public class Urlimage extendsJPanel {/*** jsp转jpg*/

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(建议事先保存网页的宽高，由于执行速度的问题，有时获得不到宽高)

final staticStringBuffer jsDimension;static{

jsDimension= newStringBuffer();

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 Urlimage(final String url, final int maxWidth, final int maxHeight,final String fileName,finalString path) {super(newBorderLayout());

JPanel webBrowserPanel= new JPanel(newBorderLayout());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(newWebBrowserAdapter() {//监听加载进度

public voidloadingProgressChanged(WebBrowserEvent e) {//当加载完毕时

if (e.getWebBrowser().getLoadingProgress() == 100) {

//建议在这里写一个死循环，一直执行直到获得网页的宽高位置，这里我就不写程序了

// while(){};

String result=(String) webBrowser.executeJavascriptWithResult(jsDimension.toString());//只想js代码，获得网页的宽和高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= newBufferedImage(imageSize.width, imageSize.height,

BufferedImage.TYPE_INT_RGB);//建立一个宽高颜色固定的图片容器

nativeComponent.paintComponent(image);//绘制图片，但有时候会数组越界，因为走的是线程和内部抛出异常，所以无法抓住

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//

final String fileNameLoc = "d:/huiyou21.jpg";

ImageIO.write(image,"jpg", newFile(fileNameLoc));//改动这里变换格式}catch(IOException ex) {

ex.printStackTrace();

}

}

}

}

);

add(panel, BorderLayout.SOUTH);

}

}