import org.junit.Test;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.chrome.ChromeOptions;
import ru.yandex.qatools.ashot.AShot;
import ru.yandex.qatools.ashot.shooting.ShootingStrategies;

import javax.imageio.ImageIO;
import
 
 java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

public class DemoApplicationTests {

    @Test
    public void contextLoads() throws InterruptedException, IOException {
        System.setProperty("webdriver.chrome.driver", "D:\\chromedriver.exe");
        ChromeOptions chromeOptions 
 
= new ChromeOptions();
        //設置為 headless 模式 （必須）
        //chromeOptions.addArguments("--headless");
        final WebDriver driver = new ChromeDriver(chromeOptions);

        driver.manage().window().maximize();
        driver.get("https://autohome.com.cn/");

        // Let the user actually see something!
 

        Thread.sleep(5000);
        BufferedImage bi = new AShot()
                .shootingStrategy(ShootingStrategies.viewportPasting(100))
                .takeScreenshot(driver).getImage();
        ImageIO.write(bi, "png", new File("C:/test.png"));
        driver.quit();
    }

}

<dependency>
    <groupId>ru.yandex.qatools.ashot</groupId>
    <artifactId>ashot</artifactId>
    <version>1.5.2</version>
</dependency>

使用AShot進行網頁全頁截圖