2
绝对的XPath我使用Javascript在下面的代码检索Web元素的绝对XPath
:获取网页元素
public String getAbsoluteXPath(WebDriver driver)
{
return (String) driver.executeScript(
"function absoluteXPath(element) {"+
"var comp, comps = [];"+
"var parent = null;"+
"var xpath = '';"+
"var getPos = function(element) {"+
"var position = 1, curNode;"+
"if (element.nodeType == Node.ATTRIBUTE_NODE) {"+
"return null;"+
"}"+
"for (curNode = element.previousSibling; curNode; curNode = curNode.previousSibling){"+
"if (curNode.nodeName == element.nodeName) {"+
"++position;"+
"}"+
"}"+
"return position;"+
"};"+
"if (element instanceof Document) {"+
"return '/';"+
"}"+
"for (; element && !(element instanceof Document); element = element.nodeType == Node.ATTRIBUTE_NODE ? element.ownerElement : element.parentNode) {"+
"comp = comps[comps.length] = {};"+
"switch (element.nodeType) {"+
"case Node.TEXT_NODE:"+
"comp.name = 'text()';"+
"break;"+
"case Node.ATTRIBUTE_NODE:"+
"comp.name = '@' + element.nodeName;"+
"break;"+
"case Node.PROCESSING_INSTRUCTION_NODE:"+
"comp.name = 'processing-instruction()';"+
"break;"+
"case Node.COMMENT_NODE:"+
"comp.name = 'comment()';"+
"break;"+
"case Node.ELEMENT_NODE:"+
"comp.name = element.nodeName;"+
"break;"+
"}"+
"comp.position = getPos(element);"+
"}"+
"for (var i = comps.length - 1; i >= 0; i--) {"+
"comp = comps[i];"+
"xpath += '/' + comp.name.toLowerCase();"+
"if (comp.position !== null) {"+
"xpath += '[' + comp.position + ']';"+
"}"+
"}"+
"return xpath;"+
"} return absoluteXPath(arguments[0]);", this.element);
}
一般情况下,这将产生正确的结果。但是,如果我导航到stackoverflow.com并尝试检索XPath ID为.//*[@id='hot-network-questions']/h4/a
(“热网络问题”)的元素的XPath,则实际/预期XPath(根据Firebug
)为:html/body/div[3]/div/div[3]/div[3]/h4/a
但是,此脚本错误地生成值为:/html[1]/body[1]/div[3]/div[1]/div[3]/div[4]/h4[1]/a[1]
注意div [3]和div [4]之间的区别。
这是你的脚本中的一个非常微妙的错误,或者它只是绝对'xpaths'的症状是不可靠的。您的结果在相同的加载页面上有所不同吗?或者它是不同的浏览器实例,导航到网站产生不同的结果?如果它不是同一个实例,那么我的猜测是这个页面在第二次通过时略有不同。 – mrfreester
为什么你需要绝对xpath? – lauda