标签：style io ar color os sp java for on
public static void main(String[] args) throws IOException{ Image img = Toolkit.getDefaultToolkit().getImage("C:\\google.jpg"); BufferedImage bi_scale = toBufferedImage(img); ImageIO.write(bi_scale, "jpg",new File("C:\\2.jpg"));} public static BufferedImage toBufferedImage(Image image) { if (image instanceof BufferedImage) { return (BufferedImage)image; } // This code ensures that all the pixels in the image are loaded image = new ImageIcon(image).getImage(); // Determine if the image has transparent pixels; for this method‘s // implementation, see e661 Determining If an Image Has Transparent Pixels //boolean hasAlpha = hasAlpha(image); // Create a buffered image with a format that‘s compatible with the screen BufferedImage bimage = null; GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); try { // Determine the type of transparency of the new buffered image int transparency = Transparency.OPAQUE; /* if (hasAlpha) { transparency = Transparency.BITMASK; }*/ // Create the buffered image GraphicsDevice gs = ge.getDefaultScreenDevice(); GraphicsConfiguration gc = gs.getDefaultConfiguration(); bimage = gc.createCompatibleImage( image.getWidth(null), image.getHeight(null), transparency); } catch (HeadlessException e) { // The system does not have a screen } if (bimage == null) { // Create a buffered image using the default color model int type = BufferedImage.TYPE_INT_RGB; //int type = BufferedImage.TYPE_3BYTE_BGR;//by wang /*if (hasAlpha) { type = BufferedImage.TYPE_INT_ARGB; }*/ bimage = new BufferedImage(image.getWidth(null), image.getHeight(null), type); } // Copy image to buffered image Graphics g = bimage.createGraphics(); // Paint the image onto the buffered image g.drawImage(image, 0, 0, null); g.dispose(); return bimage;}标签：style io ar color os sp java for on
原文地址：http://www.cnblogs.com/geminer/p/4121336.html
