spring mvc上传例子

 @RequestMapping(params = "method=fileUpload")public String fileUpload(@RequestParam("fileName") MultipartFile upfile,ModelMap map,HttpServletRequest request) throws FileNotFoundException,IOException, SQLException{      /* 写入固定目录方式       * File file = new File("F:\\"+upfile.getOriginalFilename());         byte[] bytes =  upfile.getBytes();       FileOutputStream fos = new FileOutputStream(file);         fos.write(bytes);         fos.flush();         fos.close();         return null;*/    //写入库方式       byte[] fileData = upfile.getBytes();               SysUploadFile form = new SysUploadFile();form.setAccessories(fileData);form.setFile_name(upfile.getOriginalFilename());sysUploadService.fileUpload(form);return "apps/sysupload/success";}