Spreadsheet spreadsheet =
getStatisticsFromShiftDistribution(fileBean.getDistribution(), fileBean.getAbstractStudentNumbers());
response.setHeader("Content-Disposition", "attachment; filename=estatisticas_distribuicao" + new DateTime() + ".csv");
final ServletOutputStream writer = response.getOutputStream();
spreadsheet.exportToCSV(writer, COLUMN_SEPARATOR, LINE_SEPARATOR);
writer.flush();
response.flushBuffer();
return null;
}