JAVA把阿拉伯數字金額轉換為中文漢字金額

package util;

/**
 * 輸入的金額轉換成中文大寫，16位數字精確到小數點后2位數
 *
 */
public class MoneyToCNFormat {
    private static final String[] CN_NUMBERS = { "零", "壹", "貳", "叄", "肆", "伍", "陸", "柒", "捌", "玖" };
    private static final String[] CN_MONETETARY_UNIT = { "分", "角", "元", "拾", "佰", "仟", "萬", "拾", "佰", "仟", "億", "拾",
            "佰", "仟", "兆", "拾", "佰", "仟" };
    private static final String CN_FULL = "整";
    private static final String CN_NEGATIVE = "負";
    private static final String CN_ZERO = "零角零分";
    private static final long MAX_NUMBER = 10000000000000000l;// 最大16位整數
    private static final String INVALID_AMOUNT = "金額超出最大金額千兆億(16位整數)";

    public static String formatToCN(double amount) {
        if (Math.abs(amount) >= MAX_NUMBER)
            return INVALID_AMOUNT;
        StringBuilder result = new StringBuilder();
        long value = Math.abs(Math.round(amount * 100));
        int i = 0;
        while (true) {
            int temp = (int) (value % 10);
            result.insert(0, CN_MONETETARY_UNIT[i]);
            result.insert(0, CN_NUMBERS[temp]);
            value = value / 10;
            if (value < 1)
                break;
            i++;
        }
        // "零角零分" 轉換成 "整"
        int index = result.indexOf(CN_ZERO);
        if (index > -1) {
            result.replace(index, index + 4, CN_FULL);
        }
        // 負數
        if (amount < 0) {
            result.insert(0, CN_NEGATIVE);
        }
        return result.toString();
    }

    /**
     * 測試
     * 
     * @param args
     */
    public static void main(String[] args) {
        double amountTest = 987654321654321.12d;
        System.out.println("金額[" + amountTest + "]=" + formatToCN(amountTest));

        int amountTest2 = 98;
        System.out.println("金額[" + amountTest2 + "]=" + formatToCN(amountTest2));
    }

}