code: public BufferedImage rotate() {
          BufferedImage dest = new BufferedImage(height, width,
                  BufferedImage.TYPE_INT_ARGB);
          for (int i = 0; i < width; i++)
              for (int j = 0; j < height; j++) {
                  dest.setRGB(height - j - 1, i, image.getRGB(i, j));
              }
          image = dest;
          return image;
      }
docs: 旋转90度旋转
  
  @return 对应图片