Redis

 	/**
     * 发表文章  （Redis in Action)
     *
     * @param conn  redis连接
     * @param user  用户key
     * @param title title key
     * @param link  link key
     * @return 文章id
     */
    public String postArticle(Jedis conn, String user, String title, String link) {
        //自增id
        String articleId = String.valueOf(conn.incr("article:"));

        //对文章投票
        String voted = "voted:" + articleId;
        conn.sadd(voted, user);
        conn.expire(voted, 7 * 86400);

        //发表文章
        long now = System.currentTimeMillis() / 1000;
        String article = "article:" + articleId;
        HashMap<String, String> articleData = new HashMap<String, String>();
        articleData.put("title", title);
        articleData.put("link", link);
        articleData.put("user", user);
        articleData.put("now", String.valueOf(now));
        articleData.put("votes", "1");
        //保存hash值
        conn.hmset(article, articleData);
        //得分排序（投票数X默认分值）
        conn.zadd("score:", now + 432, article);
        //发布时间排序
        conn.zadd("time:", now, article);

        return articleId;
    }