code: public static void removeInfo(HttpServletRequest req) {
  		try {
  			HttpSession sess = req.getSession(false);
  			if (null != sess) {
  				sess.removeAttribute(UploadInfo.SESSION_NAME);
  			}
  		} catch (Throwable e) {
  		}
  	}
docs: 从当前会话中移除进度对象
  
  @param req
  请求对象