(JavaFX)如何使DirectoryChooser打开一次而不是两次，并使数据真正出现在文本文件中？

Button openButton = new Button("选择文件夹");
openButton.setOnAction(e -> {
    DirectoryChooser directoryChooser = new DirectoryChooser();
    File selectedDirectory = directoryChooser.showDialog(stage); // stage是你的JavaFX舞台对象
    if (selectedDirectory != null) {
        // 执行文件写入操作
        writeDataToFile(selectedDirectory);
    }
});

private void writeDataToFile(File directory) {
    try {
        File file = new File(directory.getAbsolutePath() + "/data.txt");
        FileWriter writer = new FileWriter(file);
        writer.write("这是要写入的数据");
        writer.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}