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HTML2PDFTest - Java

The sample shows how to directly convert HTML pages to PDF using 'pdftron.PDF.HTML2PDF', which is part of separately licensable PDFNet Convert Add-On. HTML2PDF converter supports HTML conversion from a string or URL and offers many options to control page size and formating.

//---------------------------------------------------------------------------------------
// Copyright (c) 2001-2018 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();
	}
}