Decode a Base64 String from JSONArray to Byte list in JAVA

Question

I have a JSONArray that contains image files in Base64 format.

I would like to decode the images in Byte list.

My json array format:

jsonarray:[{"manchine_image":{"image_file":"VW5pdHlGUw...}

My existing code:


 List<String> image = new ArrayList<String>();   
                    for(int i = 0; i < jsonarray.length();i++) {

                          JSONObject jsonobject = jsonarray.getJSONObject(i);
                          image.add(new String(jsonobject.toString().getBytes("image_file")));
}

I tried this but i have this error:

java.io.UnsupportedEncodingException: image_file

Thanks anyway.

Fabien · Accepted Answer · 2020-06-22 20:22:10Z

1

This is how you can decode a Base64 String to byte array :

import java.util.Base64;

class Scratch {
    public static void main(String[] args) {
        String imageFile = "VW5pdHlGUw...";
        byte[] decode = Base64.getDecoder().decode(imageFile);
    }
}

answered Jun 22, 2020 at 20:22

Fabien

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billan maratos · Accepted Answer · 2020-06-23 09:44:18Z

0

I found the answer. Thank you for your help.

image.add(new String(jsonobject.toString().getBytes("image_file"))); --> image.add(jsonobject.getJSONObject("machine_image").getString("image_file")); //correct

answered Jun 23, 2020 at 9:44

billan maratos

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