//if(exporter == null) exporter = new JRXlsExporter();
if(exporter == null) exporter = new JExcelApiExporter();
} else if (outputType.equalsIgnoreCase("rtf")) {
if(mimeType == null) mimeType = "application/rtf";
servletResponse.setContentType(mimeType);
if(exporter == null) exporter = new JRRtfExporter();
} else if (outputType.equalsIgnoreCase("xml")) {
if(mimeType == null) mimeType = "text/xml";
servletResponse.setContentType(mimeType);
if(exporter == null) exporter = new JRXmlExporter();
} else if (outputType.equalsIgnoreCase("txt")) {