I am trying to generate Jasper reports using Java program. Most of the times the cells aren't properly filled in the XLSX file (I have made sure in the iReport they(fields and titles) use the same widths). The text in the cells sometimes appears to be concatenated. Can someone help on how to insert data in a xls row properly.
Also need to know if querying data from jrxml is better or passing a list to jrxml is better (Performance wise).
Thanks in advance.
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I am filling cells of an Excel file using Apache POI, and there are a lot of formula cells in the document. However, their values are not refreshed when I open the document in Excel.
It's my understanding that I need to use a FormulaEvaluator to refresh formula cells. Is there a way, though, to update all formula cells at once? There are a lot of them, and while making an exhaustive list is not out of question, it's certainly not something I'm very willing to do.
Sure. Refreshing all the formulas in a workbook is possibly the more typical use case anyway.
If you're using HSSF, call evaluatorAllFormulaCells:
HSSFFormulaEvaluator.evaluateAllFormulaCells(hssfWorkbook)
If you're using XSSF, call evaluatorAllFormulaCells:
XSSFFormulaEvaluator.evaluateAllFormulaCells(xssfWorkbook)
More details are available on the poi website
wb.setForceFormulaRecalculation(true);
// replace "wb" with your HSSFWorkbook/XSSFWorkbook object
https://poi.apache.org/apidocs/org/apache/poi/hssf/usermodel/HSSFWorkbook.html#setForceFormulaRecalculation-boolean-
https://poi.apache.org/apidocs/org/apache/poi/xssf/usermodel/XSSFWorkbook.html#setForceFormulaRecalculation-boolean-
I am using iReport version 5.6.
Right now we're analyzing the requirement for a new project where the requirement is as follows.
We have a report which is designed in jrxml with almost 20 fields where user has to scroll to the right to get all values and hence tedious for the user when result size is too large.
Suggested requirement is as to configure the jrxml in such a way that user can select the column name for which the report should be generated.
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We have done study on this and found the only possible solution may be to create a jrxml for each possible combination which seems to be not efficient for our project.
Could you please suggest is there any possible way to handle this situation?
Instead of using a seperate .jrxml file for each "view" you could duplicate the bands and use printWhen expressions to determine which band to display. Not a lot better than having separate .jrxml files but at least all the logic will be in the same file.
Another idea is to use parameters like showColA,showColB etc. Use those parameters to determine the column headers and values of those columns (this could get a little messy though)
I'm trying to perform automaticaly table extraction inside PDF. I know there are several libraries and methods Java and Python, but to my surprise, the method that has worked best for me is to convert my Pdf to a Docx document and from there to extract the tables (thanks to: How to get pictures and tables from .docx document using apache poi?).
My question is this: Assuming that within the format conversion there may be loss of information, why are my results better this way? Tabula hasn't been able to do better automatically. To understand this, I have looked for information (e.g. Extracting table contents from a collection of PDF files) but I'm still very confused.
PD: For the moment, I have used https://github.com/thoqbk/traprange (A method based on Pdfbox), How to extract table as text from the PDF using Python? (PyPdf2) and Tabula. When I get to my home I going to put code and cases, I'm writing from my smartphone.
I am using jasper Reoprt Ireport 3.0 for Generating excel. my problem is I have One text field in that i want to keep below data which is coming from my database.
**Disclaimer: Please note that in case of disease conditions which can have both Acute and Chronic manifestations, they are considered as Chronic illness for analysis keeping in view the objective of the report.
Actually in jasper reoprt summary area i have given one text field but it is too small too keep this above line data. but still I want to keep whole data in small field in excel .
because normaly when we are typing in excel cell anything and when it become overflows then also it's looking like it has been typed in next cell but ,when we are clicking in another cell it will show in that cell only.whole data will come in that small cell without wrapping text filed.
just like it i want also through I-report 3.0 . I tried so much but I didn't find solution so i am posting here . please suggest if you faced same problem and got solution too. it will be helpful.
I don't want to merge it in multiple columns because if it will merge multiple columns then for calculating value through Excel column selection will be a problem. and V lookup we cant do so.
if the data in any cell is greater than 2 rows, then the remaining data just gets cut off and not displayed.
Maybe it is time to update. At this time JasperReports 6.x is the version to go, but ...
From my expierience JasperReports is the wrong tool to generate "clean" Excel documents. You get always layout informations in it that result in the behaviour you describe.
To get a clean Excel document I would suggest to go with Apache-Poi (https://poi.apache.org/) and generate it directly or simply to generate a CSV - file which can be easily opened using Excel.
I would like to know how to export the contents of a table or the data from a query to an Excel file. Also wich is the file extension that is better to export to, xls or csv?
Thanks in advance.
Edit: What i want is the user to to be able to export the contents of a JTable -containing the results from a query- to an Excel compatible file, by pressing a button.
I don't know what is the best way to do it? I found various ways but i'm not sure which one to follow. Is it possible to generate a JasperReport then export tha same data to excel?
Edit2:Ok so i decided to export to .csv like most of you suggest. My last question is which one is better to use, opecsv or javacsv? Both seem really easy to use.
Thanks!
Exporting to csv is easier - and could be done manually in a pinch depending on the data (Each new row is a new line, and cell values are seperated by a comma) - There are open source libraries available for this (http://opencsv.sourceforge.net/), and the code for copying a resultset to your output should be trivial
If you absolutely need Excel, use the Apache POI library.
You have to create text file (csv) and write the result of database.
PrintWriter out
= new PrintWriter(new BufferedWriter(new FileWriter("foo.csv")));
while(rs.next())
{
out.println(String.format("%s,%s,%s",rs.getString(1),rs.getString(2),rs.getString(3));
}
In addition to the answers already given, I would like to say that I would prefer CSV.
CSV is application-agnostic and you could manipulate the data later on with any other language/program (Python, R, Java, Excel, etc).
I had good success with jXLS:
http://jxls.sourceforge.net/
this lets you use JSP-like tags in a native Excel template with all the formatting etc. You pass data to substitute into that Excel template from Java API calls, via a Map structure (analogous to request scope vars.)
This is a good lighter-weight alternative to JasperReports if you just want formatted Excel output.