Unzip a zipped file?

How can I unzip a zipped file with java ?

I presume you've read the API of [url http://java.sun.com/j2se/1.4.1/docs/api/java/util/zip/ZipFile.html]ZipFile?

Similar Messages

Problem in unzipping the zip files

Hi,
I have created a program to unzip the zip files. But when i try to zip it is creating the zipped files outside the folder where it is to be zipped.
what is wrong with my code.
if the zip file is migration.zip
if the path inside the zip file shows
and the path inside says this
/codebase/scripts/
it would create migration folder and create codebase folder outside the migration folder
what is wrong with my code
//Unzip the zip files to the folder with their name
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
// Getting the path to find the type of files
public class zipper implements FilenameFilter{
 String ext;
 public zipper(String ext)
 this.ext="." + ext;
 public boolean accept(File dir,String name)
 return name.endsWith(ext);
public static void main(String args[]) throws IOException
 try
 String dir = "D:/a/";
 File f2 = new File(dir);
 FilenameFilter fn= new zipper("zip");
 String ss[]=f2.list(fn);
 for ( int j = 0; j < ss.length; j++)
 System.out.println(" Extracting ...." + ss[j]) ;
 String zipFile = dir + ss[j];
 ZipFile zf = new ZipFile(zipFile);
 Enumeration entries = zf.entries();
 String directoryName = zf.getName();
 directoryName = directoryName.substring(0, (directoryName.indexOf(":" + File.separator) + 2));
 String folderName = zf.getName();
 folderName = folderName.substring(0, folderName.lastIndexOf("."));
 File file1 = new File(folderName);
 //File file1 = new File(entries.getName());
 file1.mkdir();
 while (entries.hasMoreElements())
 ZipEntry ze = (ZipEntry) entries.nextElement();
 String path = directoryName + ze.getName() ;
 String path1 = folderName + ze.getName();
 //System.out.println(" : " + path);
 if (ze.getName().endsWith("/"))
 File file = new File(path);
 file.mkdir();
 continue;
 //break;
 BufferedReader bReader = new BufferedReader(new InputStreamReader(zf.getInputStream(ze)));
 StringBuffer fileBuffer = new StringBuffer(" ");
 String line ;
 while ((line = bReader.readLine()) != null)
 fileBuffer.append(line);
 fileBuffer.append("\r\n");
 //line = line + "\r\n";
 //byte[] b = new byte[line.length()];
 //b =line.getBytes();
 //out.write();
 String fileData = fileBuffer.toString();
 File f1 = new File(path);
 f1.createNewFile();
 //FileOutputStream out = new FileOutputStream(folderName + "/" + ze.getName());
 FileOutputStream out = new FileOutputStream(path);
 long size = ze.getSize();
 byte[] data1 = new byte[fileData.length()];
 for (int i = 0; i < fileData.length(); i++)
 data1[i] = (byte) fileData.charAt(i);
 out.write(data1);
 out.close();
 bReader.close();
 } catch (Exception e)
 e.printStackTrace();
Thanks in Advance
Avinash

String path = directoryName + ze.getName();
String path1 = folderName + File.separator+ ze.getName();
File f1 = new File(path); // pass path1 instead of path
f1.createNewFile();
FileOutputStream out = new FileOutputStream(path); // pass path1 instead of path

