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data from data base to excel in servlet

 
carina caoor
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Hi, i am using APache POI XSSF to create an xlsx file , and have selected few column from a table and writing it down in the excel. As the rows returned are more than 10000 , the excel created writes only 8000 rows into it and abrubtly stops without saving the file in temporary location. I want to write large dataset from database to excel .. which API do i need to use... please suggest..
 
Vicky Vijay
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Try this,

JEXCEL API
 
carina caoor
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Does this supports xlsx file. ALso will it handle java heap space error if the file is too large...
 
Vicky Vijay
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It supports the following format,


Reads data from Excel 95, 97, 2000, XP, and 2003 workbooks
Reads and writes formulas (Excel 97 and later only)
Generates spreadsheets in Excel 2000 format


Check this FAQ - (How do I get rid of OutOfMemory exceptions?)

http://jexcelapi.sourceforge.net/resources/faq/
 
Tim Moores
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Isn't there an exception of some kind? I'm fairly certain that there is no intrinsic limit of 8000 rows; maybe a memory problem if you also have many columns (POI is kind of a memory hog). The only other free API I'm aware is jExcelApi, and that doesn't support XLSX, only XLS.

If the exception is indeed a memory problem, just give the JVM more to work with (-Xms -Xmx).
 
carina caoor
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Itried increasing the jvm memory through -Xmx and -Xms.. but it writes only to certain rows like around 8k or 10k.. and stops abrubtly... Does JExcel API writes to XLS files with out any problem though the file size may be around 50k
 
Tim Moores
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I'm having a bit of a hard time understanding that it stops without any exception.
 
carina caoor
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did anybody try Aspose? does it supports heavy data around 50k or more rows witing to excel 2007 files.... please suggest.
 
It is sorta covered in the JavaRanch Style Guide.
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