// =================================================================================================================================
  private int exportFrontEquipListReport_header(
      List<FrontEquipListReport_subtype> subtypes, int rownum, XSSFWorkbook wb, Sheet sheet) {
    CellStyle style = getHeaderStyle(wb, (short) 11);
    CellStyle style2 = getHeaderStyle(wb, (short) 10);

    // 第一行列标题
    Row row_subtype = sheet.createRow(rownum++);
    Cell cell_subtype_0 = row_subtype.createCell(0);
    cell_subtype_0.setCellValue("");
    cell_subtype_0.setCellStyle(style);
    sheet.setColumnWidth(0, 700);
    Cell cell_subtype_1 = row_subtype.createCell(1);
    cell_subtype_1.setCellValue("");
    cell_subtype_1.setCellStyle(style);
    sheet.setColumnWidth(1, 1800);
    Cell cell_subtype_2 = row_subtype.createCell(2);
    cell_subtype_2.setCellValue("");
    cell_subtype_2.setCellStyle(style);
    sheet.setColumnWidth(2, 4800);

    // 第二行列标题
    Row row_prod = sheet.createRow(rownum++);
    Cell cell_prod_0 = row_prod.createCell(0);
    cell_prod_0.setCellValue("序号");
    cell_prod_0.setCellStyle(style2);
    Cell cell_prod_1 = row_prod.createCell(1);
    cell_prod_1.setCellValue("点位编号");
    cell_prod_1.setCellStyle(style2);
    Cell cell_prod_2 = row_prod.createCell(2);
    cell_prod_2.setCellValue("点位名称");
    cell_prod_2.setCellStyle(style2);

    int cell_num = 3;
    for (FrontEquipListReport_subtype subtype : subtypes) {
      int start_cell_num = cell_num;
      Cell cell_subtype = row_subtype.createCell(cell_num);
      cell_subtype.setCellValue(subtype.getSubtype_name());
      cell_subtype.setCellStyle(style);

      for (FrontEquipListReport_prod prod : subtype.getProds()) {
        if (start_cell_num != cell_num) {
          cell_subtype = row_subtype.createCell(cell_num);
          cell_subtype.setCellStyle(style);
        }

        Cell cell_prod = row_prod.createCell(cell_num);
        cell_prod.setCellValue(prod.getProd_name() + "(" + prod.getProd_style() + ")");
        cell_prod.setCellStyle(style2);
        cell_num++;
      }
      // 对子类型进行横向的单元格合并
      sheet.addMergedRegion(
          new CellRangeAddress(1, (short) 1, start_cell_num, (short) cell_num - 1));
    }

    return rownum;
  }