【java】如何获得图片的像素点

    public static int[][] getImageGRB(String filePath) {
        int[][] result=null;
        File file = new File(filePath);
        if (!file.exists()) {
            return result;
        }
        try {
            BufferedImage bufImg = ImageIO.read(file);
            int width = bufImg.getWidth();
            int height = bufImg.getHeight();
            result=new int[width][height];
            for(int i=0;i<height;i++){
                for(int j=0;j<width;j++){
                    result[i][j]=bufImg.getRGB(j,i)&0xFFFFFF;
                }
            }
        } catch (Exception e) {
        }
        return result;
    }