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That sounds promising. I have been using the XML formats and it does a good job but would welcome a more complete implementation of the open XML standard. I particularly like the speed compared to HSSF.
A future article perhaps?
________________________________
From: Scott Klement <rpg400-l@xxxxxxxxxxxxxxxx>
To: RPG programming on the IBM i / System i <rpg400-l@xxxxxxxxxxxx>
Sent: Sunday, July 1, 2012 12:33 PM
Subject: Re: Using HSSF & getting error
Hi Mike,
You're absolutely right -- but I won't settle for that XML format that
they had in Office 2003.
I've been working on a service program that works very similarly to
HSSF, but doesn't call Java routines at all. Instead, builds an XLSX
file (the native Excel format in Excel 2007 and up) by building the
proper directory structure and the various XML files inside that
structure, then zipping the whole thing.
I have a ways to go -- but for the document I mentioned earlier (the one
that took 30 minutes with POI's XSSF) it only takes 30 seconds to build.
That's a 60-fold improvement in performance.
On 7/1/2012 12:40 AM, Mike Krebs wrote:
If the sheet is not too complicated - or maybe even if it is - you
can probably do the same thing and do it much faster using XML style
spreadsheet. Standard writes to IFS. Some sheets can get pretty large
(XML is wordy compared to the binary formats) but I haven't had any
problems a little zip action didn't help.
midrange.com
