Apache Commons Validator

Clone this repo:
  1. 5812304 Bump commons-parent from 57 to 58 by Gary Gregory · 2 weeks ago master
  2. d53f4c4 Grammar by Gary Gregory · 2 weeks ago
  3. f4560d7 Clean up and simplify exception handling by Gary Gregory · 3 weeks ago
  4. faf8f6a Clean up Exceptions and formatting by Gary Gregory · 3 weeks ago
  5. 35f43a6 Javadoc: Use {@code } instead of HTML tags. by Gary Gregory · 6 weeks ago

Apache Commons Validator

GitHub Actions Status Coverage Status Maven Central Javadocs CodeQL

Apache Commons Validator provides the building blocks for both client side validation and server side data validation. It may be used standalone or with a framework like Struts.


More information can be found on the Apache Commons Validator homepage. The Javadoc can be browsed. Questions related to the usage of Apache Commons Validator 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.

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 Validator? Then donate back to the ASF to support the development.

Additional Resources