Convert bufferedimage into byte[] array, and the pro test is available

Sometimes we just want to base it on BufferedImage To get one byte[], So that it can be base64 code . At this time, the following methods can be considered , It can avoid generating pictures to disk , Read from disk and convert to byte[] Code again .

/** *  take BufferedImage Convert to byte[] * @param image * @return */
public byte[] bufferedImageToByteArray(BufferedImage image) throws IOException{
    
    ByteArrayOutputStream os = new ByteArrayOutputStream();
    ImageIO.write(image, "png", os);
    return os.toByteArray();
}