java 图片圆角处理、背景透明化

/**图片圆角处理，背景透明化
     * @param srcImageFile 原图片
     * @param result  处理后图片
     * @param type   图片格式
     * @param cornerRadius  720为圆角
     */
    public  void makeRoundedCorner(File srcImageFile, File result, String type, int cornerRadius) {        
        try {
            BufferedImage bi1 = ImageIO.read(srcImageFile);
            
            // 根据需要是否使用 BufferedImage.TYPE_INT_ARGB
            BufferedImage image = new BufferedImage(bi1.getWidth(), bi1.getHeight(),
                    BufferedImage.TYPE_INT_ARGB);
      
            Ellipse2D.Double shape = new Ellipse2D.Double(0, 0, bi1.getWidth(), bi1
                    .getHeight());
             
            Graphics2D g2 = image.createGraphics();
            image = g2.getDeviceConfiguration().createCompatibleImage(bi1.getWidth(), bi1.getHeight(), Transparency.TRANSLUCENT);
            g2 = image.createGraphics();
            g2.setComposite(AlphaComposite.Clear);
            g2.fill(new Rectangle(image.getWidth(), image.getHeight()));
            g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC, 1.0f));
            g2.setClip(shape);
            // 使用 setRenderingHint 设置抗锯齿
            g2 = image.createGraphics();
            g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            g2.fillRoundRect(0, 0,bi1.getWidth(), bi1.getHeight(), cornerRadius, cornerRadius);
            g2.setComposite(AlphaComposite.SrcIn);
            g2.drawImage(bi1, 0, 0, bi1.getWidth(), bi1.getHeight(), null);
            g2.dispose();
            ImageIO.write(image, type, result);
        } catch (Exception e) {
            // TODO: handle exception
        }
    }
 /**图片圆角处理，背景透明化
     * @param srcImageFile 原图片