如何使用 Java 在 Selenium WebDriver 中计算 HTML 子标签

Question

In Selenium JAVA WebDriver - How can I count child tags? Example:

<div class="subcategory_container">
  <div class="products_container">
     <div class="product_row">
       <form class="product_container">
       <form class="product_container">
       <form class="product_container">
     </div>
   </div>
</div>

I want to count how many form tag are there under product_row div ? Thanks

Answer 1

You find the parent div first, then locate all target elements, then count them.

List<WebElement> forms = driver.findElements(By.cssSelector(".product_row form"));
int count = forms.size();

Answer 2

Here are two solutions:

You could either select by xpath

driver.findElements(By.xpath("//div[@class='product_row']/form"))

or you could select by CSS query as mentioned by user1177636

driver.findElements(By.cssSelector(".product_row>form"))

Answer 3

You can find the size of elements by using the following statement:

System.out.println(driver.findElements(By.xpath("//div[@class='product_row']/form")).size());

Where .findElements method returns count value that all elements in that a page consists with xpath //div[@class='product_row']/form

In your case it will return "3" as result

Answer 4

通常，我会使用某种方法来查找我想要的所有元素，无论是使用 xpath 还是 css 选择器，然后只计算返回了多少结果。

Answer 5

Every element has an attribute called childElementCount. You can use WebElement.getAttribute() function to get an immediate value.

WebElement element = driver.findElement(By.className("product_row"));
int numberOfChilds = Integer.parseInt(element.getAttribute("childElementCount"));

Because getAttribute() returns a String, we have to cast it to an int.