Problem in Unzipping the zip file

Hi
I have created a program to unzip the zip files in the folder named after the zip file
it is working well well when u try to zip zip files put in a directory
i.e u create a folder name contents and put files into that and then zip it
but when u directly create a zip file , without putting in a folder
it creates the folder and zip the files outside the folder
Another problem is that with the path
for e.g. suppose the zip file name is contents and path should show
contents/filename.txt but there are some other files whose path shows
res/file.txt. In this case it creates a folder of res and put it outside the
folder with the name of zip file
I have pasted my code :
//Unzip the zip files to the folder with their name
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
// Getting the path to find the type of files
public class zipper implements FilenameFilter{
 String ext;
 public zipper(String ext)
 this.ext="." + ext;
 public boolean accept(File dir,String name)
 return name.endsWith(ext);
public static void main(String args[]) throws IOException
 try
 String dir = "D:/";
 File f2 = new File(dir);
 FilenameFilter fn= new zipper("zip");
 String ss[]=f2.list(fn);
 for ( int j = 0; j < ss.length; j++)
 System.out.println(" Extracting ...." + ss[j]) ;
 String zipFile = dir + ss[j];
 ZipFile zf = new ZipFile(zipFile);
 Enumeration entries = zf.entries();
 String directoryName = zf.getName();
 directoryName = directoryName.substring(0, (directoryName.indexOf(":" + File.separator) + 2));
 String folderName = zf.getName();
 folderName = folderName.substring(0, folderName.lastIndexOf("."));
 File file1 = new File(folderName);
 //File file1 = new File(entries.getName());
 file1.mkdir();
 while (entries.hasMoreElements())
 ZipEntry ze = (ZipEntry) entries.nextElement();
 String path = directoryName + ze.getName() ;
 String path1 = folderName + ze.getName();
 //System.out.println(" : " + path);
 if (ze.getName().endsWith("/"))
 File file = new File(path);
 file.mkdir();
 continue;
 //break;
 BufferedReader bReader = new BufferedReader(new InputStreamReader(zf.getInputStream(ze)));
 StringBuffer fileBuffer = new StringBuffer(" ");
 String line ;
 while ((line = bReader.readLine()) != null)
 fileBuffer.append(line);
 fileBuffer.append("\r\n");
 //line = line + "\r\n";
 //byte[] b = new byte[line.length()];
 //b =line.getBytes();
 //out.write();
 String fileData = fileBuffer.toString();
 File f1 = new File(path);
 f1.createNewFile();
 //FileOutputStream out = new FileOutputStream(folderName + "/" + ze.getName());
 FileOutputStream out = new FileOutputStream(path);
 long size = ze.getSize();
 byte[] data1 = new byte[fileData.length()];
 for (int i = 0; i < fileData.length(); i++)
 data1[i] = (byte) fileData.charAt(i);
 out.write(data1);
 out.close();
 bReader.close();
 } catch (Exception e)
 e.printStackTrace();
Thanks in Advance
Avinash

String path = directoryName + ze.getName();
String path1 = folderName + File.separator+ ze.getName();
File f1 = new File(path); // pass path1 instead of path
f1.createNewFile();
FileOutputStream out = new FileOutputStream(path); // pass path1 instead of path

Unzip a zip file

Can someone help me for the following problem,
Iam downloading a zip file from the server to the client.i want to unzip and execute the .EXE file, which is inside the zip file through the java coding.can any one help me!
thanking you

I think you can do all of this using the Java runtime interface which allows you to execute command line commands via Java code (ie, launching an EXE).
See http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Runtime.html
I don't believe there is a component of the Java API that allows you to unzip a zip file. But you could still accomplish this using the winzip command line support. See http://www.winzip.com/wzcline.htm in combination with the Java runtime.

Unzip a .zip file programatically??

Hi all friends,
I want to unzip a .zip file programatically.For that if any one can give me some code then it will be very help full for me.
Thanks & Regards
Bikash

this thread has some code
http://forum.java.sun.com/thread.jsp?forum=31&thread=417611
asjf

Unzip the Zip file in ABAP

Hi
I want to get the zip file having multiple .dat / .csv files from another server to application server.I want to unzip it and store the individual file to the folder.
Could you please help me.
Thanks in advance.
Amit

Hi Amit,
Please check this thread.
Re: UNZIP file from ABAP
Hope this will help.
Regards,
Ferry Lianto
Message was edited by: Ferry Lianto

Want to partly unzip a zip file

I'm trying to upgrade a BIllion 7404 gateway. The relevant firmware is at the top of the list here:
http://au.billion.com/support/bipac7404vgpm.php
If my understanding is correct the zip file for the firmware upgrade contains a file within it, a .afw file, that will upgrade the firmware on the Billion. However, when I double click on the zip file, Stuffit unzips the whole lot and I end up with 29 separate files that make up the .afw file, whereas I need the .afw file intact.
If I put the zip file, call it Upgrade.zip, onto a disk called G5-Data (the name I have given the internal drive on my G5), and use the Terminal command unzip, can anyone tell me the exact command I would need to type in to get a hold of the unzipped .afw file that resides within the zip file?
Thanks in advance for an suggestions.

