Apache poi streaming. .

Apache poi streaming. If you've used Apache POI in the past to read in Excel files, you probably noticed that it's not very memory efficient. com Apr 27, 2025 · SXSSF provides a memory-efficient way to generate large Excel workbooks by streaming data to disk. Nov 19, 2015 · Since POI takes up a large amount of heap to work, often throwing OutOfMemory errors, I found out that there is a Streaming API for handling excel data in a serial fashion (rather than loading the file completely into memory) See full list on roytuts. With its row windowing approach, it allows creation of spreadsheets with millions of rows while maintaining a small memory footprint. 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. Following. SXSSF is an API-compatible streaming extension of XSSF to be used when very large spreadsheets have to be produced, and heap space is limited. Streaming version of XSSFWorkbook implementing the "BigGridDemo" strategy. Jan 1, 2024 · Apache POI provides three main workbooks for working with Excel files: HSSFWorkbook (Horrible Spreadsheet), XSSFWorkbook (XML Spreadsheet), and SXSSFWorkbook (Streaming Workbook). This allows to write very large files without running out of memory as only a configurable portion of the rows are kept in memory at any one time. Reading in an entire workbook will cause a severe memory usage spike, which can wreak havoc on a server. adauzw dfdil hzfv gfbamewxa uoim erjd xkegak svxx stg zmq