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Overview
Apache Commons IO is a Java I/O utility library providing helper classes, stream implementations, file filters, comparators, endian transformations, and related functionality.
Features and best fit
Based on official documentation; not hands-on tested · Content checked:
Key features
Move repetitive stream and file operations into reusable utilities
The README describes utility classes, stream implementations, file filters, file comparators, endian transformations, and more.
Sources: [2]
Add a focused I/O dependency from Maven Central
The README shows the commons-io:commons-io:2.22.0 artifact as a standalone library for complementing Java I/O APIs.
Sources: [2]
Best fit
Fits backends with file upload, batch, import, and export workflows
It is useful when services want shared implementations for stream copying, file inspection, filtering, and comparison instead of repeated local helpers.
Sources: [2]
Before adoption
Keep large-file, encoding, resource, and path-security behavior explicit
Convenience helpers do not remove I/O resource or security concerns. Applications should still define file-size limits, character encodings, resource lifecycles, and path validation.
Sources: [2]
Official sources
- [1]apache/commons-io — GitHub repository(2026-10-06)
- [2]Apache Commons IO — README(2026-10-06)
Supplemental curator note
It is useful for reducing repetitive Java I/O code. Keep large-file behavior, encodings, resource lifecycles, and path validation explicit instead of hiding them behind convenience helpers.
Try it in 3 steps
- 1
Get the source
git clone --depth 1 https://github.com/apache/commons-io.git - 2
Enter the repository
cd commons-io - 3
Check the official steps
Continue with the commands in the README Installation, Quick Start, or Getting Started section.
find . -maxdepth 1 -iname 'README*' -exec sed -n '1,220p' {} \; -quit
Growth
Growth trends · Last 30 days
1,081 Stars
Trend data is still being collected.
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Categories and tags
Categories
GitHub data
GitHub dataView detailed GitHub data
GitHub Topics
- commons
- Stars
- 1,081
- Forks
- 744
- Watchers
- 1,081
- Open issues
- 26
- Contributors
- 125
- Owner type
- Organization
- Primary language
- Java
- License
- Apache-2.0
- Repository last updated
- Oct 3, 2026
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