BigDecimal如何相除并保留小数后两位

 
    public static void main(String[] args) {
        long aa = System.currentTimeMillis();
//        System.out.println(aa);
        BigDecimal a = new BigDecimal(115);
        BigDecimal b = new BigDecimal(22);
        BigDecimal bigDecimal = a.divide(b).setScale(2, RoundingMode.HALF_UP);
        System.out.println(bigDecimal);
        long bb = System.currentTimeMillis();
        System.out.println(bb-aa);
    }