last()怎么用不了

[BarryYang1]

String lastHref = Xsoup.compile("//li[last()]/p/span/a/@href").evaluate(Jsoup.parse(htmlStr)).get();
提示错误 Could not parse query '[last()]': unexpected token at 'last()'

[Jamie-0527]

“position()” seems to have the same problem

[Y-Meta]

last()用不了有什么好的替代方案吗！……