Required jars:

  •   itext-1.1.4.jar
  •  itext-rups-2.1.3.jar
  •  jdtaus-editor-client-application-1.0-beta-10.jar
  •  PDFRenderer.jar
package com.liferay;

import com.sun.pdfview.PDFFile;
import com.sun.pdfview.PDFPage;

import java.awt.Graphics;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.HeadlessException;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.Transparency;
import java.io.*;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import javax.swing.*;
import javax.imageio.*;
import java.awt.image.*;

public class ImageMain {

	public static void setup() throws IOException {

	    //load a pdf from a byte buffer
	    File file = new File("E:/01_Installing-liferay-bundle.pdf");
	    RandomAccessFile raf = new RandomAccessFile(file, "r");
	    FileChannel channel = raf.getChannel();
	    ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
	    PDFFile pdffile = new PDFFile(buf);

	    int numPgs = pdffile.getNumPages();

	   for (int i=0; i<numPgs; i++)
	   {
	   // draw the first page to an image
	    PDFPage page = pdffile.getPage(i);

	    //get the width and height for the doc at the default zoom
	    Rectangle rect = new Rectangle(0,0,
	            (int)page.getBBox().getWidth(),
	            (int)page.getBBox().getHeight());

	    //generate the image
	    Image img = page.getImage(
	            rect.width, rect.height, //width & height
	            rect, // clip rect
	            null, // null for the ImageObserver
	            true, // fill background with white
	            true  // block until drawing is done
	            );

	    //save it as a file
	    BufferedImage bImg = toBufferedImage( img );
	    File yourImageFile = new File("E:/workspace/rnd/javarnd/page_" + i + ".png");
	    ImageIO.write( bImg,"png",yourImageFile);
	    }
	}

	// This method returns a buffered image with the contents of an image
	public static BufferedImage toBufferedImage(Image image) {
	    if (image instanceof BufferedImage) {
	        return (BufferedImage)image;
	    }

	    // This code ensures that all the pixels in the image are loaded
	    image = new ImageIcon(image).getImage();

	    // Create a buffered image with a format that's compatible with the screen
	    BufferedImage bimage = null;
	    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
	    try {
	        // Determine the type of transparency of the new buffered image
	        int transparency = Transparency.OPAQUE;

	        // Create the buffered image
	        GraphicsDevice gs = ge.getDefaultScreenDevice();
	        GraphicsConfiguration gc = gs.getDefaultConfiguration();
	        bimage = gc.createCompatibleImage(
	            image.getWidth(null), image.getHeight(null), transparency);
	    } catch (HeadlessException e) {
	        System.out.println("The system does not have a screen");
	    }

	    if (bimage == null) {
	        int type = BufferedImage.TYPE_INT_RGB;
	        bimage = new BufferedImage(image.getWidth(null), image.getHeight(null), type);
	    }

	    // Copy image to buffered image
	    Graphics g = bimage.createGraphics();

	    // Paint the image onto the buffered image
	    g.drawImage(image, 0, 0, null);
	    g.dispose();

	    return bimage;
	}

	public static void main(final String[] args) {
	    SwingUtilities.invokeLater(new Runnable() {
	        public void run() {
	            try {
	                ImageMain.setup();
	            } catch (IOException ex) {
	                ex.printStackTrace();
	            }
	        }
	    });
	}
	}

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Comments on: "PDF file to image(.png) conversion using java" (2)

  1. Image quality is not good especially in case if pdf is ebook. Is there any way out by which its quality could be improved?
    And try this pdf to convert into image by using your code
    http://automobiles.honda.com/images/2011/2011FullLineBrochure.pdf

    and pls tell me why this code is not working in this particular case though its pdf file.

  2. Grumpy Old Man said:

    After PDFbox didn’t show any text of my PDF documents, and I could not update to 2.0, this was my rescue. Thanks a lot, for my PDF documents (just B&W with some barcodes), this is exactly, what I needed.

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