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]);
}
}