Hello Mark,
Can we have a look at some code please? We need to know how you are getting the
cell styles from the template in the firast place, how you are storing them,
what you are doing when you create a cell, etc.
In your case, I would create a pool of cell styles - use one of the collection
Hi all,
I'm currently converting an XMLSS based file into a real Excel file. The
XMLSS based file is about 100-200MB (yes it's one hundred to two hundred
megabytes) containing about 30k records. I have been able to parse the
XML file within 10-20seconds, but the problem comes when creating the
Hi Winarto,
>It is always throwing java.lang.OutOfMemoryError:
>Java heap space error in around 15-16k records. Is there any tips or
>advise that I can use to avoid that error?
had the same problem, just give the Java virtual machine more heap.
%jre_path%java -Xms128m -Xmx512m -classpath ...
Th
Hello togeher,
I've written an application using POI for creating and writing Excel
spreadsheets.
Works fine so far but I've got following problem:
I've got an existing Excel spreadsheet which I'd like to customize, e.g.
first
A
1 0
2 0
3 0 (content of cell:=sum(A1..A2))
then after Java-proce
Hi Karsten,
Just call HSSFFormulaEvaluator.evaluateAllFormulaCells(workbook) to refresh
the whole workbook formula results.
For you getRow() issue, I think this has been changed since POI 3.2.
In this version the method signature is :
HSSFRow org.apache.poi.hssf.usermodel.HSSFSheet.getRow(int row
Hi Winarto,
sorry for not seeing that you configured your JVM.
I had ASCII-files with about 170.000 lines, which I transferd in an Excel
spreadsheet (the *.xls was about 50MB). This worked fine with POI 3.1. Ok your
files are about 4 times bigger, but it should work out too.
Best regards...
I cannot recall the details - and it may not therefore be exactly applicable
here - but I think that Yegor proposed a solution for creating very large files
a few months ago. It involved creating template files and then populating them
and I am not at all clear on the details. If you can visit t
OK Mark, here is one very simple example - well in the attached files there is.
If you look first at the Excel temple file, you will see that it contains five
columns each with a title in the topmost cell. The cell in row two of each
column has been formatted - a date, an integer, a floating poi
Hi Karsten,
I've managed to reduce the number of objects that I'm creating (i.e. reuse the
existing object instead of using 'new' keyword), and it has help to parse more
records than before. However outofmemoryerror is now always pointing to the
creation of POI object, which I don't have much co
Just had a quick search myself and found the response from Yegor that I was
looking for. It will not work for you however as I think he is talking about
creating large xml files. Have pasted his reply below;
Unfortunately poi-ooxml has quite a good appetite for memory, under same
conditions you
Anthony Andrews wrote:
>
>
> Hello Mark,
>
> Can we have a look at some code please? We need to know how you are
> getting the cell styles from the template in the firast place, how you are
> storing them, what you are doing when you create a cell, etc.
>
>
I will work on creating an exampl
Must admit Mark that I have seen some problems with regard to Date/Time cells
that is very similar to your 'setting type before value' problem. Also, there
was a cloneStyleFrom() method added to the HSSFCellStyle class some time ago
and it seemed to disappear again. If it is still there, then it
Anthony Andrews wrote:
>
> Must admit Mark that I have seen some problems with regard to Date/Time
> cells that is very similar to your 'setting type before value' problem.
> Also, there was a cloneStyleFrom() method added to the HSSFCellStyle class
> some time ago and it seemed to disappear ag
You can clone using something like:
public static HSSFCellStyle cloneStyle(HSSFWorkbook wb,
HSSFCellStyle src){
HSSFCellStyle style = wb.createCellStyle();
style.setFont(wb.getFontAt(src.getFontIndex()));
style.setAlignment(src.getAlignment());
style.setBord
Thank you for your help, David. Are you saying that I should not close the
style using
the cloneStyleFrom() method on the HSSFCellStyle object? This method is in
the
3.2-FINAL release I'm using and seems to be working.
Is it going to be removed in a later release?
Thanks,
David Fisher wrote:
>
If it is working go ahead. The code I quoted from is from a special
class of ours that we use to manage Styles in our XLS creation process.
It helps to remind everyone that styles are stored in the workbook and
then later associated with a cell. It really helps to manage your
styles as quic
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