Apache POI Architecture

Apache POI have different classes and method to work upon different MS Office Document.

• POIFS It’s Stand for “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 It’s Stand for “Horrible Spreadsheet Format”. It is used to read and write xls format of MS-Excel files.
• XSSF It’s Stand for “XML Spreadsheet Format”. It is used for xlsx file format of MS-Excel.
• HPSF It’s Stand for “Horrible Property Set Format”.It is used to extract property sets of the MS-Office files.
• HWPF It’s Stand for “Horrible Word Processor Format”.It is used to read and write doc extension files of MS-Word.
• XWPF It’s Stand for “XML Word Processor Format”.It is used to read and write docx extension files of MS-Word.
• HSLF It’s Stand for “Horrible Slide Layout Format”.It is used for read, create, and edit PowerPoint presentations.
• HDGF It’s Stand for “Horrible Diagram Format”.It contains classes and methods for MS-Visio binary files.
• HPBF It’s Stand for “Horrible Publisher Format”. use for read and write MS-Publisher files.

POI stands For “Poor Obfuscation Implementation”. Apache POI is an API provided by Apache foundation which is a collection of different java libraries. These libraries gives the facility to read, write and manipulate different Microsoft files such as excel sheet, power-point, and word files. It’s first version release on 30 December 2001.