Hi Cole,
I don't really understand how I got the file, but I got it. The file that I wanted itself contains 29 files that you are not supposed to see. When it is unzipped on a PC, the unzip process stops at the first layer, and that file is recognizable by the gateway as a firmware upgrade file. But if you give the gateway the folder with the 29 files it doesn't know what it is.
Stuffit reaches into the second layer and unpacks the lot into a folder of 29 files. Must be something in the zip file that is incorrectly setup that allows Stuffit to do that.
Anyway, I tried the command I posted and up came one file. I found a program called BetterZip that also unzips the file correctly. Maybe there is something wrong with Stuffit 10 and I should give it the boot. Do you know anything about that?
Thanks again for your help,
Guy

Cannot use winzip to unzip the zip file zipped by java.util.zip

Hi all,
I use the followcode to create a zip file, and i downlaod it and try to use winzip to unzip this file but fail. The path is correct and i got the zip file. but it just cannot unzip.
pls help
thanks alot.
Kin
 int count = 0;
 count = ContentDocuments.size();
 for (int i = 0; i < bb; i++) {
 System.out.println(filenames[i] + "");
 // Create a buffer for reading the files
 byte[] buf = new byte[10*1024*1024];
 try {
 String outFilename = MyDir + "zipfile/" + getContentID2()+".zip";
 System.out.println("outFilename = " + outFilename);
 ZipOutputStream out = new ZipOutputStream(new FileOutputStream(outFilename));
 for (int i=0; i<filenames.length; i++) {
 FileInputStream in = new FileInputStream(filenames);
 out.putNextEntry(new ZipEntry(filenames[i]));
 int len;
 while ((len = in.read(buf)) != -1) {
 out.write(buf, 0, len);
 out.closeEntry();
 in.close();
 out.close();
 } catch (IOException e) {
 System.err.println("zipprocess " + e.getMessage());

