BufferedWriter不写

Question

我有一个javafx应用程序，我希望从非常复杂的形式添加新记录。表单正常工作，并将数据发送到编写器类以实际将其写入文本文件，但是，新行不会添加到文件中。我怀疑这种行为的原因是该文件已经打开以供阅读以在TableView中显示内容但是我应该抛出一些我没有的异常。 调用writer的控制器方法如下所示：

@FXML
private void handleSubmit() {
    String utc = "";
    String filePath = mainApp.getAdifFilePath().getPath();
    Adif2Writer writer = new Adif2Writer();

    // get all records for the left side
    try {
        for (RecordGridController gridController : controllers) {
            Map<String, String> recordData = gridController.getRecordData();
            if (recordData.get("call") != null) {
                Adif2Record record = new Adif2Record();
                utc = recordData.getOrDefault("utc", utc);
                String utcFormatted = LocalTime.parse(utc).format(DateTimeFormatter.ofPattern("HHmm"));
                record.setCall(recordData.get("callC"));
                writer.write(record, filePath);
            }
        }

        // get all records for right side
        for (RecordGridController gridController : controllers) {
            Map<String, String> recordData = gridController.getRecordData();
            if ((recordData.get("rstC") != null) && (recordData.get("rstC").length() > 1)) {
                Adif2Record record = new Adif2Record();
                utc = recordData.getOrDefault("utc", utc);
                String utcFormatted = LocalTime.parse(utc).format(DateTimeFormatter.ofPattern("HHmm"));
                record.setCall(recordData.get("callC"));
                writer.write(record, filePath);
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
}

编写方法如下：

public void write(Adif2Record record, String filePath) throws IOException {
    Adif2Wrapper wrapper = new Adif2Wrapper(record);

    BufferedWriter bw = new BufferedWriter(new FileWriter(filePath, true));
    bw.write(wrapper.toString());
    System.out.println(wrapper.toString());
}

但是当我按下提交按钮时，没有显示异常或警告，但是文件没有更新，但wrapper.toString（）会返回正确的文本。