JAVA----数字金额大写转换

public class NumUtils {

    public static String digitUppercase(double n)
    {
        String[] fraction = { "角", "分" };
        String[] digit = { "零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖" };
        String[][] unit = { { "元", "万", "亿" }, { "", "拾", "佰", "仟" } };

        String head = n < 0 ? "负" : "";
        n = Math.abs(n);

        String s = "";
        for (int i = 0; i < fraction.length; i++)
        {
            s += (digit[(int) (Math.floor(n * 10 * Math.pow(10, i)) % 10)] + fraction[i]).replaceAll("(零.)+", "");
        }
        if (s.length() < 1)
        {
            s = "整";
        }
        int integerPart = (int) Math.floor(n);

        for (int i = 0; i < unit[0].length && integerPart > 0; i++)
        {
            String p = "";
            for (int j = 0; j < unit[1].length && n > 0; j++)
            {
                p = digit[integerPart % 10] + unit[1][j] + p;
                integerPart = integerPart / 10;
            }
            s = p.replaceAll("(零.)*零$", "").replaceAll("^$", "零") + unit[0][i] + s;
        }
        
        return head + s.replaceAll("(零.)*零元", "元").replaceFirst("(零.)+", "").replaceAll("(零.)+", "零").replaceAll("^整$", "零元整");
    }
}

digitUppercase(1011);
壹仟壹拾壹元整