public static BigDecimal parseBigDecimal(String string, ExcelContentProperty contentProperty)
        throws ParseException {
        if (!hasFormat(contentProperty)) {
            return new BigDecimal(string);
        }
        return new BigDecimal(parse(string, contentProperty).toString());
    }
parse

@param string
@param contentProperty
@return
fastexcel-core/src/main/java/cn/idev/excel/util/NumberUtils.java