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Apache POI is modular. Depending on which file formats you need to support, you may need different artifacts: 1. Modern Office Formats (OOXML)

For very large Excel files, use the SXSSF (Streaming User Model) included in the ooxml package to prevent OutOfMemoryError . poi jar download maven

If your application needs to handle both old and new formats, include both: poi poi-ooxml poi-scratchpad (for Outlook, Publisher, and Visio) 🛠️ Implementation Steps Step 1: Update your pom.xml Apache POI is modular

Apache POI 5.x requires additional dependencies like log4j-api and commons-io . Maven handles these automatically, but ensure you aren't excluding them in your build configuration. 💡 Pro Tips for Developers poi jar download maven