Apache POI

Hej Eksperter

Jeg prøver at skrive en program som skal kunne konverterer en powerpoint slides om til en række .png billeder. Har fundet Apache POI projektet men har nogle vanskeligheder med at få deres eksempel til at fungere. Jeg har sat det op i Eclipse. Koden ser således ud. Det eneste jeg har ændret er de 5 første imports.

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.poi.xslf.usermodel.XMLSlideShow;
import org.apache.poi.xslf.usermodel.XSLFSlide;

public class PpttoPNG {
 
  public static void main(String args[]) throws IOException{
     
      //creating an empty presentation
      File file=new File("addingimage.pptx");
      XMLSlideShow ppt = new XMLSlideShow(new FileInputStream(file));
     
      //getting the dimensions and size of the slide
      Dimension pgsize = ppt.getPageSize();
      XSLFSlide[] slide = ppt.getSlides();
     
      for (int i = 0; i < slide.length; i++) {
        BufferedImage img = new BufferedImage(pgsize.width, pgsize.height,BufferedImage.TYPE_INT_RGB);
        Graphics2D graphics = img.createGraphics();

        //clear the drawing area
        graphics.setPaint(Color.white);
        graphics.fill(new Rectangle2D.Float(0, 0, pgsize.width, pgsize.height));

        //render
        slide[i].draw(graphics);
      }
     
      //creating an image file as output
      FileOutputStream out = new FileOutputStream("ppt_image.png");
      javax.imageio.ImageIO.write(img, "png", out);
      ppt.write(out);
     
      System.out.println("Image successfully created");
      out.close();   
  }
}


Jeg bruger

$ java -version
Picked up JAVA_TOOL_OPTIONS: -javaagent:/usr/share/java/jayatanaag.jar
java version "1.7.0_79"
OpenJDK Runtime Environment (IcedTea 2.5.6) (7u79-2.5.6-0ubuntu1.15.04.1)
OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode)