JAVA元转换成分

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代码如下：

    /**
     *
     * 将元为单位的转换为分 （乘100）
     *
     * @param amount
     * @return
     */
    public static String changeBranch(Long amount) {
        return BigDecimal.valueOf(amount).multiply(new BigDecimal(100)).toString();
    }

    /**
     * 将元为单位的转换为分 替换小数点，支持以逗号区分的金额
     *
     * @param amount
     * @return
     */
    public static String changeBranch(String amount) {
        String currency = amount.replaceAll("\\$|\\￥|\\,", ""); // 处理包含, ￥
        // 或者$的金额
        int index = currency.indexOf(".");
        int length = currency.length();
        Long amLong;
        if (index == -1) {
            amLong = Long.valueOf(currency + "00");
        } else if (length - index >= 3) {
            amLong = Long.valueOf((currency.substring(0, index + 3)).replace(".", ""));
        } else if (length - index == 2) {
            amLong = Long.valueOf((currency.substring(0, index + 2)).replace(".", "") + 0);
        } else {
            amLong = Long.valueOf((currency.substring(0, index + 1)).replace(".", "") + "00");
        }
        return amLong.toString();
    }

    public static void main(String[] args) {
        System.out.println("元-分==" + changeBranch("0.01"));
        System.out.println("元-分==" + changeBranch("100"));
        System.out.println("元-分==" + changeBranch((long) 100));
   }