public void jxl() throws JRException
{
long start = System.currentTimeMillis();
File sourceFile = new File("build/reports/DataSourceReport.jrprint");
JasperPrint jasperPrint = (JasperPrint)JRLoader.loadObject(sourceFile);
File destFile = new File(sourceFile.getParent(), jasperPrint.getName() + ".jxl.xls");
JExcelApiExporter exporter = new JExcelApiExporter();
exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
exporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME, destFile.toString());