上传文件写入硬盘

if(!isFileForm){
     if(fileName != null && !"".equals(fileName)){
      //创建文件路径
      String uploadPath = request.getSession().getServletContext().getRealPath("/upload");
      //创建file对象
      File file = new File(uploadPath,oriFileName);
      fi.write(file);
     }
    }