Decompress ZIP file with Password

Hi all,
Does anybody know how to decompress a ZIP file with password protection?
I have a decompress code, but I don't know how to insert the pass.
Any solution?
Regards

I'm running out of suggestions over here.
Your exact command line yields this result:
zip warning: name not matched: in.txt
zip error: Nothing to do! (out.zip)
Well, it should, as I don't have an in.txt. Handing it an existing file, I get this:
zip -P pass out.zip result.txt
adding: result.txt (deflated 7%)
.. and opening in the Finder correctly prompts me:
so there must be something wrong with your system.
Very Long Shot: What version do you get when you type this? (I can't imagine this is the actual problem, but you never know.)
zip --version
Mine is
Copyright (c) 1990-2008 Info-ZIP - Type 'zip "-L"' for software license.
This is Zip 3.0 (July 5th 2008), by Info-ZIP.
Currently maintained by E. Gordon. Please send bug reports to
the authors using the web page at www.info-zip.org; see README for details.
Latest sources and executables are at ftp://ftp.info-zip.org/pub/infozip,
as of above date; see http://www.info-zip.org/ for other sites.
Compiled with gcc 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00) for Unix (Mac OS X) on May 25 2011.

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I'm running out of suggestions over here.
Your exact command line yields this result:
zip warning: name not matched: in.txt
zip error: Nothing to do! (out.zip)
Well, it should, as I don't have an in.txt. Handing it an existing file, I get this:
zip -P pass out.zip result.txt
adding: result.txt (deflated 7%)
.. and opening in the Finder correctly prompts me:
so there must be something wrong with your system.
Very Long Shot: What version do you get when you type this? (I can't imagine this is the actual problem, but you never know.)
zip --version
Mine is
Copyright (c) 1990-2008 Info-ZIP - Type 'zip "-L"' for software license.
This is Zip 3.0 (July 5th 2008), by Info-ZIP.
Currently maintained by E. Gordon. Please send bug reports to
the authors using the web page at www.info-zip.org; see README for details.
Latest sources and executables are at ftp://ftp.info-zip.org/pub/infozip,
as of above date; see http://www.info-zip.org/ for other sites.
Compiled with gcc 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00) for Unix (Mac OS X) on May 25 2011.

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Gin

http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4347142
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No I did not create a password and yes there is the .zip extension.
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Hi,
Here is an example:
private void button_Click(object sender, EventArgs e)
//Filename
string _filename = @"C:\test\testfile.txt";
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File input / output class:
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using (StreamWriter _streamWriter = new StreamWriter(filename, true))
_streamWriter.Write(new Crypto().Encrypt(data));
public static string ReadEncryptedfile(string filename)
using (StreamReader _streamReader = new StreamReader(filename))
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Encryption / decryption class:
class Crypto
byte[] _key { get; set; }
byte[] _iv { get; set; }
public Crypto()
_key = Encoding.Default.GetBytes("ABCDEFGHIJKLMNOP");
_iv = Encoding.Default.GetBytes("ABCDEFGHIJKLMNOP");
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var _byteData = Encoding.Default.GetBytes(data);
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return Convert.ToBase64String(_encryptedData, 0, _encryptedData.Length);
public string Decrypt(string data)
using (ICryptoTransform _iCrypto = new TripleDESCryptoServiceProvider().CreateDecryptor(_key, _iv))
var _byteData = Convert.FromBase64String(data);
var _decryptedData = _iCrypto.TransformFinalBlock(_byteData, 0, _byteData.Length);
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Remember to change the key and IV in the constructor of the Crypto class, key must be between 16-24 characters long.

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Hi.
I want to make a program to read a zip file with a password(aes encrytpion) and I foun the password.
At first i know the password and I want to do If I write it wright.
I read a zip file but when I try to read it with encryption I take that exception.
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*import java.io.*;
import java.lang.*;*
*import java.util.*;
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                                InputStream in = entry.getInputStream();
                                String inputLine = input.readLine();
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                                    +String line;+
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                                    +System.out.println(line);+
<                                    <em>input.close();+
<                       <em>// }+
+               if (entry.isProbablyCorrectPassword(pw)){+
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          } catch (Exception e){
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}And the exception is:
*{color:#0000ff}C:\Documents and Settings\Ergasia\Decryption\src\Decryption.java:26: getInputStream() in com.javamex.arcmexer.ArchiveEntry cannot be applied to (java.lang.String)*
*BufferedReader br = new BufferedReader(new InputStreamReader(entry.getInputStream(filename)));{color}*

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Hi all,
I write a class for zip and unzip the text files together which can be zip and unzip successfully with Java platform. However, I cannot extract the zip file with Winzip or even WinRAR after zipping with Java platform.
Please help to comment, thanks~
Below is the code:
=====================================================================
package myapp.util;
import java.io.* ;
import java.util.TreeMap ;
import java.util.zip.* ;
import myapp.exception.UserException ;
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public CompressionUtil() {
    super() ;
public void createZip(String zipName, String fileName)
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      throw fnfe ;
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      throw ioe ;
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      throw ue ;
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Tried~
The problem is still here~ >___<
Anyway, thanks for information sharing~
The message is:
Cannot open file: it does not appear to be a valid archive.
If you downloaded this file, try downloading the file again.
The problem may be here:
if (fos != null)
fos.close() ;
if (bos != null)
bos.close();
if (zos != null)
zos.close();
if (file != null)
file = null ;
The fos is closed before bos so the last buffer is not
saved.
zos.close() is enough.

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Decompress ZIP file with Password

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