sheet.setColumnWidth((short) 10, (short) 5000);
sheet.setColumnWidth((short) 11, (short) 5000);
sheet.setColumnWidth((short) 12, (short) 5000);
// --------- En-tête -----------
HSSFFont font = wb.createFont();
font.setFontHeightInPoints((short) 18);
font.setFontName("Arial");
HSSFCellStyle style = wb.createCellStyle();
style.setFont(font);