What is Apache POI?
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. It contains classes and methods to decode the user input data, or a file into MS Office documents.
Components of Apache POI
Apache POI contains classes and methods to work on all OLE2 Compound documents of MS-Office. The list of components of this API is given below:
- POIFS (Poor Obfuscation Implementation File System) : This component is the basic factor of all other POI elements. It is used to read different files explicitly.
- HSSF (Horrible SpreadSheet Format) : It is used to read and write .xls format of MS-Excel files.
- XSSF (XML SpreadSheet Format) : It is used for .xlsx file format of MS-Excel.
- HPSF (Horrible Property Set Format) : It is used to extract property sets of the MS-Office files.
- HWPF (Horrible Word Processor Format) : It is used to read and write .doc extension files of MS-Word.
- XWPF (XML Word Processor Format) : It is used to read and write .docx extension files of MS-Word.
- HSLF (Horrible Slide Layout Format) : It is used to read, create, and edit PowerPoint presentations.
- HDGF (Horrible DiaGram Format) : It contains classes and methods for MS-Visio binary files.
- HPBF (Horrible PuBlisher Format) : It is used to read and write MS-Publisher files.
This tutorial guides you through the process of working on Microsoft PowerPoint presentation using Java. Therefore the discussion is confined to XSLF component.
Note : Older versions of POI support binary file formats such as doc, xls, ppt, etc. Version 3.5 onwards, POI supports OOXML file formats of MS-Office such as docx, xlsx, pptx, etc.