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Java HTML to PDF Converter

Sample Java code for using PDFTron SDK to directly convert HTML pages to PDF by using 'pdftron.PDF.HTML2PDF'. The HTML2PDF converter supports conversion from a string or URL and offers many options to control page size and formatting. Learn more about our PDF Conversion Library.

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Step 2: Add the code:

//---------------------------------------------------------------------------------------
// Copyright (c) 2001-2019 by PDFTron Systems Inc. All Rights Reserved.
// Consult legal.txt regarding legal and license information.
//---------------------------------------------------------------------------------------

import com.pdftron.pdf.*;
import com.pdftron.sdf.*;

public class HTML2PDFTest {
    //---------------------------------------------------------------------------------------
    // The following sample illustrates how to convert HTML pages to PDF format using
    // the HTML2PDF class.
    //
    // 'pdftron.PDF.HTML2PDF' is an optional PDFNet Add-On utility class that can be
    // used to convert HTML web pages into PDF documents by using an external module (html2pdf).
    //
    // html2pdf modules can be downloaded from http://www.pdftron.com/pdfnet/downloads.html.
    //
    // Users can convert HTML pages to PDF using the following operations:
    // - Simple one line static method to convert a single web page to PDF.
    // - Convert HTML pages from URL or string, plus optional table of contents, in user defined order.
    // - Optionally configure settings for proxy, images, java script, and more for each HTML page.
    // - Optionally configure the PDF output, including page size, margins, orientation, and more.
    // - Optionally add table of contents, including setting the depth and appearance.
    //---------------------------------------------------------------------------------------

    public static void main(String[] args) {
        String output_path = "../../TestFiles/Output/html2pdf_example";
        String host = "http://www.gutenberg.org/";
        String page0 = "wiki/Main_Page";
        String page1 = "catalog/";
        String page2 = "browse/recent/last1";
        String page3 = "wiki/Gutenberg:The_Sheet_Music_Project";

        // The first step in every application using PDFNet is to initialize the
        // library and set the path to common PDF resources. The library is usually
        // initialized only once, but calling Initialize() multiple times is also fine.
        PDFNet.initialize();

        // For HTML2PDF we need to locate the html2pdf module. If placed with the
        // PDFNet library, or in the current working directory, it will be loaded
        // automatically. Otherwise, it must be set manually using HTML2PDF.SetModulePath.
        try {
            HTML2PDF.setModulePath("../../../Lib/");
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }

        //--------------------------------------------------------------------------------
        // Example 1) Simple conversion of a web page to a PDF doc.

        try {
            PDFDoc doc = new PDFDoc();

            // now convert a web page, sending generated PDF pages to doc
            if (HTML2PDF.convert(doc, host + page0))
                doc.save(output_path + "_01.pdf", SDFDoc.SaveMode.LINEARIZED, null);
            else
                System.out.println("Conversion failed.");

            doc.close();
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }

        //--------------------------------------------------------------------------------
        // Example 2) Modify the settings of the generated PDF pages and attach to an
        // existing PDF document.

        try {
            // open the existing PDF, and initialize the security handler
            PDFDoc doc = new PDFDoc("../../TestFiles/numbered.pdf");
            doc.initSecurityHandler();

            // create the HTML2PDF converter object and modify the output of the PDF pages
            HTML2PDF converter = new HTML2PDF();
            converter.setImageQuality(25);
            converter.setPaperSize(PrinterMode.e_11x17);

            // insert the web page to convert
            converter.insertFromURL(host + page0);

            // convert the web page, appending generated PDF pages to doc
            if (converter.convert(doc))
                doc.save(output_path + "_02.pdf", SDFDoc.SaveMode.LINEARIZED, null);
            else
                System.out.println("Conversion failed. HTTP Code: " + converter.getHTTPErrorCode() + "\n" + converter.getLog());

            doc.close();
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }

        //--------------------------------------------------------------------------------
        // Example 3) Convert multiple web pages, adding a table of contents, and setting
        // the first page as a cover page, not to be included with the table of contents outline.

        try {
            PDFDoc doc = new PDFDoc();

            HTML2PDF converter = new HTML2PDF();

            // Add a cover page, which is excluded from the outline, and ignore any errors
            HTML2PDF.WebPageSettings cover = new HTML2PDF.WebPageSettings();
            cover.setLoadErrorHandling(HTML2PDF.WebPageSettings.e_ignore);
            cover.setIncludeInOutline(false);
            converter.insertFromURL(host + page3, cover);

            // Add a table of contents settings (modifying the settings is optional)
            HTML2PDF.TOCSettings toc = new HTML2PDF.TOCSettings();
            toc.setDottedLines(false);
            converter.insertTOC(toc);

            // Now add the rest of the web pages, disabling external links and
            // skipping any web pages that fail to load.
            //
            // Note that the order of insertion matters, so these will appear
            // after the cover and table of contents, in the order below.
            HTML2PDF.WebPageSettings settings = new HTML2PDF.WebPageSettings();
            settings.setLoadErrorHandling(HTML2PDF.WebPageSettings.e_skip);
            settings.setExternalLinks(false);
            converter.insertFromURL(host + page0, settings);
            converter.insertFromURL(host + page1, settings);
            converter.insertFromURL(host + page2, settings);

            if (converter.convert(doc))
                doc.save(output_path + "_03.pdf", SDFDoc.SaveMode.LINEARIZED, null);
            else
                System.out.println("Conversion failed. HTTP Code: " + converter.getHTTPErrorCode() + "\n" + converter.getLog());

            doc.close();
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }

        //--------------------------------------------------------------------------------
        // Example 4) Convert HTML string to PDF.

        try {
            PDFDoc doc = new PDFDoc();

            HTML2PDF converter = new HTML2PDF();

            // Our HTML data
            String html = "<html><body><h1>Heading</h1><p>Paragraph.</p></body></html>";

            // Add html data
            converter.insertFromHtmlString(html);
            // Note, InsertFromHtmlString can be mixed with the other Insert methods.

            if (converter.convert(doc))
                doc.save(output_path + "_04.pdf", SDFDoc.SaveMode.LINEARIZED, null);
            else
                System.out.println("Conversion failed. HTTP Code: " + converter.getHTTPErrorCode() + "\n" + converter.getLog());

            doc.close();
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }

        PDFNet.terminate();
    }
}