price(350)*(10/100)
price.multiply(maxPayIntegrateRate.divide(new BigDecimal("100.0"))
maxPayIntegrateRate 是自己定义的比例值 10
multiply *
divide /
BigDecimal 好于 Integer
BigDecimal https://blog.csdn.net/haiyinshushe/article/details/82721234
原文：https://www.cnblogs.com/dianzan/p/11934290.html