xpath定位标签中最后一个元素(last())
<span class="comment-info">
<a href="https://www.douban.com/people/65610165/">Cotman</a>
<span class="user-stars allstar30 rating" title="还行"></span>
<span class="comment-time">2021-12-19 22:29:11</span>
</span>
提取元素2021-12-19 22:29:11
//span[@class="comment-info"]//span[last()]