如何使用Selenium Webdriver捕获特定元素而不是整个页面的屏幕截图?

问题描述

当前，我正在尝试使用Selenium WebDriver捕获屏幕截图.但是我只能获取整个页面的屏幕截图.但是，我想要的只是捕获页面的一部分，或者仅捕获基于ID或任何特定元素定位符的特定元素. (例如，我希望捕获图像ID为"Butterfly"的图片)

Currently I'm trying to capture a screenshot using the Selenium WebDriver. But I can only obtain the whole page screen shot. However, what I wanted is just to capture a part of the page or perhaps just on specific element based on ID or any specific element locator. (For example, I wish to capture the picture with image id = "Butterfly")

有什么方法可以按选定的项目或元素来捕获屏幕截图吗?

Is there any way to capture a screenshot by selected item or element?

推荐答案

我们可以通过裁剪整个页面屏幕截图来获得元素屏幕截图，如下所示:

We can get the element screenshot by cropping entire page screenshot as below:

driver.get("http://www.google.com");
WebElement ele = driver.findElement(By.id("hplogo"));

// Get entire page screenshot
File screenshot = ((TakesScreenshot)driver).getScreenshotAs(OutputType.FILE);
BufferedImage  fullImg = ImageIO.read(screenshot);

// Get the location of element on the page
Point point = ele.getLocation();

// Get width and height of the element
int eleWidth = ele.getSize().getWidth();
int eleHeight = ele.getSize().getHeight();

// Crop the entire page screenshot to get only element screenshot
BufferedImage eleScreenshot= fullImg.getSubimage(point.getX(), point.getY(),
    eleWidth, eleHeight);
ImageIO.write(eleScreenshot, "png", screenshot);

// Copy the element screenshot to disk
File screenshotLocation = new File("C:\\images\\GoogleLogo_screenshot.png");
FileUtils.copyFile(screenshot, screenshotLocation);

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