Zippen/Datenkompression in Java: Codeschnipsel

Habe hier bei Galileo OpenBook etwas gefunden was ich fürs entzippen in Java gut gebrauchen kann. Baut auf den in Java integrierten Zip-Bibliotheken auf.

Galileo Computing :: Java ist auch eine Insel (8. Auflage) – 14.10 Datenkompression - Annotated

• 
  
  
  • package com.tutego.insel.io.zip;
    
    
    
    
    import java.util.zip.*;
    import java.io.*;
    import java.util.*;
    
    public class unzip
    {
      private static final byte[] buffer = new byte[ 0xFFFF ];
    
      public static void main( String[] args )
      {
        if ( args.length != 2 )
          System.out.println( "Benutzung: unzip " );
        else
        {
          try
          {
            ZipFile zipFile = new ZipFile( args[0] );
            Enumeration extends ZipEntry> zipEntryEnum = zipFile.entries();
    
            while ( zipEntryEnum.hasMoreElements() )
            {
              ZipEntry zipEntry = zipEntryEnum.nextElement();
              System.out.print( zipEntry.getName() + "." );
              extractEntry( zipFile, zipEntry, args[1] );
              System.out.println( ".. unpacked" );
            }
          }
          catch ( FileNotFoundException e )
          {
            System.err.println( "Fehler: ZipFile nicht gefunden!" );
          }
          catch ( IOException e )
          {
            System.err.println( "Fehler: Allgemeiner Ein-/Ausgabefehler!" );
          }
        }
      }
    
      private static void extractEntry( ZipFile zf, ZipEntry entry, String destDir )
        throws IOException
      {
        File file = new File( destDir, entry.getName() );
    
        if ( entry.isDirectory() )
          file.mkdirs();
        else
        {
          new File( file.getParent() ).mkdirs();
    
          InputStream  is = null;
          OutputStream os = null;
    
          try
          {
            is = zf.getInputStream( entry );
            os = new FileOutputStream( file );
    
            for ( int len; (len = is.read(buffer)) != –1; )
              os.write( buffer, 0, len );
          }
          finally
          {
            if ( os != null ) os.close();
            if ( is != null ) is.close();
          }
        }
      }
    }
    
    
    
    
  
  
  
  

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