@Override
    public List<File> collect(Date date) {
        List<String> hrefs = new ArrayList<>();
        try {
            LOG.debug("url: "+url);
            String paper = url + sf.format(date) + start;
            LOG.debug("paper: "+paper);
            Document document = Jsoup.connect(paper).get();
            
            LOG.debug("pdfCssQuery: " + pdfCssQuery);
            Elements elements = document.select(pdfCssQuery);
            for(Element element : elements){
                String href = element.attr("href");
                if(href != null && href.endsWith(".pdf")){
                    LOG.debug("报纸链接："+href);
                    href = href.replace("../../../", "");
                    LOG.debug("报纸链接："+href);
                    hrefs.add(paperPath+href);
                }else{
                    LOG.debug("不是报纸链接："+href);
                }
            }            
        } catch (IOException ex) {
            LOG.error("采集出错",ex);
        }
        return downloadPaper(hrefs);
    }