(Java) Extract PDF from JSON

Demonstrates how to extract a PDF file contained within JSON. The file is represented as a base64 string within the JSON. Note: This example can extract any type of file, not just a PDF file.

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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[])
  {
    CkJsonObject json = new CkJsonObject();

    // Load the JSON.
    boolean success = json.LoadFile("qa_data/json/JSR5U.json");
    if (success != true) {
        System.out.println(json.lastErrorText());
        return;
        }

    // The JSON we loaded contains this:

    // 	{
    // 	...
    // 	...
    // 	  "data": {
    // 	    "content": "JVBERi0xLjQ..."
    // 	  }
    // 	...
    // 	...
    // 	}

    CkStringBuilder sb = new CkStringBuilder();
    json.StringOfSb("data.content",sb);

    CkBinData bd = new CkBinData();
    bd.AppendEncodedSb(sb,"base64");

    success = bd.WriteFile("qa_output/a0015.pdf");
  }
}