数字转成RMI

public class RmbConversion {
  public String Conversion(String str){
    String rmbstr = "";
    //创建单位字符串数组
    String rmbunit[] = {"","圆","拾","佰","仟","萬","亿"};
    //创建中文数字字符串数组
    String rmbnum[] ={"零","壹","贰","叁","肆","伍","陆","柒","捌","玖"};
    //把将要转换的数字的整型部分和小数部分别放在字符串数组中
    String lstr[] =str.split("//.");
    StringBuffer rmbsb = new StringBuffer();
    //拼写整型部分
    for(int i=lstr[0].length();i>0;i--){
      //将一个一的数字分别取出
      int k =Integer.parseInt((lstr[0]).substring((lstr[0].length()-(i-1))-1,lstr[0].length()-(i-1)));
      //转换后并连接
      rmbsb.append(rmbnum[k]);
      //给整型数字添加单位
      if(((i-1)/4)%2==0&&( (i - ( (i - 2) / 4 * 4 + 1))) + 1==5)
  //连接"亿"位
         rmbsb.append(rmbunit[((i-((i-2)/4*4+1)))+2]);
      else
  //连接"圆","拾","佰","仟","萬"位
         rmbsb.append(rmbunit[((i-((i-2)/4*4+1)))+1]);
    }
    //连接小数为数
    rmbsb.append(rmbnum[Integer.parseInt(""+lstr[1].substring(0,1))]);
    rmbsb.append("角");
    rmbsb.append(rmbnum[Integer.parseInt(""+lstr[1].substring(1,2))]);
    rmbsb.append("分");
    rmbstr = rmbsb.toString();
    //去掉在字符串中多余的单位和零
    rmbstr = rmbstr.replaceAll("零([^亿万圆角分])", "零");
    rmbstr = rmbstr.replaceAll("亿零+万","亿零");
    rmbstr = rmbstr.replaceAll("零+", "零");
    rmbstr = rmbstr.replaceAll("零([亿万圆])", "$1");
    rmbstr =rmbstr.replaceAll("^壹拾","拾");
    //返回转换的结果.
    return rmbstr;
  }
  public static void main(String[] args) {
    RMBConversion rmbc = new RMBConversion();
    System.out.println("转换结果为:"+rmbc.Conversion(10000000000000000000001.00+""));
  }
}