从零开始搭建博客03----本周热议处理（redis 有序列表处理）

@Override
    public void initIndexWeekRank() {
//        查库获取最近7天的所有文章
        List<Post> last7DayPosts = this.list(new QueryWrapper<Post>()
                .ge("created", DateUtil.offsetDay(new Date(), -7).toJdkDate())
                .gt("comment_count", 0)
                .select("id, title, user_id, comment_count, view_count, created"));
//        然后把文章的评论数量作为有序集合的分数，文章id作为ID存储到zset中。
        for (Post post : last7DayPosts) {
            String key = "day_rank" + DateUtil.format(post.getCreated(), DatePattern.PURE_DATE_PATTERN);
//            设置有效期,7天之内有效
            long between = DateUtil.between(new Date(), post.getCreated(), DateUnit.DAY);
            long expireTime = (7 - between) * 24 * 60 * 60;
//            缓存文章到set中，评论数量作为排行标准
            redisUtil.zSet(key, post.getId(), post.getCommentCount());
            //设置有效期
            redisUtil.expire(key, expireTime);
//            缓存文章基本信息（hash结构）
            this.hashCachePostIdAndTitle(post);
        }
//        7天阅读相加
        this.zUnionAndStroreLast7DaysForWeekRand();
    }

/**
     * hash结构缓存文章标题和id
     *
     * @param post
     */
    private void hashCachePostIdAndTitle(Post post) {
        boolean isExist = redisUtil.hasKey("rank_post_" + post.getId());
        if (!isExist) {
            long between = DateUtil.between(new Date(), post.getCreated(), DateUnit.DAY);
            long expireTime = (7 - between) * 24 * 60 * 60;
//            缓存文章基本信息
            redisUtil.hset("rank_post_" + post.getId(), "post:id", post.getId(), expireTime);
            redisUtil.hset("rank_post_" + post.getId(), "post:title", post.getTitle(), expireTime);
        }
    }
    /**
     * 把最近7天的文章评论数量统计一下
     * 用于首页的7天评论排行榜
     */
    public void zUnionAndStroreLast7DaysForWeekRand() {
        String prifix = "day_rank";
        List<String> keys = new ArrayList<>();
        String key = prifix + DateUtil.format(new Date(), DatePattern.PURE_DATE_PATTERN);
        for (int i = -7; i < 0; i++) {
            Date date = DateUtil.offsetDay(new Date(), i).toJdkDate();
            keys.add(prifix + DateUtil.format(date, DatePattern.PURE_DATE_PATTERN));
        }
        redisUtil.zUnionAndStore(key, keys, "last_week_rank");
    }

@Override
    public void incrZsetValueAndUnionForLastWeekRank(Long postId) {
        String dayRank = "day_rank" + DateUtil.format(new Date(), DatePattern.PURE_DATE_PATTERN);
//        文章阅读加一
        redisUtil.zIncrementScore(dayRank, postId, 1);
        this.hashCachePostIdAndTitle(this.getById(postId));
//      重新union最近7天
        this.zUnionAndStroreLast7DaysForWeekRand();
    }

<!--本周热议-->
<div th:fragment="weekPopular">
    <dl class="fly-panel fly-list-one" id="post-hots">
        <dt class="fly-panel-title">本周热议</dt>
        <script id="hostDd" type="text/html">
            {{#  layui.each(d.list, function(index, item){ }}
            <dd>
                <a href="/post/{{item.id}}">{{item.title}}</a>
                <span><i class="iconfont icon-pinglun1"></i>{{item.comment_count}}</span>
            </dd>
            {{#  }); }}
            {{#  if(d.list.length === 0){ }}
            <div class="fly-none">没有相关数据</div>
            {{#  } }}
        </script>
    </dl>
    <script>
        layui.use(['laytpl'], function () {
            var laytpl = layui.laytpl;
            var post_hosts = document.getElementById("post-hots");
            var tpl = document.getElementById("hostDd").innerHTML;
            var data = {};
            $.ajax({
                url: "/post/hosts",
                async: false,
                success: function (res) {
                    if (res.code == 0) {
                        data.list = res.data;
                    }
                }
            });
            laytpl(tpl).render(data, function (html) {
                post_hosts.innerHTML += html;
            });
        });
    </script>
</div>