In Java, using createPicture() method from XSLFSlide, images can be added to the PPT. Now the computer doesn’t understand, what’s there in the picture, so internally, this method accepts the image in a byte array format —> (a series of non-understandable random numbers, letters, symbols, etc.) something like this, AGETRDYDC5545#$^NHVGCFFSFSFGSDF#@@?.0976*).
The syntax for an empty slideshow
XMLSlideShow ppt = new XMLSlideShow();
The syntax for creating slide
XSLFSlide slide = ppt.createSlide();
The next task is to read the image file, which we wish to insert, and then convert it into a byte array using IOUtils.toByteArray() —> IOUtils class.
Add image into the presentation, using addPicture():
- Byte array format of the picture which is to be added(written in the code as byte[] photo)
- A static variable, which represents the file format of the image.
Syntax:
int idx = ppt.addPicture(photo, XSLFPictureData.PICTURE_TYPE_PNG);
Insert the image to a slide, using createPicture().
XSLFPictureShape pic = slide.createPicture(idx);
Implementation:
Java
// Adding Images to a slide in a PPT using javaimport java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException; import org.apache.poi.util.IOUtils;import org.apache.poi.xslf.usermodel.XMLSlideShow;import org.apache.poi.xslf.usermodel.XSLFPictureData;import org.apache.poi.xslf.usermodel.XSLFPictureShape;import org.apache.poi.xslf.usermodel.XSLFSlide; public class InsertingImage { public static void main(String args[]) throws IOException { XMLSlideShow ppt = new XMLSlideShow(); XSLFSlide slide = ppt.createSlide(); File image byte[] photo = IOUtils.toByteArray( new FileInputStream(image)); int idx = ppt.addPicture( photo, XSLFPictureData.PICTURE_TYPE_PNG); XSLFPictureShape pic = slide.createPicture(idx); // we are creating a file object File file = new File("insertingimg.pptx"); FileOutputStream out = new FileOutputStream(file); // saving the changes to the file we created ppt.write(out); System.out.println("image is inserted"); out.close(); }} |
Commands for Compilation and Execution:
$javac InsertingImage.java $java InsertingImage
Output:
Reordering of the slides is done.
