Как шаблон Thymelaf (HTML с ним) конвертировать в PNG в JAVA?

import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.image.PNGTranscoder;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;
 
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
 
public class ThymeleafToPngConverter {
 
    public static byte[] convertToPng(String thymeleafTemplate, Context context) throws IOException {
        TemplateEngine templateEngine = new TemplateEngine();
        String processedTemplate = templateEngine.process(thymeleafTemplate, context);
 
        PNGTranscoder transcoder = new PNGTranscoder();
        TranscoderInput input = new TranscoderInput(new ByteArrayInputStream(processedTemplate.getBytes()));
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        TranscoderOutput output = new TranscoderOutput(outputStream);
 
        transcoder.transcode(input, output);
 
        return outputStream.toByteArray();
    }
 
    public static void main(String[] args) {
        String thymeleafTemplate = "<h1></h1>";
        Context context = new Context();
        context.setVariable("title", "Hello, World!");
 
        try {
            byte[] pngData = convertToPng(thymeleafTemplate, context);
            // Save pngData to a file or send it as a response
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}