public static List<Request> convertToRequests(Collection<String> urls) {
        List<Request> requestList = new ArrayList<Request>(urls.size());
        for (String url : urls) {
            requestList.add(new Request(url));
        }
        return requestList;
    }
@param url url
@return new url
@deprecated
webmagic-core/src/main/java/us/codecraft/webmagic/utils/UrlUtils.java