java实现PNG图片任意角度旋转

虽然我不懂，但我大受震撼；

private void rotate(File file, int angel) throws IOException {
   
		Image image = ImageIO.read(file);
		int width = image.getWidth(null);
		int height = image.getHeight(null);

		Rectangle rect = calcRotatedSize(new Rectangle(new Dimension(width, height)), angel);
		//因为我需要旋转的是png格式的透明背景图片，所以需要使用TYPE_INT_ARGB.
		BufferedImage bi = new BufferedImage(rect.width, rect.height,</