java - Calling stored procedure from web app Jasper report returns no data -

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i have jasper report called web app , executes stored procedure data. stored procedure works on sql developer , ireports studio (5.1) after building , deploying, returns blank pdf when call report jsp front end.

the log files indicate parameters correctly sent, there no data jasper library's jrverticalfiller class. 

conn  = datasource.getconnection();  parameters.put("report_connection", conn); parameters.put("subreport_dir", propsutil.getreportsrootpath());  jasperprint jasperprint = jasperfillmanager.fillreport(jasperreport, parameters, conn);  jrpdfexporter jrpdfexporter = new jrpdfexporter();  jrpdfexporter.setparameter(jrexporterparameter.jasper_print, jasperprint); //etc ...  jrpdfexporter.exportreport();

any advice appreciated.

i found cause of problem. parameter names defined in stored procedure, jrxml, , parameter names in java class, have same. in case, java class used min_date , max_date while storedproc , jrxml used mindate , maxdate.

no wonder data wasn't being returned!


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