I've written a replacement zip file creator class. Not much tested but it seems to work, however I've yet to try it with the version of WINZIP that rejected my previous attempts. Oh, and the stored dates are garbage.
* ZipOutputFile.java
* Created on 25 March 2004, 13:08
package zip;
import java.io.IOException;
import java.nio.ByteBuffer;
* Creates a ZIP archive in a file which WINZIP should be able to read.
* Unfortunately zip archives generated by the standard Java class
* {@link java.util.zip.ZipOutputStream}, while adhering to PKZIPs format specification,
* don't appear to be readable by some versions of WinZip and similar utilities. This is
* probably because they use
* a format specified for writing to a non-seakable stream, where the length and CRC of
* a file is writen to a special block following the data. Since the length of the binary
* date is unknown this makes an archive quite complicated to read, and it looks like
* WinZip hasn't bothered.
* All data is Deflated. Close completes the archive, flush terminates the current entry.
* @see java.util.zip.ZipOutputStream
* @author Malcolm McMahon
public class ZipOutputFile extends java.io.OutputStream {
 byte[] oneByte = new byte[1];
 java.io.RandomAccessFile archive;
 public final static short DEFLATE_METHOD = 8;
 public final static short VERSION_CODE = 20;
 public final static short MIN_VERSION = 10;
 public final static int ENTRY_HEADER_MAGIC = 0x04034b50;
 public final static int CATALOG_HEADER_MAGIC = 0x02014b50;
 public final static int CATALOG_END_MAGIC = 0x06054b50;
 private final static short DISC_NUMBER = 0;
 ByteBuffer entryHeader = ByteBuffer.wrap(new byte[30]);
 ByteBuffer entryLater = ByteBuffer.wrap(new byte[12]);
 java.util.zip.CRC32 crcAcc = new java.util.zip.CRC32();
 java.util.zip.Deflater def = new java.util.zip.Deflater(java.util.zip.Deflater.DEFLATED, true);
 int totalCompressed;
 long MSEPOCH;
 byte [] deflateBuf = new byte[2048];
 public static final long SECONDS_TO_DAYS = 60 * 60 * 24;
 * Entry stores info about each file stored
 private class Entry {
 long offset; // position of header in file
 byte[] name;
 long crc;
 int compressedSize;
 int uncompressedSize;
 java.util.Date date;
 * Contructor also writes initial header.
 * @param fileName Name under which data is stored.
 * @param date Date to label the file with
 * @TODO get the date stored properly
 public Entry(String fileName, java.util.Date date) throws IOException {
 name = fileName.getBytes();
 this.date = date == null ? new java.util.Date() : date;
 entryHeader.position(10);
 putDate(entryHeader);
 entryHeader.putShort(26, (short)name.length);
 offset = archive.getFilePointer();
 archive.write(entryHeader.array());
 archive.write(name);
 catalog.add(this);
 crcAcc.reset();
 totalCompressed = 0;
 def.reset();
 * Finish writing entry data. Save the lenghts & crc for catalog
 * and go back and fill them in in the entry header.
 public void close() throws IOException {
 def.finish();
 while(!def.finished())
 deflate();
 entryLater.position(0);
 crc = crcAcc.getValue();
 compressedSize = totalCompressed;
 uncompressedSize = def.getTotalIn();
 entryLater.putInt((int)crc);
 entryLater.putInt(compressedSize);
 entryLater.putInt(uncompressedSize);
 long eof = archive.getFilePointer();
 archive.seek(offset + 14);
 archive.write(entryLater.array());
 archive.seek(eof);
 * Write the catalog data relevant to this entry. Buffer is
 * preloaded with fixed data.
 * @param buf Buffer to organise fixed lenght part of header
 public void writeCatalog(ByteBuffer buf) throws IOException {
 buf.position(12);
 putDate(buf);
 buf.putInt((int)crc);
 buf.putInt(compressedSize);
 buf.putInt(uncompressedSize);
 buf.putShort((short)name.length);
 buf.putShort((short)0); // extra field length
 buf.putShort((short)0); // file comment length
 buf.putShort(DISC_NUMBER); // disk number
 buf.putShort((short)0); // internal attributes
 buf.putInt(0); // external file attributes
 buf.putInt((int)offset); // file position
 archive.write(buf.array());
 archive.write(name);
 * This writes the entries date in MSDOS format.
 * @param buf Where to write it
 * @TODO Get this generating sane dates
 public void putDate(ByteBuffer buf) {
 long msTime = (date.getTime() - MSEPOCH) / 1000;
 buf.putShort((short)(msTime % SECONDS_TO_DAYS));
 buf.putShort((short)(msTime / SECONDS_TO_DAYS));
 private Entry entryInProgress = null; // entry currently being written
 private java.util.ArrayList catalog = new java.util.ArrayList(12); // all entries
 * Start a new output file.
 * @param name The name to store as
 * @param date Date - null indicates current time
 public java.io.OutputStream openEntry(String name, java.util.Date date) throws IOException{
 if(entryInProgress != null)
 entryInProgress.close();
 entryInProgress = new Entry(name, date);
 return this;
 * Creates a new instance of ZipOutputFile
 * @param fd The file to write to
 public ZipOutputFile(java.io.File fd) throws IOException {
 this(new java.io.RandomAccessFile(fd, "rw"));
 * Create new instance of ZipOutputFile from RandomAccessFile
 * @param archive RandomAccessFile
 public ZipOutputFile(java.io.RandomAccessFile archive) {
 this.archive = archive;
 entryHeader.order(java.nio.ByteOrder.LITTLE_ENDIAN); // create fixed fields of header
 entryLater.order(java.nio.ByteOrder.LITTLE_ENDIAN);
 entryHeader.putInt(ENTRY_HEADER_MAGIC);
 entryHeader.putShort(MIN_VERSION);
 entryHeader.putShort((short)0); // general purpose flag
 entryHeader.putShort(DEFLATE_METHOD);
 java.util.Calendar cal = java.util.Calendar.getInstance();
 cal.clear();
 cal.set(java.util.Calendar.YEAR, 1950);
 cal.set(java.util.Calendar.DAY_OF_MONTH, 1);
// def.setStrategy(Deflater.HUFFMAN_ONLY);
 MSEPOCH = cal.getTimeInMillis();
 * Writes the master catalogue and postamble and closes the archive file.
 public void close() throws IOException{
 if(entryInProgress != null)
 entryInProgress.close();
 ByteBuffer catEntry = ByteBuffer.wrap(new byte[46]);
 catEntry.order(java.nio.ByteOrder.LITTLE_ENDIAN);
 catEntry.putInt(CATALOG_HEADER_MAGIC);
 catEntry.putShort(VERSION_CODE);
 catEntry.putShort(MIN_VERSION);
 catEntry.putShort((short)0);
 catEntry.putShort(DEFLATE_METHOD);
 long catStart = archive.getFilePointer();
 for(java.util.Iterator it = catalog.iterator(); it.hasNext();) {
 ((Entry)it.next()).writeCatalog(catEntry);
 catEntry.position(0);
 catEntry.putInt(CATALOG_END_MAGIC);
 catEntry.putShort(DISC_NUMBER);
 catEntry.putShort(DISC_NUMBER);
 catEntry.putShort((short)catalog.size());
 catEntry.putShort((short)catalog.size());
 catEntry.putInt((int)(archive.getFilePointer() - catStart));
 catEntry.putInt((int)catStart);
 catEntry.putShort((short)0);
 archive.write(catEntry.array(), 0, catEntry.position());
 archive.setLength(archive.getFilePointer()); // truncate if old file
 archive.close();
 def.end();
 * Closes entry in progress.
 public void flush() throws IOException{
 if(entryInProgress == null)
 throw new IllegalStateException("Must call openEntry before writing");
 entryInProgress.close();
 entryInProgress = null;
 * Standard write routine. Defined by {@link java.io.OutputStream}.
 * Can only be used once openEntry has defined the file.
 * @param b Bytes to write
 public void write(byte[] b) throws IOException{
 if(entryInProgress == null)
 throw new IllegalStateException("Must call openEntry before writing");
 crcAcc.update(b);
 def.setInput(b);
 while(!def.needsInput())
 deflate();
 * Standard write routine. Defined by {@link java.io.OutputStream}.
 * Can only be used once openEntry has defined the file.
 * @param b Bytes to write
 public void write(int b) throws IOException{
 oneByte[0] = (byte)b;
 crcAcc.update(b);
 write(oneByte, 0, 1);
 * Standard write routine. Defined by {@link java.io.OutputStream}.
 * Can only be used once openEntry has defined the file.
 * @param b Bytes to write
 * @param off Start offset
 * @param len Byte count
 public void write(byte[] b, int off, int len) throws IOException{
 if(entryInProgress == null)
 throw new IllegalStateException("Must call openEntry before writing");
 crcAcc.update(b, off, len);
 def.setInput(b, off, len);
 while(!def.needsInput())
 deflate();
 * Gets a buffer full of coded data from the deflater and writes it to archive.
 private void deflate() throws IOException {
 int len = def.deflate(deflateBuf);
 totalCompressed += len;
 if(len > 0)
 archive.write(deflateBuf, 0, len);

