(Java) Read/Write JSON with Binary Data such as JPEG Files

Demonstrates how binary files could be stored in JSON in base64 format. Creates JSON containing the contents of a JPG file, and then reads the JSON to extract the JPEG image.

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import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    // First load a small JPG file..
    CkBinData bd = new CkBinData();

    boolean success = bd.LoadFile("qa_data/jpg/starfish20.jpg");
    // Assume success, but your code should check for success..

    // Create JSON containing the binary data in base64 format.
    CkJsonObject json1 = new CkJsonObject();
    json1.UpdateBd("starfish","base64",bd);

    String jsonStr = json1.emit();
    System.out.println(jsonStr);

    // Here's the output:
    // {"starfish":"/9j/4AAQSkZJRgA ... cN2iuLFsCEbDGxQkI6RO/n//2Q=="}

    // Let's create a new JSON object, load it with the above JSON, and extract the JPG image..
    CkJsonObject json2 = new CkJsonObject();
    json2.Load(jsonStr);

    // Get the binary bytes.
    CkBinData bd2 = new CkBinData();
    json2.BytesOf("starfish","base64",bd2);

    // Save to a file.
    success = bd2.WriteFile("qa_output/starfish20.jpg");

    System.out.println("Success.");
  }
}