转换double为百分数，保留小数

    @Test
    public void date20220328(){
        NumberFormat nf = NumberFormat.getPercentInstance();
        nf.setMaximumFractionDigits(1);
        nf.setMinimumFractionDigits(1);
        System.out.println(nf.format(0.248106002318448));
    }

24.8%