bigdecimal除法保留两位小数四舍五入(bigdecimal除法保留两位)

    public static void main(String[] args) {
        BigDecimal three = new BigDecimal(3);
        BigDecimal one = new BigDecimal(1);
        System.out.println(one.divide(three));
    }

运行代码,报错如下:

Exception in thread "main" java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result.
	at java.math.BigDecimal.divide(BigDecimal.java:1690)
	at Test01.main(Test01.java:10)

解决方法:

转成double浮点数进行运算,如下:

    public static void main(String[] args) {
        BigDecimal three = new BigDecimal(3);
        BigDecimal one = new BigDecimal(1);
        System.out.println(one.doublevalue()/three.doublevalue());
    }

使用BigDecimal指定保留的小数位数

    public static void main(String[] args) {
        BigDecimal three = new BigDecimal(3);
        BigDecimal one = new BigDecimal(1);
        System.out.println(one.divide(three, 2, RoundingMode.HALF_UP));
    }