获取图像的JPEG渲染的内存表示

Question

我需要知道如何从java中加载的图像中获取字节数组。 BufferedImage似乎不提供任何产生字节数组的方法，那么我该怎么用？

Answer 1

BufferedImage bufferedImage; //assumed that you have created it already
ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
ImageIO.write(bufferedImage,"jpg", byteStream);
byte[] byteArray = byteStream.toByteArray();