Append File and Rename within Zip

How to append an additional file to a .zip and rename it within the .zip.

Download Chilkat Java Library

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    CkZip zip = new CkZip();

    boolean success;

    //  Any string unlocks the component for the 1st 30-days.
    success = zip.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        System.out.println(zip.lastErrorText());
        return;
    }

    //  Open an existing .zip.
    //  Note: Opening a zip does not read the entire zip into memory.
    //  It simply opens the zip and makes it ready for unzipping
    //  or retrieving information and/or data.
    success = zip.OpenZip("a.zip");
    if (success != true) {
        System.out.println(zip.lastErrorText());
        return;
    }

    //  Save the current number of entries.
    int numEntries;
    numEntries = zip.get_NumEntries();

    //  Append a new file to the .zip.
    //  The new entry is at index numEntries (indexing begins at 0).
    //  Note: The AppendOneFileOrDir simply adds a reference to the
    //  file to the zip object.  The file is not actually read
    //  or physically added to the .zip file until the WriteZip or
    //  WriteZipAndClose method is called.
    success = zip.AppendOneFileOrDir("hamlet.xml");
    if (success != true) {
        System.out.println(zip.lastErrorText());
        return;
    }

    //  Get the entry we just added:
    CkZipEntry entry;
    entry = zip.GetEntryByIndex(numEntries);

    //  Change the filename.
    //  The zip component remembers the file referenced in the filesystem.
    //  When the zip is written, the "hamlet.xml" file is read and
    //  compressed, but the filename within the zip will be "shakespearePlay.xml".
    entry.put_FileName("shakespearePlay.xml");

    //  Write the .zip
    //  The Chilkat Zip component always writes to a temporary file
    //  first.  This is to ensure that (in cases like this), if something
    //  goes wrong we don't lose the original .zip.  If the write
    //  finishes without error, it is moved to the destination
    //  file, thus overwriting it.  The TempDir property controls
    //  the directory where the temp zip is written.
    success = zip.WriteZipAndClose();
    if (success != true) {
        System.out.println(zip.lastErrorText());
        return;
    }

  }
}