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    <p>I'd recommend using the JDBC connection option when generating a complex report, if only for the flexibility gained by writing the SQL directly. But having a JDBC connection trespassing in your view layer does not sound good, so without knowing much about Spring, I say move the actual report generation down to the service layer having it return the JasperPrint object (which is serializable) to the view layer where it can be presented.</p> <p>Here is a plain-vanilla RMI example, pretty much the way I do it. I suppose this can be translated into a Spring bean of some sort.</p> <pre><code>public interface ReportService extends Remote { public JasperPrint fillReport(final JasperReport report, final Map reportParameters)throws RemoteException, JRException; } public class ReportServiceImpl implements ReportService { final Connection connection; public ReportServiceImpl(final Connection connection) { this.connection = connection; } public JasperPrint fillReport(final JasperReport report, final Map reportParameters) throws RemoteException, JRException { return JasperFillManager.fillReport(report, reportParameters, connection); } } </code></pre> <p>One modification that springs to mind, no pun intended, would be to have the fillReport method take a report name or path as an argument instead of the actual JasperReport object and have the service layer load it (and cache it, since loading the report is a relatively expensive operation).</p> <p>Let me know if you want me to flesh out some parts of this example, I must warn you though that I am a Desktop/Swing programmer with only a rudimentary experience in web front-ends.</p>
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    1. COThank you for your opinion it's very important, i agree that passing the Connection object to the view layer its is a very bad idea it sounds much better to generate the report in the service layer. I will be very grateful if you can provide me those examples. thank you.
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    2. COi forgot to write my e mail this is ojvm24 at gmail dot com
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    3. CORight now i'm passin the connection to the view layer, but i'll try your solution, thank you.
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