Java

Unzip Some Files by Iterating over Entries

See more Zip Examples

Demonstrates how to unzip specific files by iterating over entries in a .zip. Java

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[])
  {
    boolean success = false;

    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkZip zip = new CkZip();

    // Open a .zip containing:
    // 
    // a1.xml
    // b1.xml
    // c1.xml
    // dir1/a2.xml
    // dir1/c2.xml
    // dir2/dir3/c3.xml

    // We wish to unzip only a1.xml, b1.xml, and c1.xml
    success = zip.OpenZip("qa_data/zips/xml_files.zip");
    if (success == false) {
        System.out.println(zip.lastErrorText());
        return;
        }

    CkStringBuilder sbFilename = new CkStringBuilder();

    CkZipEntry entry = new CkZipEntry();
    int numEntries = zip.get_NumEntries();
    int i = 0;
    while (i < numEntries) {
        zip.EntryAt(i,entry);

        String entryFilePath = entry.fileName();
        System.out.println(entryFilePath);

        if (entry.get_IsDirectory() == false) {
            sbFilename.SetString(entryFilePath);
            if (sbFilename.Contains("/",false) == false) {
                // Does not contain "/"
                // Unzip to the qa_output directory.
                success = entry.Extract("qa_output");
                if (success == false) {
                    System.out.println("Failed to unzip " + entryFilePath);
                    }
                else {
                    System.out.println("Unzipped " + entryFilePath);
                    }

                }

            }

        i = i+1;
        }
  }
}