public  static void setRegionStyle(HSSFSheet sheet, CellRangeAddress region )
    {
      
        int rowFrom = region.getFirstRow();
        int rowTo = region.getLastRow();
        int colFrom = region.getFirstColumn();
        int colTo = region.getLastColumn();
        for (int i = rowFrom; i <= rowTo; i ++)
        {
            HSSFRow row = HSSFCellUtil.getRow(i, sheet);

            for (int j = colFrom; j <= colTo; j++)
            {
                HSSFCell cell = HSSFCellUtil.getCell(row, (short)j);
                
                if(j == colFrom&&i==rowFrom)
                {
                  cell.setCellStyle(StyleUtil.getDefaultStyle(sheet.getWorkbook(),cell.getCellStyle()));
                }else{
                     HSSFCellStyle cellStyle =   sheet.getWorkbook().createCellStyle();
                     cellStyle = getDefaultStyle(sheet.getWorkbook(),cellStyle) ;
                     cell.setCellStyle(cellStyle);
                }

            }
        }
    }