Xpath包含变量

Question

我的脑子已经有一段时间了，似乎无法弄清楚..我希望点击我的雅虎帐户中的电子邮件。如果我指定我正在寻找的值，它可用于查找第一封电子邮件。我需要能够根据主题找到任何电子邮件。 如果它包含“POST / EDIT / DELETE：* 2007 NO DAMAGE TOYOTA CAMRY XLE”，则可以点击第一个主题

wait.until(ExpectedConditions.elementToBeClickable(By.xpath("//*[contains(text(),'POST/EDIT/DELETE: *2007 NO DAMAGE TOYOTA CAMRY XLE')]"))).click();

另一方面，如果我将其变为变量，则不会：

String emailtitle = "POST/EDIT/DELETE: "+ "*2007 NO DAMAGE TOYOTA CAMRY XLE";//Build email string
System.out.println("Email Title is: "+ emailtitle);
wait.until(ExpectedConditions.elementToBeClickable(By.xpath("//*[contains(text(),'" + emailtitle + "')]"))).click();

我正在搜索的地方：

<div class="subj" role="gridcell" id="yui_3_16_0_ym19_1_1509685997190_1725"> <span dir="" class="subject " title="POST/EDIT/DELETE: *2007 NO DAMAGE TOYOTA CAMRY XLE ( cars &amp; trucks - by owner)" id="yui_3_16_0_ym19_1_1509685997190_1724"> POST/EDIT/DELETE: *2007 NO DAMAGE TOYOTA CAMRY XLE ( cars &amp; trucks - by owner) </span>  <span class="thread-snippet" role="gridcell" dir="" id="yui_3_16_0_ym19_1_1509685997190_1754"> IMPORTANT - FURTHER ACTION IS REQUIRED TO COMPLETE YOUR REQUEST !!! FOLLOW THE WEB ADDRESS BELOW TO: PUBLISH YOUR AD EDIT (OR CONFIRM AN EDIT TO) YOUR AD VERIFY YOUR EMAIL ADDRESS DELETE YOUR AD If not clickable, please copy and paste the address to your browser: THIS LINK IS A PASSWORD. DO NOT SHARE IT - anyone who has a copy of this link can edit or delete your posting. link PLEASE KEEP THIS EMAIL - you may need it to manage your posting! Your posting </span>  </div>

理想情况下，我希望能够根据电子邮件的标题更改电子邮件标题。所以使用变量是必须的。但由于某些原因，当我将它用作变量时，它不会返回值。这会发生什么原因吗？

Answer 1

1. 尽量将String emailtitle 简单化为：

   String emailtitle = "POST/EDIT/DELETE: *2007 NO DAMAGE TOYOTA CAMRY XLE";
   

2. 而不是：

   wait.until(ExpectedConditions.elementToBeClickable(By.xpath("//*[contains(text(),'" + emailtitle + "')]"))).click();
   

   您可以尝试：

   wait.until(ExpectedConditions.elementToBeClickable(By.xpath("//span[.='" + emailtitle + "']")));
   

如果找到，

3. wait将返回该元素。因此，请在WebElement的帮助下，在下一步中调用click()。

   WebElement elem = wait.until(ExpectedConditions.elementToBeClickable(By.xpath("//span[.='" + emailtitle + "']")));
   elem.click();
   

Answer 2

尝试一次

String emailtitle = "POST/EDIT/DELETE: "+ "*2007 NO DAMAGE TOYOTA CAMRY XLE";//Build email string
System.out.println("Email Title is: "+ emailtitle);   
wait.until(ExpectedConditions.visibilityOfElementLocated(By.xpath("//*[text(),emailtitle]")));  
driver.findElement(By.xpath("//*[text(),emailtitle]")).click();

如果xpath返回多个元素，则尝试根据

之类的索引搜索特定元素

...By.xpath("
(//*[text(),emailtitle]")[1]).click()//try with different like 0,1,2

正如你在下面的图片中看到的，我的xpath返回了7个匹配，所以通过索引我试图获取我的特定元素，然后在使用新的xpath后我可以点击元素

Answer 3

最好避免使用字符串连接构造XPath表达式。最好的情况是，由于你在每次执行表达式时重新编译表达式，因此引入与引号混淆和性能问题，你可能会遇到像这样的调试麻烦。在最坏的情况下，您的代码对注入攻击持开放态度。

我不太确定你问题中的标签是什么XPath API，但是大多数XPath API允许你编译包含变量引用的表达式：

x = xpath.compile("//something[contains(@att, $value)]");

然后在执行时为参数提供一个值，如：

y = x.load();
y.setParam("value", theValueIAmLookingFor)
y.evaluate();