How to merge archives to ZIP using Java

ZIP Merger Java API

GroupDocs.Merger allows developers to combine multiple archive documents in the preferred order and save them as a single ZIP file.

About ZIP File Format

A file with .zip extension is an archive that can hold one or more files or directories. The archive can have compression applied to the included files in order to reduce the ZIP file size. ZIP file format was made public back in February 1989 by Phil Katz for achieving archiving of files and folders. The format was made part of PKZIP utility, created by PKWARE, Inc. Right after the availability of available specifications, many companies made ZIP file format part of their software utilities including Microsoft (since Windows 7), Apple (Mac OS X ) and many others.

How to merge archives to ZIP file

The following example demonstrates how to merge archives to ZIP file with several lines of Java code:

  • Create an instance of Merger class and pass source archive file path as a constructor parameter. You may specify absolute or relative file path as per your requirements.
  • Add another archive file to merge with Join method. Repeat this step for other archive documents you want to merge.
  • Call Merger class Save method and specify the filename for the merged archive file as parameter.
// Load the source archive file
Merger merger = new Merger("c:\");
    // Add another archive file to merge
    // Merge archive files and save result"c:\");

Code Examples

Please find more use-cases and complete Java sources of our backend and frontend examples and try them for free!

Merge Archives Live Demo

GroupDocs.Merger for Java provides online ZIP Merger App and TAR Merger App, which allow you to try it for free and check its quality and accuracy.