For basic text extraction, make use of
org.apache.poi.extractor.PowerPointExtractor
. 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 can be used to get the text
from the notes. Finally, getText(true,true)
will get the text
from both.
To get specific bits of text, first create a org.apache.poi.usermodel.SlideShow
(from a org.apache.poi.HSLFSlideShow
, which accepts a file or an input
stream). Use getSlides()
and getNotes()
to get the slides and notes.
These can be queried to get their page ID (though they should be returned
in the right order). You can also call getTextRuns()
on these, to get their
blocks of text. From the TextRun
, you can extract the text, and check
what type of text it is (eg Body, Title)
If speed is the most important thing for you, you don't care
about getting duplicate blocks of text, you don't care about
getting text from master sheets, and you don't care about getting
old text, then
org.apache.poi.extractor.QuickButCruddyTextExtractor
might be of use.
QuickButCruddyTextExtractor doesn't use the normal record parsing code, instead it uses a tree structure blind search method to get all text holding records. You will get all the text, including lots of text you normally wouldn't ever want. However, you will get it back very very fast!
There are two ways of getting the text back.
getTextAsString()
will return a single string with all
the text in it. getTextAsVector()
will return a
vector of strings, one for each text record found in the file.
It is possible to change the text via
TextRun.setText(String)
. However, if the length of
the text is changed, things will break because PowerPoint has
internal file references in byte offsets. We currently update all
of these byte references that we know about when writing out, but
there are a few more still to be found.
org.apache.poi.hslf.HSLFSlideShow
Handles reading in and writing out files. Calls
org.apache.poi.hslf.record.record
to build a tree
of all the records in the file, which it allows access to.
org.apache.poi.hslf.record.record
Base class of all records. Also provides the main record generation
code, which will build up a tree of records for a file.
org.apache.poi.hslf.usermode.SlideShow
Builds up model entries from the records, and presents a user facing
view of the file
org.apache.poi.hslf.extractor.PowerPointExtractor
Uses the model code to allow extraction of text from files