HTML to PDF converter for Java and .NET

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PD4ML: Getting Started

 

Below is a very basic PD4ML usage sample. It converts given URL into a local PDF file.


package samples;

import java.awt.Insets;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.security.InvalidParameterException;

import org.zefer.pd4ml.PD4Constants;
import org.zefer.pd4ml.PD4ML;

public class GettingStarted1 {
	protected int topValue = 10;
	protected int leftValue = 20;
	protected int rightValue = 10;
	protected int bottomValue = 10;
	protected int userSpaceWidth = 1300;

	public static void main(String[] args) {
		try {
			GettingStarted1 jt = new GettingStarted1();
			jt.doConversion("http://pd4ml.com/sample.htm", "c:/pd4ml.pdf");
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public void doConversion( String url, String outputPath ) 
				throws InvalidParameterException, MalformedURLException, IOException {
		File output = new File(outputPath);
		java.io.FileOutputStream fos = new java.io.FileOutputStream(output);

		PD4ML pd4ml = new PD4ML();
			
		pd4ml.setHtmlWidth(userSpaceWidth); // set frame width of "virtual web browser" 
			
		// choose target paper format and "rotate" it to landscape orientation
		pd4ml.setPageSize(pd4ml.changePageOrientation(PD4Constants.A4)); 
			
		// define PDF page margins
		pd4ml.setPageInsetsMM(new Insets(topValue, leftValue, bottomValue, rightValue)); 

		// source HTML document also may have margins, could be suppressed this way 
		// (PD4ML *Pro* feature):
		pd4ml.addStyle("BODY {margin: 0}", true);
			
		// If built-in basic PDF fonts are not sufficient or 
		// if you need to output non-Latin texts,
		// TTF embedding feature should help (PD4ML *Pro*)
		pd4ml.useTTF("c:/windows/fonts", true);

		pd4ml.render(new URL(url), fos); // actual document conversion from URL to file
		fos.close();
			
		System.out.println( outputPath + "\ndone." );
	}
}
The following Java class slightly changes the above example. Now it pre-reads source HTML to a string and passes it to render() method wrapped to StringReader. First it writes PDF bytes to ByteArrayOutputStream, which makes possible to measure size of the resulting document.

A disadvantage of the method is a bigger RAM utilization.

package samples;

import java.awt.Insets;;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.StringReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.security.InvalidParameterException;

import org.zefer.pd4ml.PD4Constants;
import org.zefer.pd4ml.PD4ML;

public class GettingStarted2 {
	protected int topValue = 10;
	protected int leftValue = 20;
	protected int rightValue = 10;
	protected int bottomValue = 10;
	protected int userSpaceWidth = 1300;

	public static void main(String[] args) {
		try {
			GettingStarted2 jt = new GettingStarted2();
			String html = readFile("c:/sample.htm", "UTF-8");
			jt.doConversion2(html, "c:/pd4ml.pdf");
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public void doConversion2( String htmlDocument, String outputPath ) 
				throws InvalidParameterException, MalformedURLException, IOException {

		PD4ML pd4ml = new PD4ML();
			
		pd4ml.setHtmlWidth(userSpaceWidth); // set frame width of "virtual web browser" 
			
		// choose target paper format
		pd4ml.setPageSize(pd4ml.changePageOrientation(PD4Constants.A4)); 
			
		// define PDF page margins
		pd4ml.setPageInsetsMM(new Insets(topValue, leftValue, bottomValue, rightValue)); 

		// source HTML document also may have margins, could be suppressed this way 
		// (PD4ML *Pro* feature):
		pd4ml.addStyle("BODY {margin: 0}", true);
			
		// If built-in basic PDF fonts are not sufficient or 
		// if you need to output non-Latin texts, TTF embedding feature should help 
		// (PD4ML *Pro*)
		pd4ml.useTTF("c:/windows/fonts", true);

		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		// actual document conversion from HTML string to byte array
		pd4ml.render(new StringReader(htmlDocument), baos); 
		// if the HTML has relative references to images etc, 
		// use render() method with baseDirectory parameter instead
		baos.close();
		
		System.out.println( "resulting PDF size: " + baos.size() + " bytes" );
		// in Web scenarios it is a good idea to send the size with 
		// "Content-length" HTTP header

		File output = new File(outputPath);
		java.io.FileOutputStream fos = new java.io.FileOutputStream(output);
		fos.write( baos.toByteArray() );
		fos.close();
		
		System.out.println( outputPath + "\ndone." );
	}
	
	private final static String readFile( String path, String encoding ) throws IOException {

		File f = new File( path );
		FileInputStream is = new FileInputStream(f);
		BufferedInputStream bis = new BufferedInputStream(is);
		
		ByteArrayOutputStream fos = new ByteArrayOutputStream();
		byte buffer[] = new byte[2048];

		int read;
		do {
			read = is.read(buffer, 0, buffer.length);
			if (read > 0) { 
				fos.write(buffer, 0, read); 
			}
		} while (read > -1);

		fos.close();
		bis.close();
		is.close();

		return fos.toString(encoding);
	}
}
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