code: public static void setPageInfos(final HttpServletRequest request, final PagingInfo info) {
  		request.setAttribute(KEY_KEY, info.getKey());
  		if (StringUtils.isEmpty(info.getUrl())) {
  			request.setAttribute(URL_KEY, request.getServletPath());
  		} else {
  			request.setAttribute(URL_KEY, info.getUrl());
  		}
  		request.setAttribute(TATAL_KEY, info.getTotal());
  		request.setAttribute(INDEX_KEY, info.getPageIndex());
  		request.setAttribute(SIZE_KEY, info.getPageSize());
  	}
docs: 保存分页信息。
  
  @param request
  请求
  @param info
  分页信息