如下所示：

复制代码 代码如下:

private void readImage(String filename) throws FileNotFoundException, IOException {

FileInputStream fIn = new FileInputStream(filename);

//需要替换这边的两句：

JPEGImageDecoder jpeg_decode = JPEGCodec.createJPEGDecoder(fIn);

BufferedImage image = jpeg_decode.decodeAsBufferedImage();

width = image.getWidth();

height = image.getHeight();

int[] rgbdata = new int[width * height];

image.getRGB(0,0,width,height,rgbdata,0,width);

bytes = new byte[rgbdata.length];

doubles = new double[rgbdata.length];

for (int i = 0; i < bytes.length; i++) {

bytes[i] = (byte) (rgbdata[i] & 0xFF);

doubles[i] = (double)(rgbdata[i]);

}

}