Replace a File within a Zip

Demonstrates how to replace a file within a .zip

 Chilkat Java Library Downloads for Windows, Linux, and MAC OS X

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;
    }

    success = zip.OpenZip("a.zip");
    if (success != true) {
        System.out.println(zip.lastErrorText());
        return;
    }

    CkZipEntry entry;

    //  Locate the entry:
    entry = zip.FirstMatchingEntry("*HelloWorld123.txt");

    if (!(entry == null )) {

        zip.DeleteEntry(entry);

        boolean saveExtraPath;
        saveExtraPath = false;
        success = zip.AppendOneFileOrDir("c:/temp/HelloWorld123.txt",saveExtraPath);
        if (success != true) {
            System.out.println(zip.lastErrorText());
            return;
        }

        success = zip.WriteZipAndClose();
        if (success != true) {
            System.out.println(zip.lastErrorText());
            return;
        }

        System.out.println("Entry replaced and .zip re-written.");

    }
    else {
        System.out.println("Entry not found.");
    }

  }
}