关于java绘图操作 圆角 抗锯齿

   /***
     *
     * @param srcFilePath 源图片文件路径
     * @param circularImgSavePath 新生成的图片的保存路径，需要带有保存的文件名和后缀
     * @param targetSize 文件的边长，单位：像素，最终得到的是一张正方形的图，所以要求targetSize<=源文件的最小边长
     * @param cornerRadius 圆角半径，单位：像素。如果=targetSize那么得到的是圆形图
     * @return  文件的保存路径
     * @throws IOException
     */
    public static String makeCircularImg(String srcFilePath, String circularImgSavePath,int targetSize, int cornerRadius) throws IOException {
        BufferedImage bufferedImage = ImageIO.read(new File(srcFilePath));
        BufferedImage circularBufferImage = roundImage(bufferedImage,targetSize,cornerRadius);
        ImageIO.write(circularBufferImage, "png", new File(circularImgSavePath));
        return circularImgSavePath;
    }

    private static BufferedImage roundImage(BufferedImage image, int targetSize, int cornerRadius) {
        BufferedImage outputImage = new BufferedImage(targetSize, targetSize, BufferedImage.TYPE_INT_ARGB);
        Graphics2D g2 = outputImage.createGraphics();
        g2.setComposite(AlphaComposite.Src);
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setColor(Color.WHITE);
        g2.fill(new RoundRectangle2D.Float(0, 0, targetSize, targetSize, cornerRadius, cornerRadius));
        g2.setComposite(AlphaComposite.SrcAtop);
        g2.drawImage(image, 0, 0, null);
        g2.dispose();
        return outputImage;
    }

抗锯齿相关设置

graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
graphics.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
graphics.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
shadowGraphics.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);