@Override
  public ModelAndView getReportTemplate() {
    List<MonthlyTraffic> monthlyTrafficReports = monthlyTraffictDAO.getMonthlyTraffic(monthDate);
    HSSFWorkbook workbook = new HSSFWorkbook();
    HSSFSheet sheet = workbook.createSheet("Monthly Traffic Report");

    int rownum = 0;
    Row row0 = sheet.createRow(rownum++);

    row0.createCell(0).setCellValue("Source Country");
    row0.createCell(1).setCellValue("Service");
    row0.createCell(2).setCellValue("Destination Country");
    row0.createCell(3).setCellValue("Total Call Minutes");

    for (MonthlyTraffic mt : monthlyTrafficReports) {
      Row row = sheet.createRow(rownum++);
      row.createCell(0).setCellValue(mt.getFromCountry());
      row.createCell(1).setCellValue(mt.getServiceName());
      row.createCell(2).setCellValue(mt.getToCountry());
      row.createCell(3).setCellValue(mt.getMinutesOfCalls());
    }

    Map<String, HSSFWorkbook> parameterMap = new HashMap<String, HSSFWorkbook>();
    parameterMap.put("excelBook", workbook);
    ModelAndView modelAndView = new ModelAndView();
    modelAndView.addAllObjects(parameterMap);
    return modelAndView;
  }
 public List<MonthlyTraffic> getAllMonthlyTraffic(Date dateforMonth) {
   return monthlyTrafficDao.getMonthlyTraffic(dateforMonth);
 }