ignicolist

This is a method thar convert de first page of a pdf file into an image using the open source library of IcePdf from IceSoft:

import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import javax.imageio.ImageIO;
import javax.portlet.PortletPreferences;
import javax.servlet.ServletRequest;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.dispatcher.DefaultActionSupport;
import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.ServletResponseAware;
import org.apache.struts2.portlet.interceptor.PortletPreferencesAware;
import org.icepdf.core.exceptions.PDFException;
import org.icepdf.core.exceptions.PDFSecurityException;
import org.icepdf.core.pobjects.Document;
import org.icepdf.core.pobjects.PDimension;
import org.icepdf.core.pobjects.Page;
import org.icepdf.core.util.GraphicsRenderingHints;

private void generaImagenes(String urlDoc, String fileName) {
  boolean control = true;
  File file2 = new File(request.getSession().getServletContext()
    .getRealPath("/thumbnails"));

  String absoluteFile3 = file2.getAbsoluteFile().toString();
  File folder = new File(absoluteFile3);
  File[] listOfFiles = folder.listFiles();

  for (int i = 0; i < listOfFiles.length; i++) {
   if (listOfFiles[i].isFile()) {
    if (listOfFiles[i].getName().equals(fileName + ".png")) {
     control = false;

    }
   }
  }
  if (control == true) {
   Document document = new Document();

   try {
    URL files = new URL(urlDoc);

    document.setUrl(files);

   } catch (PDFException ex) {
    System.out.println("Error parsing PDF document " + ex);

   } catch (PDFSecurityException ex) {
    System.out.println("Error encryption not supported " + ex);

   } catch (FileNotFoundException ex) {
    System.out.println("Error file not found " + ex);

   } catch (IOException ex) {
    System.out.println("Error handling PDF document " + ex);

   }

   float userRotation = 0;
   float userZoom = 1;
   PDimension pdfDimension = document.getPageDimension(1,
     userRotation, userZoom);

   float height = pdfDimension.getHeight();

   float scale = (37000 / height) / 100;

   float rotation = 0f;

   // Paint each pages content to an image and write the image
   // to file

   BufferedImage image = (BufferedImage) document.getPageImage(0,
     GraphicsRenderingHints.SCREEN, Page.BOUNDARY_CROPBOX,
     rotation, scale);
   RenderedImage rendImage = image;
   // capture the page image to file
   try {

    File file = new File(request.getSession().getServletContext()
      .getRealPath("/thumbnails")
      + File.separatorChar + fileName + ".png");

    String absoluteFile2 = file.getAbsoluteFile().toString();
    absoluteFile2 = absoluteFile2.replaceAll("bin", "");

    file = new File(absoluteFile2);
    file = file.getAbsoluteFile();
    System.out.println("Generando: " + fileName + ".png");

    ImageIO.write(rendImage, "png", file);

   } catch (IOException e) {
    e.printStackTrace();
   }
   image.flush();

   // clean up resources
   document.dispose();
  }

 }

IceSoft