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Editorial Team
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Asked: 2026-06-02T18:04:59+00:00

This question is about Jasper Reports. Suppose I want to create a Jasper Report

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This question is about Jasper Reports.

Suppose I want to create a Jasper Report using JRBeanCollectionDataSource like this …

jasperPrint = JasperFillManager.fillReport(JRLoader.getInputStream(fileName), parameters, new JRBeanCollectionDataSource(aList));

And suppose that the PoJo I am using has a Property of type List.

How can I access

  1. The individual items in this List,
  2. and if this item is itself a Pojo access it’s properties in Jasper Report XML
    file.

For example in the Jasper XML file: 

...field name="?????" class="java.lang.String" ...

Thanks for your help …

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1 Answer

  1. Editorial Team

    If your data source has fields of type List (more generally, of type java.util.Collection), then you can use a Table or List or Subreport component to iterate through them. Use one of those elements and set its data source like this:

    new net.sf.jasperreports.engine.data.JRMapCollectionDataSource($F{myListField})

    You could also add your own helper class with a static method to deal with these fields appropriately.

    This comes up a lot with MongoDB. I wrote an article on Collections in JasperReports. It uses MongoDB as the data source… but it would apply equally well to your POJO data source.

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