解决layui上传文件提示上传异常,实际文件已经上传成功的问题

 @ResponseBody @RequestMapping("/web/upload") public JSONObject uploadSourceData(@RequestParam(value="file") MultipartFile file ){ String filePath = “”; String fileName = filePath+System.currentTimeMillis()+"_"+file.getOriginalFilename(); //上传后的文件名  原始文件名加上时间戳 FileOutputStream out; JSONObject resObj = new JSONObject(); resObj.put("msg", "ok"); try { out = new FileOutputStream(new File(fileName)); IOUtils.copy(file.getInputStream(), out); out.close(); } catch (Exception e) { // TODO Auto-generated catch block resObj.put("msg", "error"); e.printStackTrace(); } return resObj; }