Mirror of Apache Commons IO

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  1. 0a175dd Bump PMD implementation from 6.47.0 to 6.48.0. by Gary Gregory · 31 hours ago master
  2. e7e5ef2 Bump Maven Javadoc plugin from 3.4.0 to 3.4.1. by Gary Gregory · 31 hours ago
  3. de2f4ed Bump mockito-inline from 4.6.1 to 4.7.0 by Gary Gregory · 31 hours ago
  4. 679a032 Hack to get a test to pass on macOS and Java 8 by Gary Gregory · 2 days ago
  5. 7ced1e8 Try to fix build on GitHub for Windows and Java 17. by Gary Gregory · 2 days ago

Apache Commons IO

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The Apache Commons IO library contains utility classes, stream implementations, file filters, file comparators, endian transformation classes, and much more.


More information can be found on the Apache Commons IO homepage. The Javadoc can be browsed. Questions related to the usage of Apache Commons IO should be posted to the user mailing list.

Where can I get the latest release?

You can download source and binaries from our download page.

Alternatively you can pull it from the central Maven repositories:



We accept Pull Requests via GitHub. The developer mailing list is the main channel of communication for contributors. There are some guidelines which will make applying PRs easier for us:

  • No tabs! Please use spaces for indentation.
  • Respect the code style.
  • Create minimal diffs - disable on save actions like reformat source code or organize imports. If you feel the source code should be reformatted create a separate PR for this change.
  • Provide JUnit tests for your changes and make sure your changes don't break any existing tests by running mvn clean test.

If you plan to contribute on a regular basis, please consider filing a contributor license agreement. You can learn more about contributing via GitHub in our contribution guidelines.


This code is under the Apache Licence v2.

See the NOTICE.txt file for required notices and attributions.


You like Apache Commons IO? Then donate back to the ASF to support the development.

Additional Resources