Recommendations on a free library to be used for zipping files

Question

I need to zip and password-protect a file. Is there a good (free) library for this?

This needs to be opened by a third party, so the password protection needs to work with standard tools.

Answer 1

You can try Zip4j, a pure java library to handle zip file. It supports encryption/ decryption of PKWare and AES encryption methods.

Key features:

• Create, Add, Extract, Update, Remove files from a Zip file
• Read/Write password protected Zip files
• Supports AES 128/256 Encryption
• Supports Standard Zip Encryption
• Supports Zip64 format
• Supports Store (No Compression) and Deflate compression method
• Create or extract files from Split Zip files (Ex: z01, z02,...zip)
• Supports Unicode file names
• Progress Monitor

License:

• Zip4j is released under Apache License, Version 2.0.