面试题：数字的汉语读音

package interview;

public class taotian {
//数字的汉语读音
//例：
//2136548005
//二十一亿三千六百五十四万八千零五
public static void main(String[] args) {

    String test = test("123012300009");
    System.out.println(test);
}

public static String test(String str) {
    String[] ChineseNum = {"零", "一", "二", "三", "四", "五", "六", "七", "八", "九"};
    String[] ChineseWeiShu = {"十", "百", "千", "万", "亿"};
    char[] charArray = str.toCharArray();
    int temp = charArray.length - 1;
    int weishu = -1;
    StringBuilder result = new StringBuilder();
    while (temp != -1) {
        String s = "";
        char c = charArray[temp];
        if (weishu == -1) {
        } else if (c != '0' || (weishu + 1) % 4 == 0) {
            s = ChineseWeiShu[weishu % 4];
            if ((weishu + 1) / 4 == 2 && (weishu + 1) % 4 == 0) {
                s = ChineseWeiShu[4];
            }
        }

        result.append(s);
        String tempStr = ChineseNum[c - '0'];
        //十 百 千 万 亿
        if (tempStr.equals("零") && result.lastIndexOf("零") == result.length() - 1) {
            temp--;
            weishu++;
            continue;
        }
        result.append(tempStr);
        temp--;
        weishu++;
    }
    return result.reverse().toString().replaceAll("零万", "万").replaceAll("零亿", "亿");
}

}