[birt-report-engine-dev] get Exception in thread "main" java.lang.NullPo

["Chaohua Wang" <chaohua.wang@xxxxxxxxxxxxxxx>]

Hi, Folks,

 

I can use this MyPage.rptdocument to generate a PDF file. the pdf file is perfect.

When I use IDataExtractionTask to extract data from MyPage.rptdocument, but I got NullPointerException.

 

Please help, Thank you very much.

 

Chaohua

 

IReportDocument iReportDocument = reportEngine.openReportDocument("MyPage.rptdocument");

           

IDataExtractionTask iDataExtract = reportEngine.createDataExtractionTask(iReportDocument);

           

             

  ArrayList resultSetList = (ArrayList)iDataExtract.getResultSetList( );