Is there any way to generate Xlsx (2007) using xmlss? - java

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.

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convert excel to pdf using itext API programmatically in java

I am looking for utility to convert Excel to PDF using iText API. Find many sources like this (Convert excel to pdf using iText) but not working out for huge data in Excel (around 15 MB excel file with 18 columns and 15,00,000 rows) as it is giving Out of memory exception. Need an utility to transform xlsx file and store it as PDF in local drive.

What is the difference between poi and poi-ooxml

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

Convert excel file from XLSX to XLSB in Java

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.

How to convert ms-Excel file to Pdf in java?

Because I have used JXL api for excel but now I want to convert it to Pdf file so please tell me how to change my code to convert excel to pdf?

You could use iText to create a pdf file in java and use Apache POI to access the data in the MS-EXCEL file. If you combine both, you could convert your excel file.
A raw example is given here
Also, there is this new API:
You can try Aspose.Cells for Java which allows you to convert Excel file to PDF in Java applications. It doesn't require MS Office/OpenOffice etc to be installed on your development or deployment machine. It also works on both Windows and Linux platforms. The code is very simple as shown below:
//Instantiate a new workbook with excel file path
Workbook workbook = new Workbook("F:\\FileTemp\\Book1.xls");
//Save the document in Pdf format
workbook.save("F:\\FileTemp\\MyPdfFile.pdf", FileFormatType.PDF);

Excel (.xlsx) to PDF using Java

Is it possible to do .xlsx to PDF conversions using DOCX4J?
If so, could anyone provide me with some samples please?
If it isn't possible, what alternatives would you suggest?

I don't think you can use DOCX4j to convert your xlsx to PDF.
You just can use DOCX4j to manipulate Excel xlsx, but not PDF. So you also need a java lib for manipulating PDF, I recommond iText

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