Taking a bytearray and creating and writing a JPEG

Question

I have a program that

Accepts an encoded base64 string
Converts it to a byte array.

It does this fine.

The final step involves writing this byte array to a file. For example C:\example.jpg. I know simply writing the bytes won't work so was not sure what I would need to do to take the byte array and create a jpg with the picture that is coming in.

I have to actually send the picture as an attachment in email, but for testing purposes wanted to see if I can see a file saved and when I open up the jpg opens up. Thanks.

What format are the bytes in? If they're already in jpeg format, then you should be able to write the byte array to a file with the correct name. — Merlyn Morgan-Graham, Aug 12 '11 at 02:48
Why do you think that writing those bytes to file won't work? — BalusC, Aug 12 '11 at 02:50

score 1 · Answer 1 · edited May 23 '17 at 11:58

1

I'm guessing you're in need of something like this?

BufferedImage image = ImageIO.read( new ByteArrayInputStream( byteArray ) );
ImageIO.write(image, "BMP", new File("filename.bmp"));

Check out this question and answer, that's where I acquired it from: How to create a BMP file from raw byte[] in Java

edited May 23 '17 at 11:58

Community

1
1

answered Aug 12 '11 at 02:49

DeusExMachina25

597
6
12

BufferedImage img = ImageIO.read(new ByteArrayInputStream(image)); File outputfile = new File("saved.jpg"); ImageIO.write(img, "jpg", outputfile); I had the following but file is empty. – Bill Lee Aug 12 '11 at 03:15

Taking a bytearray and creating and writing a JPEG

1 Answers1