How to get screenshot of full webpage using Selenium and Java?

Question

How to take a screenshot of the entire web page (full-page screenshot), not only partial (top-to-bottom) using Selenium WebDriver?

My code:

Answer 1

For some pages I neeed to take screenshot of begin and end of page. So I use to take 2 screenshots:

public static String javaIoTmpDir = System.getProperty("java.io.tmpdir"); //tmp dir
//create screenshot
    driver.manage().window().fullscreen();
    //For large pages - body over 850 px highh - take addition screenshot of the end of page
    if (driver.findElements(By.id("panel_body")).size()>0) {
        WebElement body = driver.findElement(By.id("panel_body"));
        int bodyHight = body.getSize().getHeight();
        if (bodyHight > 850) {
            Robot robot = new Robot();
            robot.keyPress(KeyEvent.VK_END);
            robot.keyRelease(KeyEvent.VK_END);
            Thread.sleep(1000);
            File scrFile = ((TakesScreenshot) driver).getScreenshotAs(OutputType.FILE);
            String timePictureEnd = javaIoTmpDir+"\\scr_"+String.valueOf(System.currentTimeMillis())+getClass().toString().substring(getClass().toString().lastIndexOf(".qa.")+3)+".png";
            FileUtils.copyFile(scrFile, new File(timePictureEnd));
            robot.keyPress(KeyEvent.VK_HOME); //back to top page for next screen
            robot.keyRelease(KeyEvent.VK_HOME);
            Thread.sleep(1000);
        }
    }
    String timePicture = javaIoTmpDir+"\\scr_"+String.valueOf(System.currentTimeMillis())+getClass().toString().substring(getClass().toString().lastIndexOf(".qa.")+3)+".png";
    File scrFile = ((TakesScreenshot) driver).getScreenshotAs(OutputType.FILE);
    FileUtils.copyFile(scrFile, new File(timePicture));