@Override
    public WriteCellData<?> convertToExcelData(BigInteger value, ExcelContentProperty contentProperty,
                                               GlobalConfiguration globalConfiguration) {
        return NumberUtils.formatToCellData(value, contentProperty);
    }
BigInteger and number converter

@author Jiaju Zhuang
fastexcel-core/src/main/java/cn/idev/excel/converters/biginteger/BigIntegerNumberConverter.java