这是我必须要做的事情:
<div class="Pictures zoom">
<a title="Productname 1" class="zoomThumbActive" rel="{gallery: 'gallery1', smallimage: '/images/2.24198/little_one.jpeg', largeimage: '/images/76.24561/big-one-picture.jpeg'}" href="javascript:void(0)" style="border-width:inherit;">
<img title="Productname 1" src="/images/24.245/mini-doge-picture.jpeg" alt="" /></a>
<a title="Productname 1" rel="{gallery: 'gallery1', smallimage: '/images/2.24203/small_one.jpeg', largeimage: '/images/9.5664/very-big-one-picture.jpeg'}" href="javascript:void(0)" style="border-width:inherit;">
<img title="Productname 1" src="/images/22.999/this-picture-is-very-small.jpeg" alt="" /></a>
<div>
使用以下Xpath:
/html//div[@class='Pictures zoom']/a/@rel
输出变为:
{gallery: 'gallery1', smallimage: '/images/2.24198/little_one.jpeg', largeimage: '/images/76.24561/big-one-picture.jpeg'}
{gallery: 'gallery1', smallimage: '/images/2.24203/small_one.jpeg', largeimage: '/images/9.5664/very-big-one-picture.jpeg'}
是否有可能过滤提取,所以如上所述,我只能得到这些:
/images/76.24561/big-one-picture.jpeg
/images/9.5664/very-big-one-picture.jpeg
我只想保留largeimage: '
和'}
致以最诚挚的问候,
刘康答案 0 :(得分:1)
使用substring-before
和substring-after
剪切您不想要的部分。
使用 XPath 1.0 ,这只能针对单个结果执行(因此您无法通过单个XPath调用获取一个文档中包含的所有URL)。此查询将返回第一个URL:
substring-before(substring-after((//@rel)[1], "largeimage: '"), "'")
XPath 2.0 允许您将函数作为轴步骤运行。此查询将返回您要查找的所有网址作为单个令牌:
//@rel/substring-before(substring-after(., "largeimage: '"), "'")