Unzippping into specified directory

Question

hello!
i want to unzip my archive into a generated directory in the users home-directory.
ive tried this:
class UnZip
  public static final int EOF = -1;
  public UnZip(String [] args)
    if ( args.length != 1 )
      System.out.println( "Usage:java UnZip zipfile" );
    else
      try
        ZipFile zf = new ZipFile( args[0] );
        for ( Enumeration<? extends ZipEntry> e = zf.entries();              e.hasMoreElements(); )
          ZipEntry target = e.nextElement();
          System.out.print( target.getName() + " ." );
          saveEntry( zf, target );
          System.out.println( ". unpacked" );
      catch( FileNotFoundException e ) {
        System.out.println( "zipfile not found" );
      catch( ZipException e ) {
        System.out.println( "zip error..." );
      catch( IOException e ) {
        System.out.println( "IO error..." );
  void saveEntry( ZipFile zf, ZipEntry target )
                                throws ZipException,IOException
    File file = new File( target.getName() );
    if ( target.isDirectory() )
      file.mkdirs();
    else
      InputStream is = zf.getInputStream( target );
      BufferedInputStream bis = new BufferedInputStream( is );
      new File( file.getParent() ).mkdirs();
      String homedir = System.getProperty("user.home");
      File fd = new File(homedir + "/mp/");
      fd.mkdir();
      FileOutputStream fos = new FileOutputStream(homedir + "/mp/" + file );
      BufferedOutputStream bos = new BufferedOutputStream(fos);
      final int EOF = -1;
      for ( int c; ( c = bis.read() ) != EOF; )  // oder schneller
        bos.write( (byte)c );
      bos.close();
      fos.close();
}which ends up with a FileNotFoundException e,
while same code but with
      FileOutputStream fos = new FileOutputStream( file );
      BufferedOutputStream bos = new BufferedOutputStream(fos);
////*************************************************************/////////////////////it seems to work, its unpacking them files somewhere.
what do i dont see?

Answer 1

ive just copied all the unzip example ive found into the constructor for testing purposes, its not the way i code :-),i was just playing around with code snippets about unzipping.
the last mkdir is just to verify that this directory exist, the others i thought produce that directorysrtucture which is in the zipfile?
the code ive changed:
class UnZip
  public static final int EOF = -1;
  public UnZip(String [] args)
    if ( args.length != 1 )
      System.out.println( "Usage:java UnZip zipfile" );
    else
      try
        ZipFile zf = new ZipFile( args[0] );
        for ( Enumeration<? extends ZipEntry> e = zf.entries();              e.hasMoreElements(); )
          ZipEntry target = e.nextElement();
          System.out.print( target.getName() + " ." );
          saveEntry( zf, target );
          System.out.println( ". unpacked" );
      catch( FileNotFoundException e ) {
        System.out.println( "zipfile not found" );
      catch( ZipException e ) {
        System.out.println( "zip error..." );
      catch( IOException e ) {
        System.out.println( "IO error..." );
  void saveEntry( ZipFile zf, ZipEntry target )
                                throws ZipException,IOException
    File file = new File( target.getName() );
    if ( target.isDirectory() )
      file.mkdirs();
    else
      InputStream is = zf.getInputStream( target );
      BufferedInputStream bis = new BufferedInputStream( is );
      new File( file.getParent() ).mkdirs();
      String homedir = System.getProperty("user.home");
      File fd = new File(homedir,"mp");
      fd.mkdir();
      FileOutputStream fos = new FileOutputStream(new File(fd,file.getPath()));
      BufferedOutputStream bos = new BufferedOutputStream(fos);
      final int EOF = -1;
      for ( int c; ( c = bis.read() ) != EOF; )  // oder schneller
        bos.write( (byte)c );
      bos.close();
      fos.close();
}the output:
run-single:
derby/ .. unpacked
derby/derby.log .C:\Dokumente und Einstellungen\anti/mp/derby\derby.log
zipfile not found
java.io.FileNotFoundException: C:\Dokumente und Einstellungen\anti\mp\derby\derby.log (Das System kann den angegebenen Pfad nicht finden)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:179)
at java.io.FileOutputStream.<init>(FileOutputStream.java:131)
at mxnew.installClass$UnZip.saveEntry(installClass.java:86)
at mxnew.installClass$UnZip.<init>(installClass.java:48)
the error line is the one with the FileOutputStream fos = new FileOutputStream(new File(fd,file.getPath()));