public synchronized int SelctUrls(String url) {
        int id = 0;
        try {
            ResultSet re = tags_ste.executeQuery("SELECT * from zhangyu_sca.article_urls WHERE (list_url = '" + url + "');");
            re.next();
            id = re.getInt("article_id");
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return id;
    }