JAVA -上传PNG图片时获取黑色背景

File imageFile = new File("path/to/image.png");
BufferedImage image = ImageIO.read(imageFile);

int width = image.getWidth();
int height = image.getHeight();

for (int y = 0; y < height; y++) {
    for (int x = 0; x < width; x++) {
        int rgb = image.getRGB(x, y);
        int red = (rgb >> 16) & 0xFF;
        int green = (rgb >> 8) & 0xFF;
        int blue = rgb & 0xFF;
        
        if (red == 0 && green == 0 && blue == 0) {
            // 处理黑色背景的逻辑
        }
    }
}