Cannot unzip 10g zip file

Hi,
I tried to download the 10g zip file for windows but when I try to unzip it I get the message that the zipfile is not a valid archive. I then tried to download the separate components, but with the same result.
I'm using winzip 8.1
Cheers,
Magnus

Hi,
It seems like if the partition where the TEMP folder is located isn't big enough, the download fails. The downloaded file becomes the size of available space for TEMP.
The strange thing is that the download says 576 Mb (or something), and there is no error, but the file becomes only 270 Mb (in my case).
After allocating more room for TEMP the download worked fine.
Cheers,
Magnus

How to unzip and zip files

I have a very large number of Karaoke music that plays on my windows pc but some will not play on my Mac. I think i need to unzip & re-zip them to play on my mac but i'm not sure exactly how to do this. any suggestions? Do I need a special program? running os x 10.9.3

Zip files can be opened with the built in 'Archive Utility' application. Double click any zip file & it will try to unzip it.
This application is tucked away inside /System/Library/CoreServices/Archive Utility. If you want to set preferences for it you need to open the location in Finder by using the 'Go Menu > Go to Folder…', enter /System/Library/CoreServices/ for the path & then open the Archive Utility application and look in it's preferences.
I expect that zipping & rezipping will not do anything useful for you. I suspect that the file format is the issue.
Unzip some files & post what the Finders 'File > Get info' panel shows, take a screenshot of it with 'cmd+shift+4', then drag the crosshairs to select the area. it will appear on the Desktop for uploading here.
You may need to find a compatible player or find a way to convert them if the Mac cannot play them.
P.S. to zip a file(s) select the items & right click, select 'Compress x items' & you will get a zip archive - I don't think it will help you though

How do you stop automatic unzipping of .zip files

When downloading a flashable .zip file Yosemite automatically unzips it. How do you prevent this?

