今天使用BigDecimal数据类型做除法的时候，遇到以下报错：
Method threw ‘java.lang.ArithmeticException’ exception.
Non-terminating decimal expansion; no exact representable decimal result.
经过排查发现是当不整除，出现无限循环小数时，就会抛异常的。
比如10/3 =3.33333… 就会出现异常
解决办法：
1.设置精度
具体代码如下：
new BigDecimal(10).divide(new BigDecimal(3),2,BigDecimal.ROUND_HALF_UP));
源码如下：
1 public BigDecimal divide(BigDecimal divisor, int scale, int roundingMode) {
2 if (roundingMode < ROUND_UP || roundingMode > ROUND_UNNECESSARY)
3 throw new IllegalArgumentException("Invalid rounding mode");
4 if (this.intCompact != INFLATED) {
5 if ((divisor.intCompact != INFLATED)) {
6 return divide(this.intCompact, this.scale, divisor.intCompact, divisor.scale, scale, roundingMode);
7 } else {
8 return divide(this.intCompact, this.scale, divisor.intVal, divisor.scale, scale, roundingMode);
9 }
10 } else {
11 if ((divisor.intCompact != INFLATED)) {
12 return divide(this.intVal, this.scale, divisor.intCompact, divisor.scale, scale, roundingMode);
13 } else {
14 return divide(this.intVal, this.scale, divisor.intVal, divisor.scale, scale, roundingMode);
15 }
16 }
17 }
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原文链接：https://blog.csdn.net/weixin_42280076/article/details/108082470