@Override
    public WriteCellData<?> convertToExcelData(BigInteger value, ExcelContentProperty contentProperty,
                                               GlobalConfiguration globalConfiguration) {
        if (BigInteger.ONE.equals(value)) {
            return new WriteCellData<>(Boolean.TRUE);
        }
        return new WriteCellData<>(Boolean.FALSE);
    }
BigInteger and boolean converter

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