我得到了解决方案，并将其发布在下面。
public void doGet(HttpServletRequest request, HttpServletResponse response){ response.setContentType("text/csv"); response.setHeader("Content-Disposition", "attachment; filename="userDirectory.csv""); try { OutputStream outputStream = response.getOutputStream(); String outputResult = "xxxx, yyyy, zzzz, aaaa, bbbb, ccccc, dddd, eeee, ffff, ggggn"; outputStream.write(outputResult.getBytes()); outputStream.flush(); outputStream.close(); } catch(Exception e) { System.out.println(e.toString()); }}在这里，我们不需要在服务器中保存/存储文件。
谢谢
