XMLSlideShow ppt = new XMLSlideShow();
        // Creating an empty presentation
        if (!powerpoints.isEmpty()) {

            for (String arg : powerpoints) {

                FileInputStream inputstream = new FileInputStream(arg);

                XMLSlideShow src = new XMLSlideShow(inputstream);

                ppt.setPageSize(src.getPageSize());

                for (XSLFSlide srcSlide : src.getSlides()) {

                    ppt.createSlide().importContent(srcSlide);

                }
                src.close();
                inputstream.close();
            }
            String mergedFile = intropath + "PowerPoints/result1.pptx";
            FileOutputStream out = new FileOutputStream(mergedFile);
            ppt.write(out);
            ppt.close();
            out.close();

I am attempting to merge powerpoints with this code. it merges all the powerpoints for the most part. Some spacing is off though and every time i open the result powerpoint it says it “needs to be repaired” Any way to fix both of these issues or alternate ways. I used to use Aspose Slides cloud but it has been giving me issues lately.

I am attempting to merge powerpoints with this code. it merges all the powerpoints for the most part. Some spacing is off though and every time i open the result powerpoint it says it “needs to be repaired” Any way to fix both of these issues or alternate ways. I used to use Aspose Slides cloud but it has been giving me issues lately.