import net.sf.image4j.codec.ico.ICODecoder; //导入依赖的package包/类
@Override
public void changed(ObservableValue<? extends State> observable, State oldState, State newState) {
	if (newState == Worker.State.SUCCEEDED) {
		try {
			//Determine the full url
			String favIconFullURL = getHostName(webEngine.getLocation()) + "favicon.ico";
			//System.out.println(favIconFullURL)
			
			//Create HttpURLConnection 
			HttpURLConnection httpcon = (HttpURLConnection) new URL(favIconFullURL).openConnection();
			httpcon.addRequestProperty("User-Agent", "Mozilla/5.0");
			List<BufferedImage> image = ICODecoder.read(httpcon.getInputStream());
			
			//Set the favicon
			facIconImageView.setImage(SwingFXUtils.toFXImage(image.get(0), null));
			
		} catch (Exception ex) {
			//ex.printStackTrace()
			facIconImageView.setImage(null);
		}
	}
}
 

import net.sf.image4j.codec.ico.ICODecoder; //导入依赖的package包/类
private ImageIcon decodeIcon(String url) throws IOException {
    try (InputStream stream = new URL(url).openStream()) {
        List<BufferedImage> images = ICODecoder.read(stream);
        for (BufferedImage image : images) {
            if (image.getWidth() == 16) return new ImageIcon(image);
        }
        return scaleImage(images.get(0));
    }
}
 

import net.sf.image4j.codec.ico.ICODecoder; //导入依赖的package包/类
private static BufferedImage read(URL imageSource, boolean isIcon) throws Exception {
    if (isIcon) {
        java.util.List<BufferedImage> images = ICODecoder.read(imageSource.openStream());
        return images.get(0);
    } else {
        return ImageIO.read(imageSource);
    }
}
 

import net.sf.image4j.codec.ico.ICODecoder; //导入依赖的package包/类
public static void main(String[] args) throws Exception {
    Image2ascii convert = new Image2ascii();
    java.util.List<BufferedImage> images = ICODecoder.read(new File("/home/luog/favicon.ico"));
    String s = convert.convert(images.get(0), true);
    if (images.size() > 0) {
        for (int i = 0; i < images.size(); ++i) {
            ImageIO.write(images.get(i), "png", new File("/home/luog/f" + i + ".png"));
        }
    }
    IO.writeContent(s, new File("/home/luog/a.txt"));
}
 

import net.sf.image4j.codec.ico.ICODecoder; //导入依赖的package包/类
/**
 * Fetch a favicon for a given location.
 *
 * @param browserLoc the location of a browser for which a favicon is to be fetched.
 * @return the favicon for the browser location or null if no such favicon could be determined.
 */
public ImageView fetchFavIcon(final String browserLoc) {
    // fetch the favicon from cache if it is there.
    final String serverRoot = findRootLoc(browserLoc);
    ImageView cachedFavicon = faviconCache.get(serverRoot);
    if (cachedFavicon != null) return cachedFavicon;

    // ok, it wasn't in the cache, create a placeholder, to be used if the site doesn't have a favicon.
    final ImageView favicon = new ImageView();

    // if the serverRoot of the location cannot be determined, just return the placeholder.
    if (serverRoot == null) return favicon;

    // store the new favicon placeholder in the cache.
    faviconCache.put(serverRoot, favicon);

    // lazily fetch the real favicon.
    final Task<Image> task = new Task<Image>() {
        @Override
        protected Image call() throws Exception {
            // fetch the favicon from the server if we can.
            URL url = new URL(serverRoot + "/favicon.ico");

            // decode the favicon into an awt image.
            List<BufferedImage> imgs = ICODecoder.read(url.openStream());

            // if the decoding was successful convert to a JavaFX image and return it.
            if (imgs.size() > 0) {
                return ResourceUtil.bufferedImageToFXImage(imgs.get(0), 0, 16, true, true);
            } else {
                return null;
            }
        }
    };

    // replace the placeholder in a favicon whenever the lazy fetch completes.
    task.valueProperty().addListener((observableValue, oldImage, newImage) -> {
        if (newImage != null) {
            favicon.setImage(newImage);
        }
    });

    threadpool.execute(task);

    return favicon;
}
 

import net.sf.image4j.codec.ico.ICODecoder; //导入依赖的package包/类
private static Image getIconImage(InputStream in) throws IOException {
    List<BufferedImage> images = ICODecoder.read(in);
    BufferedImage image = Collections.max(images, Comparator.comparingInt(BufferedImage::getWidth));
    return SwingFXUtils.toFXImage(image, null);
}
 

import net.sf.image4j.codec.ico.ICODecoder; //导入依赖的package包/类
/**
 * Fetch a favicon for a given location.
 *
 * @param browserLoc the location of a browser for which a favicon is to be fetched.
 * @return the favicon for the browser location or null if no such favicon could be determined.
 */
public ImageView fetchFavIcon(final String browserLoc) {
    // fetch the favicon from cache if it is there.
    final String serverRoot = findRootLoc(browserLoc);
    
    
    ImageView cachedFavicon = faviconCache.get(serverRoot);
    if (cachedFavicon != null) return cachedFavicon;

    // ok, it wasn't in the cache, create a placeholder, to be used if the site doesn't have a favicon.
    final ImageView favicon = new ImageView();

    // if the serverRoot of the location cannot be determined, just return the placeholder.
    if (serverRoot == null) return favicon;

    // store the new favicon placeholder in the cache.
    faviconCache.put(serverRoot, favicon);

    // lazily fetch the real favicon.
    final Task<Image> task = new Task<Image>() {
        @Override
        protected Image call() throws Exception {
            // fetch the favicon from the server if we can.
            URL url = new URL(serverRoot + "/favicon.ico");

            // decode the favicon into an awt image.
            List<BufferedImage> imgs = ICODecoder.read(url.openStream());

            // if the decoding was successful convert to a JavaFX image and return it.
            if (imgs.size() > 0) {
                return ResourceUtil.bufferedImageToFXImage(imgs.get(0), 0, 16, true, true);
            } else {
                return null;
            }
        }
    };

    // replace the placeholder in a favicon whenever the lazy fetch completes.
    task.valueProperty().addListener((observableValue, oldImage, newImage) -> {
        if (newImage != null) {
            favicon.setImage(newImage);
        }
    });

    threadpool.execute(task);

    return favicon;
}