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Saturday, 30 June 2018

Apache POI PPT - Merging

Apache POI PPT - Merging

You can merge multiple presentations using the importContent() method of the XMLSlideShow class. Given below is the complete program to merge two presentations −

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

public class MergingMultiplePresentations {
      public static void main(String args[]) throws IOException {
      //creating empty presentation
      XMLSlideShow ppt = new XMLSlideShow();
      //taking the two presentations that are to be merged 
      String file1 = "presentation1.pptx";
      String file2 = "presentation2.pptx";
      String[] inputs = {file1, file2};
      for(String arg : inputs){
         FileInputStream inputstream = new FileInputStream(arg);
         XMLSlideShow src = new XMLSlideShow(inputstream);
         for(XSLFSlide srcSlide : src.getSlides()) {
            //merging the contents
      String file3 = "combinedpresentation.pptx";
      //creating the file object
      FileOutputStream out = new FileOutputStream(file3);
      // saving the changes to a file
      System.out.println("Merging done successfully");
Save the above code as, and then compile and execute it from the command prompt as follows −
$java MergingMultiplePresentations
It will compile and execute to generate the following output −
Merging done successfully
The following snapshot shows the first presentation −
The following snapshot shows the second presentation −
Given below is the output of the program after merging the two slides. Here you can see the content of the earlier slides merged together.
Combined Presentation

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