easy poi 双行标题导出

        List<ExcelExportEntity> entityList = new ArrayList<ExcelExportEntity>();
        entityList.add(new ExcelExportEntity("姓名","studentName",20));
        entityList.add(new ExcelExportEntity("班级", "className",20));
        Integer index = 1;

        for(int i=0;i<shareNames.length;i++) {
            ExcelExportEntity excelExportEntity = new ExcelExportEntity();
            excelExportEntity.setName(shareNames[i]);
            excelExportEntity.setKey(shareNames[i]);
            List<ExcelExportEntity> subEntityList = new ArrayList<ExcelExportEntity>();
            for(int j=0;j<5;j++){
                ExcelExportEntity subExcelExortEntity = new ExcelExportEntity();
                subExcelExortEntity.setKey(nameMap.get(j));
                subExcelExortEntity.setName(nameMap.get(j));
                subExcelExortEntity.setWidth(20);
                if (j == 3) {
                    subExcelExortEntity.setColumnHidden(!org.springframework.util.StringUtils.isEmpty(request.getDataString("shareMonthEnd")));
                }
                subEntityList.add(subExcelExortEntity);
            }
            excelExportEntity.setList(subEntityList);
            entityList.add(excelExportEntity);
        }