What is Apache POI API?

Apache POI is a popular API that allows programmers to create, modify, and display MS Office files using Java programs. It is an open source library developed and distributed by Apache Software Foundation to design or modify Microsoft Office files using Java program.

What is XSSF Workbook?

XSSF is the POI Project’s pure Java implementation of the Excel 2007 OOXML (. xlsx) file format. HSSF and XSSF provides ways to read spreadsheets create, modify, read and write XLS spreadsheets. They provide: low level structures for those with special needs.

What is XSSF in Java?

XSSF is prefixed before the class name to indicate operations related to a Microsoft Excel 2007 file or later. XSSFWorkbook and HSSFWorkbook are classes which act as an Excel Workbook. HSSFSheet and XSSFSheet are classes which act as an Excel Worksheet. Row defines an Excel row.

What is HSSF and XSSF?

HSSF is the POI Project’s pure Java implementation of the Excel ’97(-2007) file format. XSSF is the POI Project’s pure Java implementation of the Excel 2007 OOXML (. xlsx) file format.

Does Apache POI require Excel?

1 Answer. Yes, it works without Excel application in your VM.

Is Apache POI free to use?

The Licensing The POI project is OpenSource and developed/distributed under the Apache Software License v2. Unlike some other licenses, the Apache license allows free open source development.

What is difference between XSSFWorkbook and workbook?

Workbook is an interface, while HSSFWorkbook, SXSSFWorkbook, XSSFWorkbook are the clases that are implementing the Workbook interface. public interface Workbook High level representation of a Excel workbook. This is the first object most users will construct whether they are reading or writing a workbook.

What is the use of poi ooxml?

Apache POI XSSF implementation should be used for Excel 2007 OOXML (. xlsx) file format. Apache POI HSSF and XSSF API provides mechanisms to read, write or modify excel spreadsheets. Apache POI also provides SXSSF API that is an extension of XSSF to work with very large excel sheets.

What is POI project?

Apache POI, a project run by the Apache Software Foundation, and previously a sub-project of the Jakarta Project, provides pure Java libraries for reading and writing files in Microsoft Office formats, such as Word, PowerPoint and Excel.

Why Apache POI is used?

Apache POI is an open source java library to create and manipulate various file formats based on Microsoft Office. Using POI, one should be able to perform create, modify and display/read operations on following file formats.

Can Apache POI read CSV?

4 Answers. Apache POI was never designed to call on CSV files. While a CSV File may be opened in Excel, Excel has its own reader that does an auto import.

When to use poi-xssf / sxssf-Java API?

Since 3.8-beta3, POI provides a low-memory footprint SXSSF API built on top of XSSF. 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.

How to create an xssfsheet in Apache POI?

Creates an XSSFSheet representing the given package part and relationship. Ignore errors across a range of cells. Add ignored errors (usually to suppress them in the UI of a consuming application). Adds a merged region of cells on a sheet. Adds a merged region of cells (hence those cells form one).

What are the main classes of Apache POI?

Apache POI main classes usually start with either HSSF, XSSF or SXSSF. HSSF – is the POI Project’s pure Java implementation of the Excel ’97 (-2007) file format. e.g. HSSFWorkbook, HSSFSheet. XSSF – is the POI Project’s pure Java implementation of the Excel 2007 OOXML (.xlsx) file format. e.g. XSSFWorkbook, XSSFSheet.

How to use the xssfcell API in Java?

Return a formula for the cell, for example, SUM(C4:E4) protected java.lang.String getCellFormula(BaseXSSFEvaluationWorkbook fpb) package/hierarchy use only – reuse an existing evaluation workbook if available for caching XSSFCellStyle getCellStyle() Return the cell’s style.