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Apache Fesod (Incubating) 2.0.1-incubating Officially Released

Shuxin Pan
Shuxin Pan

February 2026 — The Apache Fesod (Incubating) community is pleased to announce the official release of Apache Fesod (Incubating) 2.0.1-incubating.

This is not only a technical iteration but also a significant milestone: the first official release of Fesod since joining the Apache Software Foundation (ASF) Incubator. Over the past few months, the community has collaboratively completed extensive compliance improvements, architectural refactoring, and functional enhancements. This release marks Fesod’s readiness to embark on a new chapter of high-performance Excel processing under the ASF governance.

Milestone Significance: The First Official ASF Release​

As our "debut" in the incubator, version 2.0.1 represents a decisive step forward in embracing "The Apache Way":

  • Comprehensive Renaming & Compliance: We have completed the full transition from FastExcel to Fesod (including package names, class names, and documentation) to ensure the brand is fully protected under the ASF.
  • Compliance Completion: We have introduced the DISCLAIMER, NOTICE, and support modules, and implemented automated License Header management via Spotless, fully aligning with ASF policies.
  • Community Governance: All code merges and release processes were conducted through public discussion and voting on the mailing lists, reflecting the principles of openness and transparency.

Key Highlights​

1. Deep Architectural Refactoring​

To support long-term sustainability, we have significantly optimized the project structure:

  • Multi-module Architecture: Introduced a multi-module structure for clearer hierarchy and finer dependency management.
  • Distribution Enhancement: Added the fesod-distribution module to standardize the description and building of distribution packages.
  • JDK 25 Support: Keeping pace with the Java ecosystem, we have officially added compatibility and support for JDK 25.

2. New Features​

This release introduces several practical features to enhance the flexibility of Excel processing:

  • Enhanced Excel Processing: Added the afterSheetDispose lifecycle method in SheetWriteHandler and introduced a brand-new Header Merge Strategy.
  • Legacy Format Compatibility: Gracefully handles very old Excel BIFF formats to prevent runtime crashes.
  • Flexible Control: Added the autoStrip parameter and introduced validation for maximum Sheet name length in Workbook constants.
  • Website Experience: Added local search functionality and Matomo analytics to the official documentation, with optimized display for mobile devices.

3. Stability & Robustness​

We have invested heavily in quality assurance:

  • Fuzz Testing: Added daily fuzz testing for Excel reading to proactively identify potential crashes when processing malformed files.
  • Dependency Security: Upgraded core dependencies including Spring-core, Logback, Fastjson2, and POI (to 5.5.1) to resolve known vulnerabilities.
  • CI/CD Optimization: Introduced Netlify preview deployments and automated workflows for closing stale issues, significantly improving community collaboration efficiency.

Key Changes at a Glance​

Features​

  • Added afterSheetDispose method to SheetWriteHandler.
  • Introduced Header Merge Strategy for Excel writing.
  • Added GitHub Actions for Netlify preview deployments.
  • Integrated docusaurus-search-local for official website search.

Bugfixes​

  • Fixed NPE in the WriteSheetWorkbookWriteHandler class.
  • Fixed broken links and incorrect code examples in the documentation.
  • Updated import statements to use the shaded cglib package.

Refactoring​

  • Renamed project to Fesod/FesodSheet and updated package structures to align with Apache naming conventions.
  • Implemented Spotless for automated License Header management.
  • Removed outdated and incorrect @since tags.

For a detailed list of changes, please refer to the GitHub Release Notes.

Acknowledgments​

"Community Over Code" is the core philosophy of the Apache Software Foundation. We would like to thank all the developers, mentors, and community members who contributed to this release.

New Contributors​

We would like to extend a warm welcome and a special thank you to the 14 new members who made their first contribution in this release:

@X-qinghai, @ngocnhan-tran1996, @YIminta, @jounghu, @wlgusqkr, @gaushon, @GOODBOY008, @ongdisheng, @harshasiddartha, @pjfanning, @liugddx, @hezhangjian, @bengbengbalabalabeng

Special thanks to @delei, @psxjoy, @alaahong, @ongdisheng, @GOODBOY008, and everyone who submitted PRs and suggestions on GitHub. Your tireless efforts in renaming, compliance checking, CI optimization, and feature improvements have made Fesod's ASF debut a success.

How to Get Involved​

You can download and experience the new Apache Fesod (Incubating) through the following channels:

<dependency>
    <groupId>org.apache.fesod</groupId>
    <artifactId>fesod</artifactId>
    <version>2.0.1-incubating</version>
</dependency>

Join Us! The Apache Fesod (Incubating) community is always open to new contributors. You can reach out to us by subscribing to the mailing list at dev@fesod.apache.org or by submitting issues on GitHub.

We look forward to growing together within the Apache Incubator!