問(wèn)題描述

使用JSP+springMVC框架做的web平臺(tái)，在做文件下載的時(shí)候，遇到這樣的問(wèn)題：

文件下載部分的代碼是這樣寫的：

@RequestMapping('/ModelDownload{id}')public String ModelDownLoad(@PathVariable int id, HttpServletResponse response){ String fileName = 'download.txt'; String filePath = 'D:'; String modelName = new ModelService().getModelById(id).getModelName(); System.out.println(modelName); response.reset(); response.setContentType('application/x-download'); response.addHeader('Content-Disposition', 'attachment;filename='+fileName);//重新設(shè)置響應(yīng)頭文件字段，設(shè)置下載文件的文件名 OutputStream OutputStream = null; FileInputStream fileInputStream = null; try {OutputStream = response.getOutputStream();fileInputStream = new FileInputStream(filePath+fileName);byte[] buffer = new byte[1024*10];//設(shè)置文件大小上限為10Mfor (int read; (read = fileInputStream.read(buffer)) != -1;){ OutputStream.write(buffer,0,read);} } catch (IOException e) {// TODO Auto-generated catch blockSystem.out.println(e.toString()); } finally{try { fileInputStream.close(); OutputStream.close();} catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace();} } return 'success';}

百度了很多，幾乎都是說(shuō)在JSP上使用out對(duì)象進(jìn)行clear()和close()操作的，根本沒(méi)有針對(duì)后臺(tái)操作遇到的相同問(wèn)題的解決方案，求大神指導(dǎo)。

問(wèn)題解答

問(wèn)題解決：把方法的返回類型改為void即可，猜測(cè)問(wèn)題的原因可能是當(dāng)返回類型為String的時(shí)候，點(diǎn)擊下載按鈕，彈出下載頁(yè)面，這時(shí)候后臺(tái)代碼被中斷，沒(méi)有就行close();