JRXhtmlExporter exporter = new JRXhtmlExporter();
exporter.setParameter(JRExporterParameter.JASPER_PRINT_LIST, jasperPrintList);
exporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME, "build/reports/BatchExportReport.xhtml");
exporter.exportReport();
System.err.println("XHTML creation time : " + (System.currentTimeMillis() - start));
}