xpath java html element siblings

Question

我正在尝试获取某些元素的值。我能够得到第一个但是“跟随兄弟”

WebElement mainelem = url.findElement(By.tagName("main"));
WebElement piclinks = mainelem.findElement(By.xpath("//a[starts-with(@href, '/p/')]"));

XPATH: //*[@id="react-root"]/section/main/article/div[1]/div/div[1]/div[1]/a

usage of my following sibling:
WebElement piclinks = mainelem.findElement(By.xpath("//a[starts-with(@href, '/p/')]/following-sibling::a"));

我在Java中遇到的错误是：

无效的选择器：无法找到元素

我一直在尝试很多东西来解决这个问题，但它没有用。

最后是html代码：

<section data-reactroot="" class="_tlwfg _8f735"><main class="_6ltyr _rnpza" role="main"><article class="_3n7ri"><header class="_1l53n"><h1 class="_totu9"><!-- react-text: 7448 -->#<!-- /react-text --><!-- react-text: 7449 -->funny<!-- /react-text --></h1><span class="_s53mj"><!-- react-text: 7451 --><!-- /react-text --><span class="_bkw5z">101,244,153</span><!-- react-text: 7453 --> posts<!-- /react-text --></span></header><div class="_5kftd"><h2 class="_sai17">Top posts</h2><div class="_nljxa"><div class="_myci9"><div class="_8mlbc _vbtk2 _t5r8b"><a href="/p/BWfHui8FLgi/?tagged=funny"><div class="_22yr2"><div class="_jjzlb"><img alt="lol" class="_icyx7" id="pImage_434" src="https://scontent-frx5-1.cdninstagram.com/t51.2885-15/s320x320/e35/c0.50.1080.1080/20065328_164651100746803_6799075315676086272_n.jpg"></div><!-- react-empty: 7463 --><div class="_ovg3g"></div></div></a></div><div class="_8mlbc _vbtk2 _t5r8b"><a href="/p/BWeaZpylSXA/?tagged=funny"><div class="_22yr2"><div class="_jjzlb"><img alt="Supreme×Louis Vuitton
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Answer 1

如果您无法修改HTML，则无法在此处使用following-sibling机制。事实是，每个<a>链接都没有任何兄弟姐妹 - 他们是<div>个父母的单身孩子。我还注意到每个父级也包含在前一个父级<div>中，从而产生一组嵌套的链接。

我认为您最好的选择是使用WebElement.findElements()方法来查找<a>元素列表并循环处理结果。 注意：我还在xpath的开头添加了'.'字符，仅搜索mainelem结果的上下文中。

WebElement mainelem = url.findElement(By.tagName("main"));
List<WebElement> piclinks = mainelem.findElements(By.xpath(".//a[starts-with(@href, '/p/')]"));

for (WebElement picLink : piclinks) {
    //... picLink processing...
}