开源Java库在服务器端生成网页缩略图

首先想到的是使用AWT捕获屏幕抓取（请参见下面的代码）。您可以查看捕获JEdi​​torPane，JDIC


WebBrowser控件或SWT
浏览器（通过AWT嵌入支持）。后两个嵌入了本机浏览器（IE，Firefox），因此引入了依赖性。JEdi​​torPane HTML支持从HTML
3.2停止。这些可能都无法在无头系统上工作。

import java.awt.Component;import java.awt.Graphics2D;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import javax.imageio.ImageIO;import javax.swing.JLabel;public class Capture {    private static final int WIDTH = 128;    private static final int HEIGHT = 128;    private BufferedImage image = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);    public void capture(Component component) {        component.setSize(image.getWidth(), image.getHeight());        Graphics2D g = image.createGraphics();        try { component.paint(g);        } finally { g.dispose();        }    }    private BufferedImage getScaledImage(int width, int height) {        BufferedImage buffer = new BufferedImage(width, height,     BufferedImage.TYPE_INT_RGB);        Graphics2D g = buffer.createGraphics();        try { g.drawImage(image, 0, 0, width, height, null);        } finally { g.dispose();        }        return buffer;    }    public void save(File png, int width, int height) throws IOException {        ImageIO.write(getScaledImage(width, height), "png", png);    }    public static void main(String[] args) throws IOException {        JLabel label = new JLabel();        label.setText("Hello, World!");        label.setOpaque(true);        Capture cap = new Capture();        cap.capture(label);        cap.save(new File("foo.png"), 64, 64);    }}