We've been experimenting with this today.
You can avoid getting the file by turning off the autodownload in the IM settings. The sender sees the file transfer, but it's not going to your machine. To get the file, you then need to click on it. It IS still going to Skype's servers though waiting to be retrieved and that is a worry.
A link is generated to retrieve the file. The link is sharable with anyone who is a skype subscriber.
Are these files ever deleted?
This makes me worry about the security all files sent via skype since it is the way-station and holder of these files. For instance, is it possible for a computer to check the randomly assigned numbers until they find all sorts of things?
We are using the 7 series versions.

Unzip (a zip file that has pdf files and a csv)

Here is my requirement:
Receive a zip file (that contains PDF files and a CSV file) in BizTalk
Each record in CSV has a field which identifies the PDF files (by pdf file name) associated with it
    For Example - record id on each row in CSV file identifies the pdf files associated with it,
                         pdf files have names starting with recordid_sequence number.pdf i.e. 11111_1.pdf, 11111_2.pdf,
                         11111_3.pdf...
Create two new zip files based on record id on the record in CSV file
    For example - one zip file with a new CSV and related pdf files for record id range 1 to 5000
                         another zip file with a new CSV and related pdf filesfor all other record ids
using BTS2010!!
"custom flat file disassembler component" or "use .Net helper class/service" or anything else? custom component should be fine to unzip and extract pdf files and read CSV? can go with another custom component on send to perform split
and zip the files.
Any recommendations?

Hi,
You can built custom pipeline component for unzipping, I have wrote an article for it: http://social.technet.microsoft.com/wiki/contents/articles/20640.biztalk-server-2010-processing-zip-message-having-multiple-type-files.aspx
Also sample is available : http://code.msdn.microsoft.com/windowsdesktop/BizTalk-Server-2010-42a1ae49/view/SourceCode
I hope it helps !!
Maheshkumar S Tiwari|User Page|Blog|BizTalk
Server : How Map Works on Port Level

Why won't my mac won't unzip downloaded zip files anymore?

ive been using my mac to unzip zip arhcive files ive downloaded from the internet and for the past few months ive had to troubles at all. but more recently my mac wouldnt actuallty zip the files. so i started using a free application in the app store called stuffit expander. but now even stuffit expander wont unzip my files. what is happening? the stuffit expander just says it is unable to recognize the file type which makes no sense, and when i use the default unzip application already on my mac it just turns the zip file into a file with the extension .cpgz

Solved
All you need to do is go to: ~/Library/Preferences/ (⇧⌘G)
find and delete this plist: com.apple.archiveutility.plist
Restart your mac.
Try any zip, Enjoy!
P.S. Dont worry, system will generate new working plist as well

Error Message when unzipping a .zip file

Hi,
After clicking on a .zip file, the dialog box opens and shows the progress of the unarchiving. I then receive an error message in a separate dialog box:
Unable to unarchive xxxxx.zip into "Image". (Error 1 - Operation Not Permitted.)
Any ideas what this error message is?

Hi dnonnema;
Here is a posting that might help you.
http://ask.metafilter.com/46261/My-Mac-will-not-open-zip-files-with-Stuffit-expa nder-What-does-Error-message-1-mean
Allan

How to unzip a zip file within another zip file

I've got code that successfully processes a file within a zip file.
But now the zip file can also contain other zip files. How can I
process a zip nested within a zip without actually extracting the
files? It looks like I need a ZipFile object to be able to take
advantage of the zip classes for reading zip entries. But the
ZipFile methods want as an argument an actual file, as opposed
to some object in memory. I can read the 'inner' zip file into a
ZipInputStream object, but then how do I make that available for
processing as a ZipFile? I've searched all over and cannot find
anything anywhere that talks about working with nested zip files.
Does anyone have any sample code that does this? Thanks!

I have successfully done it.
You cannot have the code - it is proprietary.
However here are a few pointers:
o Use ZipStreams rather than ZipFile.
o ZipStream is just a filter on a stream, so you can have a zipstream open, read a ZipEntry, then ask for a substream for the stuff up to the next ZipEntry. Put a second ZipStream on that substream.
o As I recall you have to watch out that your inner ZipStream does not do a close. (Everything will get closed.) Instead, there is another ZipStream method that will close without closing all the underlying streams.
Hope this helps.

Unzip a zipped file?

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