我正在嘗試與目錄一起創(chuàng)建一個(gè)新文件，但是當(dāng)我調(diào)用“fos = new FileOutputStream(file);”時(shí) 它總是拋出找不到文件的錯(cuò)誤。這是代碼FileOutputStream fos = null;String getName = "User";String filePath="D:/New file";File file;Date date = new Date();ByteArrayOutputStream outputStream = new ByteArrayOutputStream();String headerDate = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss").format(date);try {  WritableWorkbook w = Workbook.createWorkbook(outputStream);  WritableSheet s = w.createSheet("Report generate", 0);  s.addCell(new Label(0, 0, "New File" + getName));  s.addCell(new Label(0, 2, "Response Date: " + headerDate));  w.write();  w.close();  String resultFileName = "NewFileToGenerate" +getName+headerDate+ ".xls";  String fileName = filePath.concat(resultFileName);  file = new File(fileName);  file.mkdirs();  file.createNewFile();  fos = new FileOutputStream(file);  ByteArrayOutputStream baos = new ByteArrayOutputStream();  baos = outputStream;  // Put data in your baos  baos.writeTo(fos);} catch (Exception e) {} finally {  outputStream.close();  fos.close();}在這里，我有文件路徑，但在該文件路徑中，我必須通過在其中附加日期來(lái)創(chuàng)建另一個(gè)文件夾，然后我必須保存文件。這是堆棧跟蹤D:/New file/NewFileToGenerateUser26/2018 20:00:14.xls（是目錄）