How to use Embedded Equations in Java Apache POI library?

Question

I am trying to use "Apache POI" to extract embedded equation and text from a .doc MS Word file into a .ppt MS Powerpoint file, I have successfully extracted text, but how do I extract embedded equations?

the Embedded Equations comes out like this if I only extract it as text:

!!EMBED Equation.3

score 3 · Accepted Answer · edited May 23 '17 at 12:15

3

This may not help you with the binary .doc format, but for the newer .docx format, I was able to get to the equation, which is embedded as an OLE document, using the following code:

 InputStream in = new FileInputStream(f);
 XWPFDocument doc = new XWPFDocument(in);
 for (PackagePart p : doc.getAllEmbedds()) {
   POIFSFileSystem poifs = new POIFSFileSystem(p.getInputStream());
   byte[] oleData = IOUtils.toByteArray(
              poifs.createDocumentInputStream("Equation Native"));
 }

And then you can extract the MathType data in there and hand it to a MTEF parser.

If you don't need the MathType data, there is also a placeholder image (in WMF format) that just renders the equation.

edited May 23 '17 at 12:15

Community

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answered Aug 10 '12 at 08:14

Thilo

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Thank you, though I don't need it anymore. – CarlLee Aug 10 '12 at 09:57
@Thilo Could you please take a look at this question also? http://stackoverflow.com/questions/35418453/how-can-i-add-embedded-equations-to-docx-files-by-using-apache-poi – MJBZA Feb 15 '16 at 20:31

How to use Embedded Equations in Java Apache POI library?

1 Answers1