ExcelCell titleCell = new ExcelCell();
titleCell.setCellIndex("C1");
titleCell.setDataName("title");
setDefaultStyle(titleCell, TITLE_CELL_INDEX);
headBlock.addCell(titleCell);
for(int i=0; i< tableModel.getColumnNames().length; i++){
ExcelCell labelCell = new ExcelCell();
labelCell.setRow(1);
labelCell.setCol(i+1);
labelCell.setDataName("__column" + (i+1));