/** * 计算两个价钱之差 price - reprice 得到真实价格 *  * @param price * @param reprice * @return BigDecimal : 差值 */private final BigDecimal getRealPrice(BigDecimal price, BigDecimal reprice) {    // 计算实际金额    if (price == null) {        price = new BigDecimal(0);    }    if (reprice == null) {        reprice = new BigDecimal(0);    }    BigDecimal toprice = price.subtract(reprice);    return toprice;}复制代码