Save file using FileOutputStream() and pass output file name.Insert data in 2000 rows and 2000 cells by using createRow(), createCell() and setCellValue("Your data") inside and a nested loop.Create a new worksheet using createSheet() method.Create a new SXSSFWorkbook and keep 100 rows in memory, exceeding rows will be flushed to disk.You can create a large excel file in java by using the following steps Create Large Excel File using Java Older rows that are no longer in the window become inaccessible, as they are written to the disk. POI-SXSSF achieves its low memory footprint by limiting access to the rows that are within a sliding window, while XSSF gives access to all rows in the document. This allows writing very large files without running out of memory as only a configurable portion of the rows are kept in memory at any one time. Create Large Excel Spreadsheets using Java APIĪpache POI XSSF offers low-memory footprint via SXSSF API for handling large data writing to MS Excel files.
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