当前位置：首页 > Java

java如何截图网页

2026-03-25 07:39:16Java

使用Selenium截取网页截图

Selenium是一个自动化测试工具，可以用于控制浏览器并截取网页截图。需要安装Selenium WebDriver和对应的浏览器驱动。

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.OutputType;
import org.apache.commons.io.FileUtils;
import java.io.File;

public class Screenshot {
    public static void main(String[] args) throws Exception {
        System.setProperty("webdriver.chrome.driver", "path/to/chromedriver");
        WebDriver driver = new ChromeDriver();
        driver.get("https://example.com");

        File screenshot = ((TakesScreenshot)driver).getScreenshotAs(OutputType.FILE);
        FileUtils.copyFile(screenshot, new File("screenshot.png"));

        driver.quit();
    }
}

使用HtmlUnit截取网页截图

HtmlUnit是一个无界面浏览器，可以用于网页截图，但需要配合其他库如Flying Saucer。

import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.html.HtmlPage;
import org.xhtmlrenderer.swing.Java2DRenderer;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;

public class HtmlUnitScreenshot {
    public static void main(String[] args) throws Exception {
        WebClient webClient = new WebClient();
        HtmlPage page = webClient.getPage("https://example.com");

        BufferedImage image = new Java2DRenderer(page, 1024, 768).getImage();
        ImageIO.write(image, "png", new File("screenshot.png"));

        webClient.close();
    }
}

使用第三方API截取网页截图

一些第三方服务提供网页截图API，可以通过HTTP请求获取截图。

import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

public class ApiScreenshot {
    public static void main(String[] args) throws Exception {
        String apiUrl = "https://www.screenshotapi.io/api?url=https://example.com";
        URLConnection connection = new URL(apiUrl).openConnection();
        InputStream inputStream = connection.getInputStream();

        FileOutputStream outputStream = new FileOutputStream("screenshot.png");
        byte[] buffer = new byte[2048];
        int length;
        while ((length = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, length);
        }
        outputStream.close();
        inputStream.close();
    }
}