my jasper report viewer is generating blank pdf output

[ys reddy]

Hi,

I am using the below code to display the jasper report from my servlet. I am getting the blank pdf output. I have created this report using JasperStudio and able to run this report within studio. please help me.

        FileInputStream fis = new FileInputStream("D:\\Tomcat10\\webapps\\tester\\reports\\test.jasper");
        Class.forName("com.mysql.jdbc.Driver");
        Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/tester?user=test&password=test123");
        JasperReport jasperReport = (JasperReport) JRLoader.loadObject(fis);
        JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, null, connection);
        JasperViewer.viewReport(jasperPrint,false);
        fis.close();

Thanks in advance.

[Gader Tomn]

It seems like the issue might be with the file path or the report parameters. Double-check the file path and ensure the database connection is valid. Also, try passing parameters to fillReport if required.

[ys reddy]

Thanks. I have checked the dbconnection and parameters. Report is working fine within jasper studio on same computer (I am using one development computer for all webserver, dbserver and jasper studio). I have added jasperreports, itext and commons jar files into lib folder and classpath.

[Tim Moores]

I don't see any code that would write anything to a PDF file, or the servlet output.

As an aside, the Class.forName call hasn't been necessary for at least a decade.