I'm trying to use a Java library called jpedal (http://www.jpedal.org) in order
to convert PDF files to images. The following works great from the commandline
on my Mac:
java -cp ./jpedal_trial.jar org/jpedal/examples/images/HiResThumbnailExtractor
"test.pdf" "jpg"
However I'm not sure how to invoke the same from CF. I added the jpedal trial
jar to ColdFusion9/lib and then tried the following:
<cfset jpedal =
createObject("java","org/jpedal/examples/images/HiResThumbnailExtractor") />
and got the error:
An exception occurred while instantiating a Java object. The class must not be
an interface or an abstract class. Error: IllegalName:
org/jpedal/examples/images/HiResThumbnailExtractor.
I've spoken to the developer of jpedal, Mark Stephens, who told me that
HiResThumbnailExtractor is not an interface or abstract class.
As some of you may know, jpedal is already part of CF as Adobe have licensed
the library for some of their PDF handling. I wondered if this was causing
problems, but even after removing the original jpedal.jar from CF I got the
same error.
I was using CFPDF up until now to do the conversion but find the resulting
images not good enough in terms of quality. For example even after specifying
scale="100" in cfpdf, the resulting images are smaller than the original PDF.
Any tips on how I can use the .jar file successfully would be much appreciated.
Regards,
Stefan
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