Apache Poi Recipes

Apache POIRecipesPaolo Mottadelli - ApacheCon Oakland 2009

http://chromasia.comThursday, November 5, 2009

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- ApacheCon US 2009, Oakland - Apache POI Recipes -

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my to-do list

Thursday, November 5, 2009

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POI @ Content Tech

✴ Document to application (and back)✴ Publish data

✴ Build a doc from your content

✴ Know your documents✴ Extract text

✴ Extract content




1A-B-C



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POI modules (1): OLE2

✴ POIFS: reading/writing Office Documents

✴ HSSF r/w Excel Spreadsheets

✴ HWPF r/w Word Docs

✴ HSLF r/w PowerPoint Docs

✴ HPSF r/w property sets





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POI modules (2): OOXML

✴ XSSF: r/w OXML Excel

✴ XWPF: r/w OXML Word

✴ XSLF: r/w OXML PowerPoint




POI 3.5

http://chromasia.comThursday, November 5, 2009




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OOXML dev status

✴ XSSF: Final in POI-3.5

✴ XWPF: Draft (basic features)

✴ XSLF: Not covered (only text ext.)





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HSSF & XSSF

✴ Common user model interface

✴ User model based on existing HSSF

✴ Using OpenXML4J and SAX




2Same recipe, different flavours



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Common H/XSSF access

✴ org.apache.poi.ss.usermodel





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Upgrading to POI-3.5

✴ HSSFFormulaEvaluator.CellValue✴ convert from .hssf. to .ss.

✴ HSSFRow.MissingCellPolicy✴ convert from .hssf. to .ss.

✴ RecordFormatException in DDF✴ convert from .hssf. to .util. Dreadful Drawing Format




3MeetOffice Open XML



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Open XML

✴ XML based✴ WordprocessingML

✴ SpreadsheetML

✴ PresentationML

✴ Stored as a package✴ Open Packaging Conventions

made (very) simple





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Package concepts

✴ Package (the container)

✴ Part (xml file)

✴ Relationship✴ package-relationship

✴ part-relationship





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Expanded package, Excel





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WordprocessingML

✴ body✴ paragraphs

✴ runs

✴ properties (for runs and pars)

✴ styles

✴ headers/footers ...





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SpreadsheetML

✴ workbook✴ worksheets

✴ rows

✴ cells

✴ styles

✴ formulas

✴ images ...





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PresentationML

✴ presentation✴ slides

✴ slides-masters

✴ notes-masters

✴ layout, animation, audio, video, transitions ...




4openxml4j



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openXML4J

✴ Package, parts, rels

"/xl/worksheets/sheet1.xml"




5Text Extraction



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Extractors

✴ POITextExtractor✴ POIOLE2TextExtractor

✴ POIXMLTextExtractor

✴ XSSFExcelExtractor

✴ XWPFWordExtractor

✴ XSLFPowerPointExtractor

✴ If text is all what you need

getText()





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Text extraction

✴ made simple




6EXCELSimple Tasks



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New Workbook





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New Sheet





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Creating Cells





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Cell types





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Fills and colors




7EXCELImp/Exp to XML



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Export to XML





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xmlMaps.xml





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XML Import/Export




8WORDSimple Doc



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A simple doc





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9Use Case 1Alfresco Search



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Use Case

✴ Upload a document

✴ Detect document mimetype

✴ Extract text and metadata

✴ Create search index

✴ Search (and find) the document





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Without Tika✴ Detect the document mimetype

✴ (source/target mimetype)

✴ Get the proper ContentTransformer✴ (ContentTransformerRegistry)

✴ Tranform Doc Content to Text✴ (PoiHssfContentTransformer)

✴ Create Lucene indexPOI here





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With Tika





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Extension use case

✴ Adding support for Office Open XML documents (Office 2007+)✴ Word 2007+

✴ Excel 2007+

✴ PowerPoint 2007+





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POI text extractors

✴ Remember?





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Apache Tika (Excel)





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Apache Tika





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Apache Tika (Word)





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Apache Tika (Word)




10Use Case 2JM LaffertyFinancial Forecasting



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Make your wb look pro-

✴ Rich text

✴ Graphics

✴ Formulas & Named Ranges

✴ Data validations

✴ Conditional formatting

✴ Cell comments







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Formula evaluation

✴ The evaluation engine enables you to calculate formula results from within a POI application

✴ Formulas may be added to your workbook by POI

✴ Evaluation is available for .xls and .xlsx





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Formula evaluation (continued)

✴ All arithmetic operators are implemented

✴ Over 280 Excel built in functions are supported





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Formula evaluation (code)




11Use Case 3:CQ5 Import





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importDocument()





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getParagraphs(...)

✴ Makes use of✴ org.apache.poi.hwpf.usermodel.Range





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importDocument()





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getTitle(...)

✴ Gets the first paragraph’s text





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importDocument()





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12Want more?



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More Examples

✴ http://poi.apache.org/spreadsheet/examples.html




http://poi.apache.org/spreadsheet/quick-guide.html

http://poi.apache.org/spreadsheet/quick-guide.html


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Even more

✴ Get in touch✴ http://poi.apache.org/

✴ Get informed✴ [email protected]

✴ Get involved✴ http://svn.apache.org/repos/asf/poi/trunk/




http://poi.apache.org

http://poi.apache.org



http://svn.apache.org/repos/asf/poi/trunk/

http://svn.apache.org/repos/asf/poi/trunk/


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✴ Get slides✴ http://www.slideshare.net/paolomoz/apache-poi-recipes

Thanks




http://www.slideshare.net/paolomoz/apache-poi-recipes

http://www.slideshare.net/paolomoz/apache-poi-recipes

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Apache Poi Recipes

Technology