java - 如何处理 selenium Xpath 中的条件

Question

我正在 Web View 中的表格中搜索文本，如果文本不存在，它应该转到 else 并相应地执行我的操作，而不是这样，它会抛出 NoSuchElementException 异常。如何处理这个。当找不到用于比较的数据时，Web 驱动程序返回什么值。

注意:如果它在表中找到 title 变量的匹配值

WebElement table = driver.findElement(By.xpath("html/body/form/div[6]/div/div[1]/div[2]/fieldset/div[1]/div/div[1]/div/table"));

// find the row
WebElement customer = table.findElement(By.xpath("//tbody/tr/td[contains(text(), '"+title+"')]/following-sibling::td/a[text()='Detail']"));
if(customer != null){ // how do I compare here.
    //System.out.println("This is your TITLE " +customer.getText());
    }else{
// my further code for failed case. 
}

Answer 1

如果您尝试查找不存在的元素，则会抛出 NoSuchElementException。因此，使用 try/catch 机制来定义 else 情况:

WebElement table = driver.findElement(By.xpath("html/body/form/div[6]/div/div[1]/div[2]/fieldset/div[1]/div/div[1]/div/table"));
try {
    WebElement customer = table.findElement(By.xpath("//tbody/tr/td[contains(text(), '"+title+"')]/following-sibling::td/a[text()='Detail']"));
    System.out.println("This is your TITLE " +customer.getText()); 
}
catch(NoSuchElementException e) {
    // code for failed case
}

或者，您可以检查元素是否存在，然后应用常规 if/else:

WebElement table = driver.findElement(By.xpath("html/body/form/div[6]/div/div[1]/div[2]/fieldset/div[1]/div/div[1]/div/table"));
int amount = table.findElements(By.xpath("//tbody/tr/td[contains(text(), '"+title+"')]/following-sibling::td/a[text()='Detail']")).size();
if(amount > 0)
    // element exists
else
    // element doesn't exist