Java常用Money轉換方法實現

public class MoneyUtils {
    private static final String UNIT = "萬千佰拾億千佰拾萬千佰拾元角分";
    private static final String DIGIT = "零壹貳叄肆伍陸柒捌玖";
    private static final double MAX_VALUE = 9999999999999.99D;
    /**
    * 將double類型的元轉換成中文格式
    */
    public static String change(double v) {
        if (v < 0 || v > MAX_VALUE) {
            return "參數非法!";
        }
        long l = Math.round(v * 100);
        if (l == 0) {
            return "零元整";
        }
        String strValue = l + "";
        // i用來控制數
        int i = 0;
        // j用來控制單位
        int j = UNIT.length() - strValue.length();
        String rs = "";
        boolean isZero = false;
        for (; i < strValue.length(); i++, j++) {
            char ch = strValue.charAt(i);
            if (ch == '0') {
                isZero = true;
                if (UNIT.charAt(j) == '億' || UNIT.charAt(j) == '萬' || UNIT.charAt(j) == '元') {
                    rs = rs + UNIT.charAt(j);
                    isZero = false;
                }
            } else {
                if (isZero) {
                    rs = rs + "零";
                    isZero = false;
                }
                rs = rs + DIGIT.charAt(ch - '0') + UNIT.charAt(j);
            }
        }
        if (!rs.endsWith("分")) {
            rs = rs + "整";
        }
        rs = rs.replaceAll("億萬", "億");
        return rs;
    }

    /**
     * 將金額分轉換成12,131.23格式的元
     * 1000131 -> 10,001.31
     * 100.31 -> 100.31
     * 12 -> 0.12
     * 100 -> 1
     * 110 -> 1.1
     * 10 -> 0.1
     * 1 -> 0.01
     * 0 -> 0
     * @param amountFen 要轉換的金額 單位爲分
     * @param grouping 是否以 10,001.31形式展示，否 則爲10001.31
     * @param tailTrim 是否去除小數點後的0
     * @return String
     */
    public static String fromFenToYuan(Long amountFen,boolean grouping,boolean tailTrim){
        String pattern = (amountFen == 0L) ? "0.00" : ",##0.00";
        BigDecimal amountYuan = Money.toYuan(amountFen);
        DecimalFormat decimalFormat = new DecimalFormat(pattern);
        String formatString = decimalFormat.format(amountYuan);
        if (!grouping) {
            formatString = formatString.replaceAll(",","");
        }
        if (!tailTrim) {
            return formatString;
        }
        if (".00".equals(formatString.substring(formatString.length() - 3))) {
            return formatString.substring(0,formatString.length() - 3);
        }
        if ("0".equals(formatString.substring(formatString.length() - 1))) {
            return formatString.substring(0,formatString.length() - 1);
        }
        return formatString;
    }
}