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Convert .pptx file to .ppt using Java

I was wondering if anyone knows a way to convert .pptx to .ppt using Java progamously?

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3 answers

Use Apache POI .

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You can use openoffice for conversion. You must configure eclipse / netbeans correctly. You also need the jodconverter plugin. oh and don't forget to open OO in listening mode

package openofficeconv;
import java.io.File;
import java.net.ConnectException;

import com.artofsolving.jodconverter.DocumentConverter;
import com.artofsolving.jodconverter.openoffice.connection.*;
import com.artofsolving.jodconverter.openoffice.converter.OpenOfficeDocumentConverter;

public class PowerpointConverter{

public static void main(String[] args) {

    File inputFile = new File("j.pptx");
    File outputFile = new File("j.pdf");

    // connect to an OpenOffice.org instance running on port 8100
    OpenOfficeConnection connection = new SocketOpenOfficeConnection(8100);
    try {
        connection.connect();
    } catch (ConnectException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    // convert
    DocumentConverter converter = new OpenOfficeDocumentConverter(connection);
    converter.convert(inputFile, outputFile);

    // close the connection
    connection.disconnect();
}
}
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Aspose Slides - , , pptx. , , , . Apache POI ppt Java, , pptx.

Update: here is how I extracted images using Aspose. When you have png files, you can create PDF files using other tools. I need images with a clear size - you can just get it as your own size:

Dimension small = new Dimension(160, 120);
Dimension medium = new Dimension(200,150);
Dimension large = new Dimension(400,300);

for (Slide slide : presentation.getSlides()) {
  String path = FileService.getUploadPath() + slide.getPath();
  com.aspose.slides.Slide pptSlide = ppt.getSlideByPosition(slide.getSequence());
  ImageIO.write(pptSlide.getThumbnail(1, 1), "png", new File(path));

  path = FileService.getUploadPath() + slide.getSmallPath();
  ImageIO.write(pptSlide.getThumbnail(small), "png", new File(path));

  path = FileService.getUploadPath() + slide.getMediumPath();
  ImageIO.write(pptSlide.getThumbnail(medium), "png", new File(path));

  path = FileService.getUploadPath() + slide.getLargePath();
  ImageIO.write(pptSlide.getThumbnail(large), "png", new File(path));
}
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