JasperReport, show and print report

I exported a .jrprint file created with iReport. Now I want to preview the report and finally print it, how can I do this? I'm trying with:

JRBeanCollectionDataSource ds=new JRBeanCollectionDataSource(list); JasperPrint jrprint=JasperFillManager.fillReport("report.jrprint", null, ds);

But I have this exception

java.lang.ClassCastException: net.sf.jasperreports.engine.JasperPrint cannot be cast to net.sf.jasperreports.engine.JasperReport

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4 Answers 4

You're specifying the JasperPrint file and not the JasperReport file. Let me break down the files and what they are:

report.jrxml - An xml definition of a jasper report - this defines a report, but cannot be used directly to generate output.
report.jasper - A compiled jrxml file (JasperReport). This can be used as input to fill the report with data.
report.jprint - A report that's been filled with data, and is ready to be exported to multiple output formats

Here's some code to start with the jrxml file the designer creates to get you to an printed pdf output:

Connection connection = PersistenceSessionFactory.getSqlSession().getConnection(); JasperReport report = JasperCompileManager.compileReport( "FancyPantsReport.jrxml" ); // setup parameters for use with the report HashMap params = new HashMap(); params.put( "sqlDate", fromDate ); // Fill the report data from the sql connection and parameters JasperPrint printedReport = JasperFillManager.fillReport(report, params, connection); String outputFilename = "FancyPants-" + dateString + ".pdf"; JasperExportManager.exportReportToPdfFile( printedReport, outputFilename ); LOG.info("Report Generated in " + (System.currentTimeMillis() - start) + "ms");

Notice it uses the compile to get a JasperReport from the jrxml, then the FillManager to get a JasperPrint from the JasperReport, and finally exports the JasperPrint to pdf.