How to validate empty report in JasperReports?

Question

My situation is when I\'m not able to retrieve anything with my query, that is found inside the jasper file, a report is still generated.

I\'m using this line of code t

Answer 1

Set on jasperReport tag whenNoDataType="NoPages" or remove whenNoDataType attribute (default is "NoPages")

Check how many pages there are in the JasperPrint, if 0 you have NoData

    JasperPrint print = JasperFillManager.fillReport(jasperReportStream, params, jdbcConnection);
    List<JRPrintPage> pages = print.getPages();
    if (pages.size()==0){
            //No pages, do not export instead do other stuff
    }