How to set PDF page size A4 when we use ITextRende

Question

How to set PDF page size A4 when we use ITextRenderer to generate PDF from thymeleaf HTML template ?

I have generated PDF but page size is not proper, how to set page size A4 ITextRenderer library in JAVA

    ClassLoaderTemplateResolver templateResolver = new 
    ClassLoaderTemplateResolver();
    templateResolver.setSuffix(".html");
    templateResolver.setTemplateMode("HTML5");

    TemplateEngine templateEngine = new TemplateEngine();
    templateEngine.setTemplateResolver(templateResolver);

    Context context = new Context();
    context.setVariable("name", "Thomas");

    String html = templateEngine.process("templates/Quote", context);

    OutputStream outputStream = new FileOutputStream("message.pdf");
    ITextRenderer renderer = new ITextRenderer();
    renderer.setDocumentFromString(html);
    renderer.layout();
    renderer.createPDF(outputStream,true);
    outputStream.close();

Answer 1

Please be aware that you are using FlyingSaucer, not iText. FlyingSaucer is a product that internally uses (a very old version of) iText.

You are immediately cutting yourself off from 10+ years of bugfixes and developments.

If you are comfortable going for just iText, the best way of solving this issue is with pdfHTML.

It's an add-on we wrote to the iText7 core library that is specifically designed to convert HTML into PDF.

Simple example:

    File src = new File("source_html_file.html");
    File dest = new File("target_pdf_file.pdf");

    PdfDocument pdf = new PdfDocument(new PdfWriter(dest));
    Document doc = new Document(pdf, PageSize.A4);
    InputStream stream = new FileInputStream(src);

    ConverterProperties converterProperties = new ConverterProperties();
    FontProvider dfp = new DefaultFontProvider(true, true, true);
    converterProperties.setFontProvider(dfp);

    HtmlConverter.convertToPdf(stream, pdf, converterProperties);

Check out the tutorials online for more information https://developers.itextpdf.com/content/itext-7-examples/itext-7-converting-html-pdf