Hi Paul,
You might find the following code fragments helpful:
import java.io.*;
import java.util.zip.ZipOutputStream;
import java.util.zip.ZipEntry;
File tmpfile = File.createTempFile("myarchive", ".zip");
FileOutputStream out = new FileOutputStream(tmpfile);
ZipOutputStream zout = new ZipOutputStream(out);
// writing a file from a byte stream
zout.putNextEntry(new ZipEntry("ooxml.xlsx"));
zout.write(<my_poi>.getBytes());
zout.closeEntry();
// writing a directory
File dir = new File("/my/path/to/a/directory);
pack(dir, dir.getPath(), null, zout);
zout.close();
out.close();
public static void pack(File file, String root, FileFilter
filter, ZipOutputStream out) throws IOException {
if(file.isDirectory()){
File[] f = filter == null ? file.listFiles() :
file.listFiles(filter);
for (int i = 0; i < f.length; i++) {
pack(f[i], root, filter, out);
}
} else {
String path = file.getPath().substring(root.length() + 1);
out.putNextEntry(new ZipEntry(path));
byte[] chunk = new byte[1024];
int len;
FileInputStream is = new FileInputStream(file);
while((len = is.read(chunk)) > 0) out.write(chunk, 0, len);
is.close();
out.closeEntry();
}
}
Regards,
Dave
On Jul 30, 2008, at 10:10 AM, Dobson, Paul L CTR USAF AFMC 416 SCMS/
OBN wrote:
Turns out, native Windows XP zip file support doesn't work either.
Where I am, I cannot install or use any "unauthorized" software. I'm
sure there are no 3rd party zip programs that are authorized. Next
thing I'll try is writing java code to zip, unzip files.
-----Original Message-----
From: Dobson, Paul L CTR USAF AFMC 416 SCMS/OBN
[mailto:[EMAIL PROTECTED]
Sent: Tuesday, July 29, 2008 2:57 PM
To: POI Users List
Subject: RE: Rezip archive
I suspect you are right. I am using WinZip 8.0 (really old
version). I
am looking into just using XP native zip support. Has anyone tried
that? Does it work?
Paul
-----Original Message-----
From: Nick Burch [mailto:[EMAIL PROTECTED]
Sent: Tuesday, July 29, 2008 2:50 PM
To: POI Users List
Subject: Re: Rezip archive
On Tue, 29 Jul 2008, Dobson, Paul L CTR USAF AFMC 416 SCMS/OBN wrote:
I am trying to do some comparison to find out what it is about POI
3.5
beta that is causing it to create invalid xlsx files. I am having a
difficult time because when I try to zip a file after unzipping it,
the
excel 2007 parser can no longer read it, even if I make no changes to
the files. Any idea what I am doing wrong?
Using a broken zip utility from the look of it.
I've just tried using unzip v5.52 / zip v2.31 on linux. Steps were:
* mkdir expanded
* cd expanded
* unzip ../Original.xlsx
* zip -r ../Repacked.xlsx .
* scp ../Repacked.xlsx to a nearby windows box
* open Repacked.xlsx in excel 2007 without issue
I'd try using a zip utility that does what you ask it to, without any
magic or wizardry - I suspect your gui one is doing something
unhelpful
and not telling you.
Nick
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