Java

Iterate Through Matching ZIP Entries Using EntryMatching and ZipEntry.GetNextMatch

See more Zip Examples

This example demonstrates how to iterate through ZIP entries matching a wildcard pattern using:

• Zip.EntryMatching to obtain the first matching entry
• ZipEntry.GetNextMatch to advance to subsequent matching entries

The wildcard character * matches zero or more characters. Matching is performed against the full stored ZIP entry path.

The example searches for all entries beneath the docs/ directory.

Suppose the ZIP archive contains:

docs/
docs/readme.txt
docs/manual.pdf
docs/sub1/notes.txt
images/logo.png
hello.txt

The wildcard pattern:

docs/*

Matches:

docs/
docs/readme.txt
docs/manual.pdf
docs/sub1/notes.txt

Note that ZIP archives may optionally contain separate directory entries. Therefore, the first matching entry may be the directory entry docs/ rather than a file entry.

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;

    CkZip zip = new CkZip();

    //  Open an existing ZIP archive.
    success = zip.OpenZip("c:/temp/sample.zip");
    if (success == false) {
        System.out.println(zip.lastErrorText());
        return;
        }

    //  ------------------------------------------------------------
    //  Find the first ZIP entry matching the wildcard pattern:
    //  
    //      docs/*
    //  
    //  Matching is performed against the full stored ZIP path.
    //  
    CkZipEntry entry = new CkZipEntry();

    success = zip.EntryMatching("docs/*",entry);
    if (success == false) {
        System.out.println("No matching entries found.");
        zip.CloseZip();
        return;
        }

    //  ------------------------------------------------------------
    //  Iterate through all matching entries.
    //  
    //  GetNextMatch updates the same ZipEntry object so that
    //  it represents the next matching entry.
    //  
    while ((success == true)) {
        if (entry.get_IsDirectory() == true) {
            System.out.println("[Directory] " + entry.fileName());
            }
        else {
            System.out.println("[File] " + entry.fileName());
            }

        //  Advance to the next matching entry.
        success = entry.GetNextMatch("docs/*");
        }

    zip.CloseZip();

    System.out.println("Done.");
  }
}