JasperReports: How to call the report in jsp page

Question

I made one jasper report using iReport 3.7.4 version, now i have to use that or call that report in my java application where i am using servlets, jsp and struts framework, apache tomcat as server.

I want steps regarding how to call the jasper report with some example.

Answer 1

1. Compile the report in iReport
2. Place the compiled report on the classpath

3. load it with

   JasperReport jasperReport = (JasperReport) JRLoader.loadObject(inputStream);
   

4. Fill it with data. dataSource is the DataSource instance you have - for example a BeanCollectionDataSource

   JasperPrint jasperPrint = 
        JasperFillManager.fillReport(jasperReport, params, dataSource);
   

5. Export it

   JRPdfExporter exporter = new JRPdfExporter();
   exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, outputStream);
   exporter.exportReport();
   

6. The outputStream above may be either a response.getOutputStream() or a FileOutputStream(), depending on whether you want to send it to a client or you want to store it as a file. If you want to send it to the client, you'd have to send the Content-Disposition header, and some more, but that depends on the format you want to save to. In case you want to print on the client, it's quite a different question - you'd need some client-side code, an applet, for example.

Answer 2

After 6 years @Bozho answer now (v5 and v6) contains deprecated code on point 5 JRExporterParameter.OUTPUT_STREAM, but I will try to improve the other points while I'm at it

3. Load the report
   
   compiled version .jasper

   JasperReport jasperReport = (JasperReport) JRLoader.loadObject(inputStream);
   

   or the non compiled version .jrxml (slower since need to compile but feasible)

   JasperReport jasperReport = JasperCompileManager.compileReport("path/to/myReport.jrxml");
   

4. Fill the report
   
   with nothing (datasource generated inside report or just static text)

   JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, params);
   

   with datasource:

   JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, params, dataSource);
   

   with database connection (may the most common, sql executed inside report)

   JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, params, connection);
   

5. Export report
   
   

   JRPdfExporter exporter = new JRPdfExporter()
   exporter.setExporterInput(new SimpleExporterInput(jasperPrint));
   exporter.setExporterOutput(new SimpleOutputStreamExporterOutput(outputStream));
   SimplePdfExporterConfiguration configuration = new SimplePdfExporterConfiguration();
   configuration.setMetadataAuthor("Petter"); //Set your pdf configurations, 
   exporter.setConfiguration(configuration);
   exporter.exportReport();
   

6. If you like to stream the report directly to web page this is how contentType and Content-disposition is set and how you retrieve the outputStream
   
   

   response.setContentType("application/x-pdf");
   response.setHeader("Content-disposition", "inline; filename=myReport.pdf");
   OutputStream outputStream = response.getOutputStream();