I'm using JasperReports and iReport (output to PDF), and I have a problem with a certain report:
Inside the report I have defined a group. On average, each "instance" of that group only contains a small number of detail rows, so I don't want each of them to start on a new page, since it would be a waste of paper (the output is printed on paper).
But on the other hand, I don't want to have a group that starts on one page and ends on the next one. For example, if on page 1 I can fit the first two groups and half of the third group, I want the entire third group to start on page 2, and so on.
Is there any way to do that?
The "group" property keepTogether and isStartNewPage will solve your problem and makes group result together and always starts new group from new page.
<group name="CITY" isStartNewPage="true" keepTogether="true">
<groupExpression><![CDATA[$F{CITY}]]></groupExpression>
<groupHeader>
...
</groupHeader>
</group>