Trouble opening file with Java to use with PDFBox

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Michael Boeckel
Michael Boeckel 2016-5-9
评论： Michael Boeckel 2016-5-10
I am trying to use the PDFBox library to read the contents of PDF files, but I can't seem to open any of the files in the correct format for PDFBox to use. I'm using the following code to open each document:
javaaddpath('...\pdfParseDemo\pdfbox-2.0.0.jar')
javaaddpath('...\FontBox-0.1.0\FontBox-0.1.0\lib\FontBox-0.1.0.jar')
pdfname = '...\example.pdf';
import java.io.*;
pdfdoc = org.apache.pdfbox.pdmodel.PDDocument; %Define a PDDocument object placeholder
pdfdoc.load(FileInputStream(pdfname)); %Load the PDF file
However, this seems to return an empty object. When I try to query any of the file's properties or contents, it always returns an empty or zero value. I suspect the problem is with how I'm opening the file, because I know PDFBox has been successfully used natively with Java in many cases. Unfortunately the documentation for interfacing with Matlab is very sparse, so I'm not sure what I should be doing differently. Is there some kind of weirdness with how Matlab handles Java file input calls?

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采纳的回答

Elias Gule
Elias Gule 2016-5-9
Try wrapping your pdfname variable in a java.lang.String variable. This sometimes works:
pdfname = java.lang.String('...\example.pdf');
  2 个评论
Michael Boeckel
Michael Boeckel 2016-5-9
Good suggestion, but no joy, sadly. I tried this with several different variations on the loading call, but none worked.
Michael Boeckel
Michael Boeckel 2016-5-10
Disregard! I tried your suggestion with the Java "File" constructor instead of the FileInputStream constructor, and with a bit of coaxing, that worked! Many thanks good sir!

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