java 数字转字符串

package com.micro.admin;

import java.util.ArrayList;
import java.util.List;


public class Test{


    public static void main(String[] args) {
        System.out.println(num2String("100101"));
    }



    public static String num2String(String string) {

        String[] s1 = { "零", "一", "二", "三", "四", "五", "六", "七", "八", "九" };
        String[] s2 = {"", "十", "百", "千", "万", "十", "百", "千", "亿", "十", "百", "千", "万亿" , "十", "百", "千"};


        StringBuffer sb=new StringBuffer(string);
        string = sb.reverse().toString();
        String result = "";
        int n = string.length();
        for(int i=0;i<n;i++){
            int num = string.charAt(i) - '0';
            if(num==0 && i%4!=0){
                result=s1[num]+result;
            }else {
                result = s1[num] + s2[i]+result;
            }
        }


        result = result.replaceAll("一十","十");
        result = result.replaceAll("零+","零");
        result = result.replaceAll("零万","万");
        result = result.replaceAll("零亿","亿");
        result = result.replaceAll("亿亿","亿");
        result = result.replaceAll("亿万","亿");
        result = result.replaceAll("零$","");
        return result;
    }

}