数字转换成中文汉字数字

class Student {
    static String[] ss = new String[]{"零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"};
    static String[] mm = new String[]{"仟", "佰", "拾", ""};
    static String[] hh = new String[]{"", "萬", "亿", "兆","京","垓"};

    int dd = 123456789;

    public static void main(String[] args) {
        read("22222222222222222222222");
    }

    private static void read(String num) {
        String[] strings = num.split("\.");
        String integer = strings[0];
        String zhengs =readInteger(integer);
        String xiaos="";
        if(strings.length==2){
            String decimal = strings[1];
             xiaos="点"+readDecimal(decimal);
        }
        String xx=zhengs+xiaos;
        System.out.println(xx);
    }

    private static String readInteger(String integer) {
        int mark = integer.length();
        int star = mark - 4 < 0 ? 0 : mark - 4;
        int end = mark;
        StringBuilder stringBuilder = new StringBuilder();
        for (int i = 0; i <= integer.length() / 4; i++) {
            String nn = integer.substring(star, end);
            mark=star;
            star = mark - 4 < 0 ? 0 : mark - 4;
            end = mark;
            String nn1 = readfour(nn);
            if (!nn1.equals("")) {
                stringBuilder = stringBuilder.insert(0,nn1 + hh[i]);
            }

        }
        if(stringBuilder.charAt(0) == '零'){
            stringBuilder.replace(0, 1, "");
        }
        return stringBuilder.toString();
    }

    private static String readDecimal(String decimal) {
        StringBuilder stringBuilder = new StringBuilder();
        for (int i = 0; i < decimal.length(); i++) {
            stringBuilder.append(ss[Integer.parseInt(decimal.charAt(i) + "")]);
        }
        return stringBuilder.toString();
    }

    private static String readfour(String nn) {
        StringBuilder stringBuilder = new StringBuilder();
        int d=4-nn.length();
        if(d!=0){
            for (int i = 0; i <d ; i++) {
                nn="0"+nn;
            }
        }
        for (int i = 0; i < nn.length(); i++) {
            if (nn.charAt(i) == '0') {
                stringBuilder.append(ss[Integer.parseInt(nn.charAt(i) + "")]);
            } else
                stringBuilder.append(ss[Integer.parseInt(nn.charAt(i) + "")] + mm[i]);
        }

        //多个零变一个零
        for (int i = 0; i < stringBuilder.length(); i++) {
            if (stringBuilder.charAt(i) == '零') {
                if((i+1)==stringBuilder.length())
                    continue;
                if (stringBuilder.charAt(i + 1) == '零') {
                    stringBuilder.replace(i + 1, i + 2, "");
                    i=i-1;
                }
            }
        }
        //去掉末尾的零
        if (stringBuilder.charAt(stringBuilder.length() - 1) == '零') {
            stringBuilder.replace(stringBuilder.length() - 1, stringBuilder.length(), "");
        }

        return stringBuilder.toString();
    }


}