Java-API-POI-Excel：SXSSFWorkbook Documentation

Posted 2021-02-13 storebook

ylbtech-Java-API-POI-Excel：SXSSFWorkbook Documentation

 

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org.apache.poi.xssf.streaming

Class SXSSFWorkbook

• java.lang.Object
• • org.apache.poi.xssf.streaming.SXSSFWorkbook

• All Implemented Interfaces:

  java.io.Closeable, java.lang.AutoCloseable, java.lang.Iterable<Sheet>, Workbook

  Direct Known Subclasses:

  SXSSFWorkbookWithCustomZipEntrySource

  ---

  
  

  public class SXSSFWorkbook
  extends java.lang.Object
  implements Workbook

  Streaming version of XSSFWorkbook implementing the "BigGridDemo" strategy. 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. You can provide a template workbook which is used as basis for the written data. See https://poi.apache.org/spreadsheet/how-to.html#sxssf for details. Please note that there are still things that still may consume a large amount of memory based on which features you are using, e.g. merged regions, comments, ... are still only stored in memory and thus may require a lot of memory if used extensively. SXSSFWorkbook defaults to using inline strings instead of a shared strings table. This is very efficient, since no document content needs to be kept in memory, but is also known to produce documents that are incompatible with some clients. With shared strings enabled all unique strings in the document has to be kept in memory. Depending on your document content this could use a lot more resources than with shared strings disabled. Carefully review your memory budget and compatibility needs before deciding whether to enable shared strings or not.

• • Field Summary

    Fields

    Modifier and Type	Field and Description
    static int	DEFAULT_WINDOW_SIZE Specifies how many rows can be accessed at most via SXSSFSheet.getRow(int).

    • Fields inherited from interface org.apache.poi.ss.usermodel.Workbook

      PICTURE_TYPE_DIB, PICTURE_TYPE_EMF, PICTURE_TYPE_JPEG, PICTURE_TYPE_PICT, PICTURE_TYPE_PNG, PICTURE_TYPE_WMF

  • Constructor Summary

    Constructors

    Constructor and Description
    SXSSFWorkbook() Construct a new workbook with default row window size
    SXSSFWorkbook(int rowAccessWindowSize) Construct an empty workbook and specify the window for row access.
    SXSSFWorkbook(XSSFWorkbook workbook) Construct a workbook from a template.
    SXSSFWorkbook(XSSFWorkbook workbook, int rowAccessWindowSize) Constructs an workbook from an existing workbook.
    SXSSFWorkbook(XSSFWorkbook workbook, int rowAccessWindowSize, boolean compressTmpFiles) Constructs an workbook from an existing workbook.
    SXSSFWorkbook(XSSFWorkbook workbook, int rowAccessWindowSize, boolean compressTmpFiles, boolean useSharedStringsTable) Constructs an workbook from an existing workbook.

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http://poi.apache.org/apidocs/dev/org/apache/poi/xssf/streaming/SXSSFWorkbook.html

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