网页快照 java 实现

cping1982 大哥真的很厉害愿意开源写代码给大家 先在的优秀程序员能想他一样的真少见 敬礼

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);

 }

 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google，最大保存为640x480的截图    frame.getContentPane().add(      new Main("http://blog.csdn.net/cping1982", 1024, 768),      BorderLayout.CENTER);    frame.setSize(800, 600);    // 仅初始化，但不显示    frame.invalidate();    frame.pack();    frame.setVisible(false);   }  });  NativeInterface.runEventPump(); }

}