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Create PowerPoint Slide
Using Java
In this example we are going to create a PowerPoint slide .
HWSL is used to make the Microsoft PowerPoint 97(-2003) file format
by pure Java. It supports read and write capabilities of some, but not yet all of the core records.
HSSF provides a way to read PowerPoint presentations, and extracts text from it. It also provides some
edit capabilities (currently limited).
The org.apache.poi.hslf.extractor.PowerPointExtractor class is used to extract
text from PowerPoint. It accepts a file or an input stream. The getText() method can be used to get the text from the slides, and the
getNotes() method is used to get the text from the notes. The getText(true,true)
is used to get the text from both.
To create a slide show we need org.apache.poi.hslf.usermodel.SlideShow.
To accepts a file or an input stream we need a org.apache.poi.hslf.HSLFSlideShow.
We
use getSlides() and getNotes() to get the slides and notes.
To get blocks of text we need getTextRuns().
The getTextAsString() and getTextAsVector() are two methods
which are used to get the text back. The getTextAsString() returns a single string with all the text in
it and getTextAsVector() returns a vector of strings, one for each text record found in the file.
We can change the text via TextRun.setText(String) or RichTextRun.setText(String).
But it is not yet possible to add additional TextRuns or RichTextRuns.
We can add new slides by calling SlideShow.createSlide(), which will add a new slide to the end of the
SlideShow. It is not possible to re-order slides, nor to add new text to slides
tile now .But currently we can add Escher objects.
The following classes can be used to create the PowerPoint presentations.
The org.apache.poi.hslf.HSLFSlideShow class handles reading in and writing out files.
The org.apache.poi.hslf.record.Record class is used to build a tree of all the records in the
file. This allows to access the record. The org.apache.poi.hslf.record.Record
class is base class of all records and also provides the main record generation code, which will build up a tree of records for a
file. The org.apache.poi.hslf.usermodel.SlideShow class is builds up model entries from the records, and presents a user facing view of the file.
The org.apache.poi.hslf.model.Slide class is used to define a user facing view of a Slide in a
SlideShow. The org.apache.poi.hslf.model.Slide class allows
us to get at the Text of the slide, and at any drawing objects on it. The org.apache.poi.hslf.model.TextRun
class is used to hold all the Text in a given area of the Slide, and will contain one or more
RichTextRuns. The
org.apache.poi.hslf.usermodel.RichTextRun class is used to hold a run of text, all having the same character and paragraph
styling. It is possible to modify text, and/or text styling. The org.apache.poi.hslf.extractor.PowerPointExtractor
is used to allow extraction of text from files. The org.apache.poi.hslf.extractor.QuickButCruddyTextExtractor
class is used to extract all the text from files very fast, but including deleted text
and other bits of Crud.
In this example we are creating a PowerPoint presentation. For this we are
creating the object of SlideShow
after that we are creating an object of slide and an object of file output
to create a .ppt file .
The code of the program is given below:
import org.apache.poi.hslf.HSLFSlideShow;
import org.apache.poi.hslf.model.Slide;
import org.apache.poi.hslf.usermodel.SlideShow;
import java.io.*;
public class createNewPersentation
{
public static void main(String str[])
{
try{
SlideShow slideShow = new SlideShow();
Slide slide = slideShow.createSlide();
FileOutputStream out = new FileOutputStream("slideshow.ppt");
slideShow.write(out);
out.close();
}catch(Exception e){}}
}
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The output of the program is given below:
Download this example.
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