Why i got the warning:A record that has been repaired: The format of the /xl/styles.xml part (style)

[lswx2016]

When i exported the xlsx file and opened it,Excel reminds me found the error and need to recover it.

Then the file could be opened,but got the warning.

The infmation is: A repaired record  : The format of the /xl/styles.xml part (style)

The Code pasted below:

public void generateReportEXCEL (List<JasperPrint> jasperPrintList,String[] names, HttpServletRequest req, HttpServletResponse resp) throws IOException, JRException {

resp.reset();

resp.resetBuffer();

resp.setContentType("application/vnd.ms-excel");

resp.setHeader("Content-Disposition", "attachment;filename="test.xlsx"");

ServletOutputStream outputStream = resp.getOutputStream();

 

JRXlsxExporter exporter = new JRXlsxExporter();

exporter.setExporterInput(SimpleExporterInput.getInstance(jasperPrintList));

exporter.setExporterOutput(new SimpleOutputStreamExporterOutput(outputStream));

SimpleXlsxReportConfiguration configuration = new SimpleXlsxReportConfiguration(); 

configuration.setDetectCellType(true);//Set configuration as you like it!!

configuration.setCollapseRowSpan(false);

configuration.setWhitePageBackground(false);

configuration.setSheetNames(names);

 

 

exporter.setConfiguration(configuration);

 

exporter.exportReport();

outputStream.flush();

outputStream.close();

}