Example implementation of Flying Saucer to render a PDF from HTML.

PDF.java

import com.lowagie.text.DocumentException;
import org.xhtmlrenderer.pdf.ITextRenderer;
import java.io.*;
import java.net.URL;

public class PDF {

    private void render() throws DocumentException, IOException {
        ITextRenderer iTextRenderer = new ITextRenderer();
        iTextRenderer.setDocument(getHtml());
        iTextRenderer.layout();
        iTextRenderer.createPDF(new FileOutputStream("example.pdf"));
    }

    private File getHtml() throws FileNotFoundException {
        final String fileName = "example.html";
        ClassLoader classLoader = this.getClass().getClassLoader();
        URL url = classLoader.getResource(fileName);
        if (url != null) {
            return new File(url.getFile());
        } else {
            throw new FileNotFoundException(fileName);
        }
    }

    public static void main(String... args) {
        try {
            new PDF().render();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}