I'm learning about data driven testing using Selenium and Excel. I'm taking an online course that has asked used to add the Apache poi and poi-ooxml dependencies in Maven.
I'm struggling to understand what the differences between the two are. Are both required in order to retrieve data in Excel and pass these to our tests?
Thanks
Excel files has long history
Excel 97-2003 workbook:
This is a legacy Excel file that follows a binary file format. The file extension of the format is .xls.
Excel 97-2003 in terms of apache poi is called - Horrible Spreadsheet Format As the Excel file format is complex and contains a number of tricky characteristics,
apache-poi jar has code to handle these file
Excel 2007+ workbook:
This is the default XML-based file format for Excel 2007 and later versions. It follows the Office Open XML (OOXML) format, which is a zipped, XML-based file format developed by Microsoft for representing office documents. The file extension of the format is .xlsx. ( DOCX,PPTX are other OOXML based examples).
Excel 2007+ workbook in terms of apache poi is called - XML Spreadsheet Format -these file format are advanced version of HSSF and has additional features, code to handle these files are written in apache-poi-ooxml jar
More reading
As .xls is almost dead but still some applications use it, so for backward compatibility both dependencies are required.
here is what Apache have to say -
HSSF Excel XLS poi For HSSF only, if common SS is needed see below
Common SS Excel XLS and XLSX poi-ooxml WorkbookFactory and friends
all require poi-ooxml, not just core poi
you can read more at their official website http://poi.apache.org/components/index.html#components
Related
I am using Java + Apache POI to generate an excel file (format xlsx/xls). Due to huge data the generated excel file (format xlsx/xls) takes more size (~50 MB).
So I am trying to convert xlsx/xls to xlsb to reduce the size of the excel file.
Here is the problem: Apache POI does not support writing to xlsb file. So what I am trying is:
Generate a xlsx/xls file using Apache POI.
After that convert generated xlsx/xls to xlsb. For this I am using
SmartXls Java library. But this library is not open source. You need to
buy license for this. Also I checked EasyXls Java library, but it also requires buying a license.
Below code is used to convert xlsx/xls to xlsb using SmartXls Java library:
WorkBook wb = new WorkBook();
wb.readXLSX(.../xlsxPath);
wb.writeXLSB(new java.io.FileOutputStream(.../xlsbPath));
wb.dispose();
Kindly someone help me whether any open source library is available for it or is there any other way to do this conversion in Java.
Thanks in advance.
I am looking for any Java library which can convert Word doc into PowerPoint format.
I have looked into some libraries such as documents4j which converts many of the formats but not Word doc into PowerPoint.
Look at Apache Poi: https://poi.apache.org.
From their mission statement:
The Apache POI Project's mission is to create and maintain Java APIs for manipulating various file formats based upon the Office Open XML standards (OOXML) and Microsoft's OLE 2 Compound Document format (OLE2). In short, you can read and write MS Excel files using Java. In addition, you can read and write MS Word and MS PowerPoint files using Java. Apache POI is your Java Excel solution (for Excel 97-2008). We have a complete API for porting other OOXML and OLE2 formats and welcome others to participate.
OLE2 files include most Microsoft Office files such as XLS, DOC, and PPT as well as MFC serialization API based file formats. The project provides APIs for the OLE2 Filesystem (POIFS) and OLE2 Document Properties (HPSF).
I have extensively used this library with Word and Excel and it is really working well.
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.
Are there any export limitations when using HSSF?
I've once read somewhere that Excel '97 just supported <65.000 Entries.
Is it safe to use HSSF to export excel sheets with more than 65.000 Entries, or why would I use XSSF?
As you can see here Excel 97 to 2003 supports a maximum of 65,536 rows. So no, with HSSF you won't be able to store more than 65536 entries. However you can do it with XLSX (Excel 2007+) which can handle up to 1,048,576 rows and can be saved using XSSF. It won't be compatible with Excel 97/2003 though.
When saving an excel sheet (xls - 2330) in .xml form, the xmlss file will contain the respective xsl code. But in xlsx i can't save the file with .xml format.
Also is there any specific Apache POI API availabe to convert .xls (2003) to .xlsx(2007) format?
Since the POI creates the xmlss file to create the xlsx, is there any simpler option?
related links:
http://msdn.microsoft.com/en-us/library/aa140066%28office.10%29.aspx#odc_xmlss_x:header
Greetings in advance.
My application requires a reporting facility in excel/csv format. In case of large report, the generated CSV is corrupt. Though i am able to e-mail the generated CSV using smtp.
I tried changing the following with no lead, your help on this is appreciated
Change the library to POI
Changed the library to JXL
Monitored if there is a memory leakage
This is a web based application and the code is written in JSP.
POI is mainly for MS office formats like xls, xlsx, doc. JXL is also for xls files. You should use a framework which is for CSV like OpenCSV.