Non-terminating decimal expansion; no exact representable decimal result.

Non-terminating decimal expansion; no exact representable decimal result.

这个错误一般出现在BigDecimal的除法运算中，如：

//不做小数位数处理
BigDecimal per = increse.divide(lastCurMonth)
//保留4位小数

BigDecimal per = increse.divide(lastCurMonth,4)