[0]);
                    bankCard.setPassword(arr[1]);
                    bankCard.setBalance(Double.parseDouble(arr[2]));
                    bankCard.setBankName(arr[3]);
                    bankCard.setName(arr[4]);
                    this.bankCard = bankCard;
                    main();
                    break;
                }
            }
            br.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        if (this.bankCard == null) {
            System.out.println("警告：登陆失败");
            longin();
        }
    }

    /*
     *    菜单
     * */
    public void main() {
        while (true) {
            System.out.println("*************************");
            System.out.println("------请输入你想要操作的类型------");
            System.out.println("-------1.余额查询   2.取款    ------");
            System.out.println("-------3.存款      4.转账    ------");
            System.out.println("-------5.打印      6.退卡    ------");
            System.out.println("------- 7.查询转账信息   ------");
            System.out.println("**************************");
            //选择执行功能
            int key = new Scanner(System.in).nextInt();
            switch (key) {
                case 1:
                    this.balanceSearch();
                    break; //余额查询
                case 2:
                    this.withdrawMoney();
                    break; //取款
                case 3:
                    this.deposit();
                    break; //存款
                case 4:
                    this.transferAccounts();
                    break; //转账
                case 5:
                    this.print();
                    break; //打印
                case 6:
                    //把数据更新到data.txt文件中
                    dataUpdate();
                    System.exit(0); //退卡
                case 7:
                    this.searchTransferAccounts();
                    break; //查询转账信息
            }
        }
    }

    private void deposit() {
    }

    private void withdrawMoney() {
        System.out.println("*****请选择你要操作菜单的序号*****");
        System.out.println("*****1.100                        2.200****");
        System.out.println("*****3.500                        4.800****");
        System.out.println("*****5.1000                      6.2000***");
        System.out.println("*****7.其它                       8.返回****");
        int key = scanner.nextInt();
        double money=0;
        if (key==1){
            money=100;
        }else if (key==2){
            money=200;
        }else if (key==2){
            money=200;
        }else if (key==3){
            money=500;
        }else if (key==4){
            money=800;
        }else if (key==5){
            money=1000;
        }else if (key==6){
            money=2000;
        }else if (key==7){
            money=scanner.nextInt();
        }else if (key==8){
            return;
        }
        this.bankCard.setBalance(this.bankCard.getBalance()-money);

        DecimalFormat df = new DecimalFormat("0.0");
        String balance = df.format(this.bankCard.getBalance());
        System.out.println("当前余额为"+balance);
    }

    /*
     *   更新数据
     * */
    private void dataUpdate() {
        List<String> list = new ArrayList<>();
        try {
            BufferedReader br = new BufferedReader(new FileReader("data.txt"));
            String s = null;
            while ((s = br.readLine()) != null) {
                String[] arr = s.split(",");
                if (this.bankCard.getAccount().equals(arr[0])) {
                    list.add(this.bankCard.getAccount() + "," +
                            this.bankCard.getPassword() + "," +
                            this.bankCard.getBalance() + "," +
                            this.bankCard.getBankName() + "," +
                            this.bankCard.getName());
                } else if (this.bankCard2 != null && this.bankCard2.getAccount().equals(arr[0])) {
                    list.add(this.bankCard2.getAccount() + "," +
                            this.bankCard2.getPassword() + "," +
                            this.bankCard2.getBalance() + "," +
                            this.bankCard2.getName());
                } else {
                    list.add(s);
                }
            }
            br.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        try {
            BufferedWriter bw = new BufferedWriter(new FileWriter("data.txt"));
            for (String s : list) {
                bw.write(s);
                bw.newLine();
            }
            bw.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    private void balanceSearch() {
        DecimalFormat df = new DecimalFormat("0.0");
        String balance = df.format(this.bankCard.getBalance());
        System.out.println("当前余额为"+balance);

    }

    private void searchTransferAccounts() {
    }


    private void print() {

    }

    private void transferAccounts() {
        /*转账*/

        System.out.println("请输入收款账号");
        String account = scanner.next(); //收款账号
        System.out.println("请输入转账金额");
        double money = scanner.nextDouble(); //转多少钱
        //this.bankCard.setBalance(this.bankCard.getBalance()-money);
        try {
            BufferedReader br = new BufferedReader(new FileReader("data.txt"));
            String s = null;
            while ((s = br.readLine()) != null) {
                String[] arr = s.split(",");
                if (account.equals(arr[0])) {
                    System.out.println("-->收款账号存在！！");
                    BankCard bankCard = new BankCard();
                    bankCard.setAccount(arr[0]);
                    bankCard.setPassword(arr[1]);
                    bankCard.setBalance(Double.parseDouble(arr[2]));
                    bankCard.setBankName(arr[3]);
                    bankCard.setName(arr[4]);
                    this.bankCard2 = bankCard;//收款银行卡
                    break;
                }
            }
            br.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        if (this.bankCard2 == null) {
            System.out.println("收款卡号不存在！！ 转账失败");
            return;
        }
        this.bankCard2.setBalance(this.bankCard2.getBalance()+money);
        this.bankCard.setBalance(this.bankCard.getBalance()-money);

        DecimalFormat df = new DecimalFormat("0.0");
        String balance = df.format(this.bankCard.getBalance());
        System.out.println("当前余额为"+balance);
        dataUpdate();
        this.bankCard2=null;
    }

    public BankCard getBankCard2() {
        return bankCard2;
    }

    public void setBankCard2(BankCard bankCard2) {
        this.bankCard2 = bankCard2;
    }

    public BankCard getBankCard() {
        return bankCard;
    }

    public void setBankCard(BankCard bankCard) {
        this.bankCard = bankCard;
    }
}

package demo1;

public class Demo {
    public static void main(String[] args) {
        ATM atm = new ATM();
        atm.longin();
    }
}