@Override
    public BigInteger convertToJavaData(ReadCellData<?> cellData, ExcelContentProperty contentProperty,
                                        GlobalConfiguration globalConfiguration) {
        if (cellData.getBooleanValue()) {
            return BigInteger.ONE;
        }
        return BigInteger.ZERO;
    }
BigInteger and boolean converter

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