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Read / Write Excel file (.xls or .xlsx) using Apache POI
The memory footprint of reading big files can be ridiculously large for APACHE POI . Instead of using the .xlsx and .xls directly lets convert them to CSV. Latter do whatever you want.
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Read / Write Excel file (.xls or .xlsx) using Apache POI. Playing with APACHE POI, HSSF, XSSF, SAX, CSV and CSV reader is a fun indeed