Question

dart如何在帮助下实现Java

BigDecimal b7= b6.multiply(new BigDecimal("0.01")).setScale(2,BigDecimal.ROUND_UP);

将0.052设置为0.06

Answer 1

如何使用decimal dart package：

import 'package:decimal/decimal.dart';
import 'dart:math';

Decimal setScale(Decimal decimal, int scale, Decimal roundMethod(Decimal decimal)) {
  Decimal scaleVal = Decimal.fromInt(pow(10, scale));
  return roundMethod(decimal * scaleVal) / scaleVal;
}

Decimal setScaleRoundDown(Decimal decimal, int scale) => setScale(decimal, scale, (val) => val.floor());
Decimal setScaleRoundUp(Decimal decimal, int scale) => setScale(decimal, scale, (val) => val.ceil());
Decimal setScaleRound(Decimal decimal, int scale) => setScale(decimal, scale, (val) => val.round());

void main() {
  print(setScaleRound(Decimal.parse('0.052'), 2));      // 0.05
  print(setScaleRoundUp(Decimal.parse('0.052'), 2));    // 0.06
  print(setScaleRoundDown(Decimal.parse('0.052'), 2));  // 0.05
}

飞镖格式0.052至0.06

1 个答案: