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Libraries that process spreadsheet files row by row to handle large datasets with minimal memory.
Distinct from Excel Processing Libraries: Distinct from Excel Processing Libraries: focuses specifically on streaming row-by-row processing rather than general read/write capabilities.
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Apache Fesod is a lightweight Java library that wraps Apache POI to provide a streaming API for reading and writing large Excel files. Its core identity is a low-memory spreadsheet processor that prevents out-of-memory errors by handling data row by row, never loading an entire document into memory at once. The library distinguishes itself through a listener-driven event model that fires row-level events to user code as each row is parsed, enabling incremental processing. It also includes an object mapping layer that maps spreadsheet rows directly to Java objects using configurable column map
Processes spreadsheets with hundreds of thousands of rows by streaming data instead of loading everything into memory.