java如何用byte[]构造BufferedImage,处理之后怎么再输出为byte[]?

Question

java不是很熟悉，特别是IO，求有经验的同学帮帮忙

Answer 1

1.byte[] -> BufferedImage
BufferedImage bi1 = ImageIO.read(new ByteArrayInputStream(byte[]));

2.BufferedImage -> byte[]
ByteArrayOutputStream out = new ByteArrayOutputStream();
ImageIO.write(img, "PNG", out);
out.toByteArray()