金额转英文_金额转英文js

/**
 * 金额转英文
 */
public class MoneyUtil {
    public static String parse(String str) {
        int z = str.indexOf("."); // 取小数点位置
        String lstr = "", rstr = "";
        if (z > -1) { // 看是否有小数，如果有，则分别取左边和右边
            lstr = str.substring(0, z);
            rstr = str.substring(z + 1);
        } else // 否则就是全部
            lstr = str;

        String lstrrev = reverse(lstr); //对左边的字串取反
        String[] a = new String[5]; // 定义5个字串变量来存放解析出来的叁位一组的字串

        switch (lstrrev.length() % 3) {
            case 1:
                lstrrev += "00";
                break;
            case 2:
                lstrrev += "0";
                break;
        }
        String lm = ""; // 用来存放转换後的整数部分
        for (int i = 0; i < lstrrev.length() / 3; i++) {
            a[i] = reverse(lstrrev.substring(3 * i, 3 * i + 3)); // 截取第一个叁位
            // 用来避免这种情况：1000000 = one million thousand only
            if (!a[i].equals("000")) {
                if (i != 0)
                    lm = transThree(a[i]) + " " + parseMore(String.valueOf(i)) + " " + lm; // 加: thousand、million、billion
                else lm = transThree(a[i]); // 防止i=0时， 在多加两个空格.
            } else lm += transThree(a[i]);
        }

        String xs = ""; // 用来存放转换後小数部分
        if (z > -1) xs = "AND CENTS " + transTwo(rstr) + " "; // 小数部分存在时转换小数

        return lm.trim() + " " + xs + "ONLY";
    }

    private static String parseFirst(String str) {
        String[] a = new String[]{"", "ONE", "TWO", "THREE", "FOUR", "FIVE", "SIX", "SEVEN", "EIGHT", "NINE"};
        return a[Integer.parseInt(str.substring(str.length() - 1))];
    }

    private static String parseTeen(String str) {
        String[] a = new String[]{"TEN", "ELEVEN", "TWELEVE", "THIRTEEN", "FOURTEEN", "FIFTEEN", "SIXTEEN", "SEVENTEEN", "EIGHTEEN", "NINETEEN"};
        return a[Integer.parseInt(str) - 10];
    }

    private static String parseTen(String str) {
        String[] a = new String[]{"TEN", "TWENTY", "THIRTY", "FORTY", "FIFTY", "SIXTY", "SEVENTY", "EIGHTY", "NINETY"};
        return a[Integer.parseInt(str.substring(0, 1)) - 1];
    }

    // 两位
    private static String transTwo(String str) {
        String value = "";
        // 判断位数
        if (str.length() > 2) {
            str = str.substring(0, 2);
        } else if (str.length() < 2) {
            str = "0" + str;
        }
        if(str.startsWith("0")){ // 07 - seven 是否小於10
            value = parseFirst(str);
        }else if(str.startsWith("1")){ // 17 seventeen 是否在10和20之间
            value = parseTeen(str);
        }else if (str.endsWith("0")) { // 是否在10与100之间的能被10整除的数
            value = parseTen(str);
        }else {
            value = parseTen(str) + " " + parseFirst(str);
        }
        return value;
    }

    private static String parseMore(String str) {
        String[] a = new String[] { "", "THOUSAND", "MILLION", "BILLION" };
        return a[Integer.parseInt(str)];
    }

    // 制作叁位的数
    private static String transThree(String str) {
        String value = "";
        if (str.startsWith("0")) { // 是否小於100
            value = transTwo(str.substring(1));
        }else if (str.substring(1).equals("00")) { // 是否被100整除
            value = parseFirst(str.substring(0, 1)) + " HUNDRED";
        }else{
            value = parseFirst(str.substring(0, 1)) + " HUNDRED AND " + transTwo(str.substring(1));
        }
        return value;
    }

    private static String reverse(String str) {
        char[] aChr = str.toCharArray();
        StringBuffer tmp = new StringBuffer();
        for (int i = aChr.length - 1; i >= 0; i--) {
            tmp.append(aChr[i]);
        }
        return tmp.toString();
    }

}