如何在Selenium WebDriver for Java中按索引查找元素

问题描述：

我正在尝试使Google图片页面自动化:

Im trying to automate the Google Images page:

所有图像都具有相同的类，但没有id，并且结果在不断变化.因此，我希望能够根据索引单击图像.

All the images have the same class but no id and the results are constantly changing. So I would like to be able to click on the images based on their index.

我知道如何在C#中执行此操作...但是我无法弄清楚如何在Java中的索引中指定.当我尝试选择一个大于0的索引时，出现和IndexOutOfBounds错误，但我不知道为什么

I know how to do it in C#...but I cant figure out how to specify in the index in Java. When I try to select an index beyond 0, I get and IndexOutOfBounds error, but i cant figure out why

WebElement image = chromeDriver.findElement(By.className("rg_di"));
WebElement imageLink = image.findElements(By.tagName("a")).get(1);
imageLink.click();

这是我正在使用的整个代码...任何帮助将不胜感激:

Here is the entire code im using...any help would be appreciated:

    System.setProperty("webdriver.chrome.driver", "/Users/user/chromedriver");
    WebDriver chromeDriver = new ChromeDriver();
    chromeDriver.get("http://www.google.com");

    WebElement searchBox = chromeDriver.findElement(By.id("gbqfq"));
    searchBox.sendKeys("pluralsight");
    searchBox.sendKeys(Keys.RETURN);

    chromeDriver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);

    WebElement imagesLink = chromeDriver.findElement(By.linkText("Images"));
    imagesLink.click();

    WebElement image = chromeDriver.findElement(By.className("rg_di"));
    WebElement imageLink = image.findElements(By.tagName("a")).get(1);
    imageLink.click();

任何帮助将不胜感激

答

在您的代码中:

WebElement image = chromeDriver.findElement(By.className("rg_di"));

将返回在页面上找到的带有"rg_di"类的第一个元素.

will return the first element found on the page with a class of "rg_di".

该元素中只有一个< a href = .../a> 标记.

That element has only one <a href=... /a> tag in it.

您正在获取IndexOutOfBounds异常，因为您正在请求 second 一个(基于零的索引).如果您将最终的WebElement更改为:

You are getting an IndexOutOfBounds exception because you are asking for the second one (zero based indexing). If you change your final WebElement to:

WebElement imageLink = image.findElements(By.tagName("a")).get(0);

只需很小的改动，代码就可以为您工作.

The code should work for you with that small change.

这是我的快速版本(请注意，缺少存储元素，我只需要做一件事情作为WebElements):

This is my quick version (note the lack of storing elements I only need to do one thing with as WebElements):

public static void main(String[] args) {
    // I don't have Chrome installed >.<
    WebDriver driver = new FirefoxDriver();

    driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);

    driver.get("http://www.google.com");

    WebElement searchBox = driver.findElement(By.id("gbqfq"));
    searchBox.sendKeys("pluralsight");
    searchBox.sendKeys(Keys.RETURN);

    driver.findElement(By.linkText("Images")).click();

    WebElement image = driver.findElement(By.className("rg_di"));
    image.findElements(By.tagName("a")).get(0).click();

    // super-shortened version:
    // driver.findElement(By.className("rg_di")).findElements(By.tagName("a")).get(0).click();
}

如何在Selenium WebDriver for Java中按索引查找元素

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