根据url生成网页截图。最近在网上看到一个使用DJnatvieSwing版本测试了可以使用。
需要使用的pom依赖有以下3个（第三个是64位操作系统需要添加。）
<dependency>
<groupId>com.hynnet</groupId> <artifactId>DJNativeSwing</artifactId> <version>1.0.0</version> </dependency> <dependency> <groupId>com.hynnet</groupId> <artifactId>DJNativeSwing-SWT</artifactId> <version>1.0.0</version> </dependency> <dependency> <groupId>org.eclipse.swt</groupId> <artifactId>org.eclipse.swt.win32.win32.x86_64</artifactId> <version>4.3</version> </dependency>。代码如下
/** * 功能：根据URL能截取整个网页的缩略图（保存为一个图片） * * */ public class ScreenshotUtils extends JPanel { /** * */ private static final long serialVersionUID = 1L; // 行分隔符 final static public String LS = System.getProperty("line.separator", "\n"); // 文件分割符 final static public String FS = System.getProperty("file.separator", "\\"); //以javascript脚本获得网页全屏后大小 final static StringBuffer jsDimension; static { jsDimension = new StringBuffer(); jsDimension.append("var width = 0;").append(LS); jsDimension.append("var height = 0;").append(LS); jsDimension.append("if(document.documentElement) {").append(LS); jsDimension.append( " width = Math.max(width, document.documentElement.scrollWidth);") .append(LS); jsDimension.append( " height = Math.max(height, document.documentElement.scrollHeight);") .append(LS); jsDimension.append("}").append(LS); jsDimension.append("if(self.innerWidth) {").append(LS); jsDimension.append(" width = Math.max(width, self.innerWidth);") .append(LS); jsDimension.append(" height = Math.max(height, self.innerHeight);") .append(LS); jsDimension.append("}").append(LS); jsDimension.append("if(document.body.scrollWidth) {").append(LS); jsDimension.append( " width = Math.max(width, document.body.scrollWidth);") .append(LS); jsDimension.append( " height = Math.max(height, document.body.scrollHeight);") .append(LS); jsDimension.append("}").append(LS); jsDimension.append("return width + ':' + height;"); } //DJNativeSwing组件请于http://djproject.sourceforge.net/main/index.html下载 public ScreenshotUtils(final String url, final int maxWidth, final int maxHeight) { super(new BorderLayout()); JPanel webBrowserPanel = new JPanel(new BorderLayout()); final String fileName = System.currentTimeMillis() + ".jpg"; final JWebBrowser webBrowser = new JWebBrowser(null); webBrowser.setBarsVisible(false); webBrowser.navigate(url); webBrowserPanel.add(webBrowser, BorderLayout.CENTER); add(webBrowserPanel, BorderLayout.CENTER); JPanel panel = new JPanel(new FlowLayout(FlowLayout.CENTER, 4, 4)); webBrowser.addWebBrowserListener(new WebBrowserAdapter() { // 监听加载进度 public void loadingProgressChanged(WebBrowserEvent e) { // 当加载完毕时 if (e.getWebBrowser().getLoadingProgress() == 100) { String result = (String) webBrowser .executeJavascriptWithResult(jsDimension.toString()); int index = result == null ? -1 : result.indexOf(":"); NativeComponent nativeComponent = webBrowser .getNativeComponent(); Dimension originalSize = nativeComponent.getSize(); Dimension imageSize = new Dimension(Integer.parseInt(result .substring(0, index)), Integer.parseInt(result .substring(index + 1))); imageSize.width = Math.max(originalSize.width, imageSize.width + 50); imageSize.height = Math.max(originalSize.height, imageSize.height + 50); nativeComponent.setSize(imageSize); BufferedImage image = new BufferedImage(imageSize.width, imageSize.height, BufferedImage.TYPE_INT_RGB); nativeComponent.paintComponent(image); nativeComponent.setSize(originalSize); // 当网页超出目标大小时 if (imageSize.width > maxWidth || imageSize.height > maxHeight) { //截图部分图形 image = image.getSubimage(0, 0, maxWidth, maxHeight); /*此部分为使用缩略图 int width = image.getWidth(), height = image .getHeight(); AffineTransform tx = new AffineTransform(); tx.scale((double) maxWidth / width, (double) maxHeight / height); AffineTransformOp op = new AffineTransformOp(tx, AffineTransformOp.TYPE_NEAREST_NEIGHBOR); //缩小 image = op.filter(image, null);*/ } try { // 输出图像 ImageIO.write(image, "jpg", new File(fileName)); } catch (IOException ex) { ex.printStackTrace(); } // 退出操作 System.exit(0); } } } ); add(panel, BorderLayout.SOUTH); } public static void main(String[] args) { NativeInterface.open(); SwingUtilities.invokeLater(new Runnable() { public void run() { // SWT组件转Swing组件，不初始化父窗体将无法启动webBrowser JFrame frame = new JFrame("以DJ组件保存指定网页截图"); // 加载指定页面，最大保存为640x480的截图 frame.getContentPane().add( new ScreenshotUtils("http://127.0.0.1:8080/public/article/detail/view?id=8a290217559ba2650155b988ac8725ed", 200, 550), BorderLayout.CENTER); frame.setSize(800, 600); // 仅初始化，但不显示 frame.invalidate(); frame.pack(); frame.setVisible(false); } }); NativeInterface.runEventPump(); } }