学校银行应用程序的PAT(带分隔的文本文件的阅读方法)

Question

以下是我的程序的方法：

package ItPatPackage;
//Defines a banking Client
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import javax.swing.JOptionPane;
public class Client
{
//attributes
private String clientName;
    private String clientPass;
private int accountNum;
private double currentBal;
private double savingsBal;
    private boolean verify;
//default constructor
public Client()
{
    clientName = "";
            clientPass = "";
    accountNum = 0;
    currentBal = 0.0;
    savingsBal = 0.0;
            verify = false;
}
//parameterised constructor
private Client(String username,String password,int accNum, double
curBal,double savBal, boolean ver)
{
    clientName = username;
            clientPass = password;
    accountNum = accNum;
    currentBal = curBal;
    savingsBal = savBal;
            verify = ver;
}
//get methods
public String getClientName()
{
    return clientName;
}
    public String getClientPass()
    {
            return clientPass;
    }
public int getAccNum()
{
    return accountNum;
}   
 public double getCurrentBal()
{
    return currentBal;
}
public double getSavingsBal()
{
    return savingsBal;
}   
    public boolean getClientVerify()
{
    return verify;
}
//mutator methods
public void setClientName(String username)
{
    clientName= username;
}
public void setClientPass(String password)
{
    clientPass = password;
}   
//deposit
public void depositSavings(double ds)
{
    savingsBal = savingsBal + ds;
}
public void depositCurrent(double dc)
{
    currentBal = currentBal + dc;
}
//withdraw
public void withdrawSavings(double ws)
    {
            if (ws<savingsBal){
            savingsBal = savingsBal - ws;
            }
            else{
                JOptionPane.showMessageDialog(null, "Insufficient Funds. 
nYour Savings Balance is: R" + savingsBal);
            }
    }
    public void withdrawCurrent(double wc)
    {
            if (wc<currentBal){
            currentBal = currentBal - wc;
            }
            else{
                JOptionPane.showMessageDialog(null, "Insufficient Funds.
nYour Current Balance is: R" + currentBal);
            }
    }
//transfer  
    public void transferStoC(double sc)
    {
            if (sc<savingsBal){
            savingsBal = savingsBal - sc;
            currentBal = savingsBal + sc;
            }
            else{
                JOptionPane.showMessageDialog(null, "Insufficient Funds.
 nYour Savings Balance is: R" + savingsBal);
            }
    }
    public void transferCtoS(double cs)
    {
            if (cs<savingsBal){
            savingsBal = savingsBal + cs;
            currentBal = savingsBal - cs;
            }
            else{
                JOptionPane.showMessageDialog(null, "Insufficient Funds. 
nYour Current Balance is: R" + currentBal);
            }
    }
    //: Creates New Client
    public void newClient(String username,String password) throws 
IOException
    {
        clientName = username;
        clientPass = password;
        accountNum = (int)(Math.random()*100000);
        savingsBal = (int)((Math.random()*100000000)) / 100.0;
        currentBal = (int)((Math.random()*100000000)) / 100.0;
        BufferedWriter bw = new BufferedWriter (new     
FileWriter("ClientDatabase.txt",true));
 bw.write(clientName+"_"+clientPass+"_"+accountNum+"_"+currentBal+"_"+savingsBal+"_");
            bw.newLine();
            bw.close();
                }
    //: Verifies new Client (THIS IS WHAT DOESN'T WORK, ALONG WITH THE CODE I WILL POST AFTER THIS
    public boolean clientVerify(String checkUsername, String checkPassword)
    {
        try 
        {
            BufferedReader br = new BufferedReader(new FileReader("ClientDatabase.txt"));
            String s;
            while ((s = br.readLine()) != null){
                String line = br.readLine();
                String part[] = line.split("_");
                if ((part[0].equals(checkUsername))|(part[1].equals(checkPassword))){
                    accountNum = Integer.parseInt(part[3]);
                    currentBal = Double.parseDouble(part[4]);
                    savingsBal = Double.parseDouble(part[5]);
                    verify = true;
                }
            }
        }
        catch(IOException | NumberFormatException e)
        {
            JOptionPane.showMessageDialog(null, "Error");
        }
        return verify;
    }
}

我的登录按钮的代码如下：

private void btnLoginActionPerformed(java.awt.event.ActionEvent evt) {                                         
String checkUsername = txfUsername.getText();
String checkPassword = txfPassword.getText();
Client cl1 = new Client();
boolean verify = cl1.clientVerify(checkUsername, checkPassword);
if (verify==true){
    OptionsPage options = new OptionsPage();
    options.setVisible(true);
    this.setVisible(false);
}
else{
    JOptionPane.showMessageDialog(null, "Username/Password do not match or     do not exist.");
}    
}

如上所述，我的"clientVerify"方法一直存在问题，该方法适用于我的"登录按钮"，我不确定哪一部分是错误的。。它似乎不起作用，而且我认为我的BufferedReader没有正确读取文本文件。（这是我唯一能想到的可能是错误的事情，如果是其他事情，请纠正我。）无论用户输入如何，都会出现一个JOptionPane消息对话框，显示"错误"，然后显示"用户名/密码不匹配或不存在"。我已经检查了文本文件，所有信息都用"_"完美地隔开。另一种可能性是，我的方法与我在默认构造函数中输入的方法没有变化。我承认我是新手，所以这可能是可能的。

任何帮助都将不胜感激。

Answer 1

String line;
    Path file = Paths.get("C:\Users\nik\Documents\Programming\TextFiles\Events.txt");
    try {
        InputStream input = new BufferedInputStream(Files.newInputStream(file));
     BufferedReader reader = new BufferedReader(new InputStreamReader(input));

尝试使用此代码来获取文本文件的路径。因为您的方法看起来是有序的，但可能您的程序在查找文本文件时遇到了问题。希望这能奏效。