Convert PDF to thumbnail image in Java [closed]

Question

Can anybody suggest me a free Java library that can convert a PDF and create a thumbnail image (PNG) from the first page.

Thanks.

Answer 1

You could try pdf-renderer it is a pure java solution. The following Code creates an image of the first page.

File pdfFile = new File("/path/to/pdf.pdf"); RandomAccessFile raf = new RandomAccessFile(pdfFile, "r"); FileChannel channel = raf.getChannel(); ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size()); PDFFile pdf = new PDFFile(buf); PDFPage page = pdf.getPage(0);  // create the image Rectangle rect = new Rectangle(0, 0, (int) page.getBBox().getWidth(),                                  (int) page.getBBox().getHeight()); BufferedImage bufferedImage = new BufferedImage(rect.width, rect.height,                                   BufferedImage.TYPE_INT_RGB);  Image image = 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 ); Graphics2D bufImageGraphics = bufferedImage.createGraphics(); bufImageGraphics.drawImage(image, 0, 0, null); ImageIO.write(bufferedImage, format, new File( "/path/to/image.jpg" )); 

Answer 2

Excellent sdorra, thanks for your input. I have re-work your example in order to convert all the pages from the pdf.

Hope that will help some of you guys.

import java.awt.Graphics2D; import java.awt.Image; import java.awt.Rectangle; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.io.RandomAccessFile; import java.nio.ByteBuffer; import java.nio.channels.FileChannel;  import javax.imageio.ImageIO;  import com.sun.pdfview.PDFFile; import com.sun.pdfview.PDFPage;  public class Main {      public static void main(String[] args) throws IOException {         File pdfFile = new File("c:\\YOURPDF.pdf");         RandomAccessFile raf = new RandomAccessFile(pdfFile, "r");         FileChannel channel = raf.getChannel();         ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());         PDFFile pdf = new PDFFile(buf);          for (int i=0; i<pdf.getNumPages(); i++) {             createImage(pdf.getPage(i), "c:\\PICTURE_" + i + ".jpg");         }     }      public static void createImage(PDFPage page, String destination) throws IOException{         Rectangle rect = new Rectangle(0, 0, (int) page.getBBox().getWidth(),                 (int) page.getBBox().getHeight());         BufferedImage bufferedImage = new BufferedImage(rect.width, rect.height,                          BufferedImage.TYPE_INT_RGB);          Image image = 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         );         Graphics2D bufImageGraphics = bufferedImage.createGraphics();         bufImageGraphics.drawImage(image, 0, 0, null);         ImageIO.write(bufferedImage, "JPG", new File( destination ));     }  } 

You can download the library from pdf-renderer-1.0.5.jar

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