java网页快照-网页转存为图片
个人觉得免费的java实现方式，网站空间，最方便的网页快照生成方式。可以生成大型网页的快照。非常棒！
使用代码前需要导入 jar包。需要三个jar包 ：swt-3.6M3-win32-win32-x86.jar，DJNativeSwing-SWT.jar,DJNativeSwing.jar
我的资源库可以下载
jar包下载地址 csdn下载 ：
运行环境：jdk1.6以上
import java.awt.BorderLayout;import java.awt.Dimension;import java.awt.FlowLayout;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;
import javax.imageio.ImageIO;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.SwingUtilities;
import chrriis.dj.nativeswing.swtimpl.NativeComponent;import chrriis.dj.nativeswing.swtimpl.NativeInterface;import chrriis.dj.nativeswing.swtimpl.components.JWebBrowser;import chrriis.dj.nativeswing.swtimpl.components.WebBrowserAdapter;import chrriis.dj.nativeswing.swtimpl.components.WebBrowserEvent;
public class Main 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;”);}
public Main(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);
}
停止每日在车水马龙的市井里忙碌的穿梭，
