Question

我正在尝试编写一个简单的登录应用程序，记录登录.txt文件的所有尝试。目前我的应用程序只会记录上次尝试的内容。有什么指针吗？

以下是我的一些代码：

public boolean authenticate(String user, String pword) {
    boolean isValid = false;
    if (user.equalsIgnoreCase("Test")
            && pword.equals("password")) {
        isValid = true;
    }
    return isValid;
}

public static void accessLog(String username) {
    String timestamp = new SimpleDateFormat("yyyy/MM/dd   HH:mm:ss").format(new Date());

    // declaring variables of log and initializing the buffered writer
    String log = "Username: " + username + "   Attempted login timestamp: " + timestamp + "\n";
    BufferedWriter writer = null;

    //write the log variable using the bufferedWriter to log.txt
    try {
        writer = new BufferedWriter(new FileWriter("Log.txt"));
        writer.write(log);
    } //print error message if there is one
    catch (IOException io) {
        System.out.println("File IO Exception" + io.getMessage());
    } //close the file
    finally {
        try {
            if (writer != null) {
                writer.close();
            }
        } //print error message if there is one
        catch (IOException io) {
            System.out.println("Issue closing the file." + io.getMessage());
        }
    }
}

Answer 1

添加一个参数有什么问题？

`boolean isSuccess = authenticate(user, password);
 accessLog(username, isSuccess);

public static void accessLog(String username, boolean isSuccess) {
//code here
}
`

Answer 2

我能用这个来解决我的问题：

        writer = new BufferedWriter(new FileWriter("Log.txt",true));

将所有尝试记录在Java中的.txt文件中

2 个答案: