学步园

import java.util.Scanner;
import java.util.regex.Pattern;

public class Demo {
	public static String result = "";
	public static boolean a = true;
	public static boolean b = true;

	public static void main(String[] args) {
		String str = "100000";
		str = "1005000";
		str ="10010010";
		str="1003";
		 str="110";
		 str ="10000";
		str ="1000000";
		str = "1000500";
		str = "10100010";
		str="1100010";
		str="101010101";
		str="1005005";
		str="1000500";
		str="10500500";
		System.out.println("请输入一个数字：");
		str = new Scanner(System.in).next();
//		for (int i = 0; i < 999999999; i++) {
//			if(Pattern.matches("^[01]*$",""+i)){
				step(str+"");
				if(b&&result.length()<=3&& result.indexOf("一十")==0){
					System.out.println(result.indexOf("一十")+"^^");
					result = result.replace("一十","十");
				}
				result +="*****";
				System.out.println(result);
				result="";
				a=true;
				b=true;
//			}
//		}		

	}

	public static void step(String str) {
		if (str.length() > 8) {
			addNumber(str.substring(0, 1));
			result += "亿";
			b = false;
			step(str.substring(1));
		} else if (str.length() > 4) {
			addUnit1(str.substring(0, str.length() - 4));
			b = false;
			step(str.substring(str.length() - 4));
		} else if(str.length()>0){
			addUnit2(str);
		}
	}

	public static void addNumber(String str) {
		int temp = Integer.parseInt(str);
		switch (temp) {
		case 0:
			if (a) {
				result += "零";
				a = false;
				return;
			}
			a = false;
			return;
		case 1:
			result += "一";
			break;
		case 2:
			result += "二";
			break;
		case 3:
			result += "三";
			break;
		case 4:
			result += "四";
			break;
		case 5:
			result += "五";
			break;
		case 6:
			result += "六";
			break;
		case 7:
			result += "七";
			break;
		case 8:
			result += "八";
			break;
		case 9:
			result += "九";
			break;
		default:
			break;
		}
		a = true;
	}

	public static void addUnit1(String str) {
		for (int i = 0; i < str.length(); i++) {
			if (isFourZero(str.substring(i))&&result.length()>0&&!result.substring(result.length()-1).equals("亿")) {
				result += "万";
				result+="零";
				a=false;
				return;
			}
			String ch = str.substring(i, i + 1);
			if (i == 0) {
				a = true;
			}
			addNumber(ch);
			addUnit(a, i, str.length());
		}
		result += "万";
		a = true;
	}

	public static void addUnit2(String str) {
		if (result.length()<=4&&result.length() >= 3
				&& result.indexOf("一十")==0) {
			result = result.replace("一十","十");
		}
		if (isFourZero(str) && b == false) {
			if(result.substring(result.length()-1).equals("零")){
				result = result.substring(0, result.length() - 1);
			}
			return;
		}
		for (int i = 0; i < str.length(); i++) {
			if (isFourZero(str.substring(i))) {
				return;
			}
			String ch = str.substring(i, i + 1);
			addNumber(ch);
			addUnit(a, i, str.length());
		}
	}

	public static void addUnit(boolean n, int index, int length) {
		if (n == false) {
			return;
		}
		switch (index + (4 - length)) {
		case 0:
			result += "千";
			break;
		case 1:
			result += "百";
			break;
		case 2:
			result += "十";
			break;
		case 3:
			result += "";
			break;
		default:
			break;
		}
	}

	public static boolean isFourZero(String str) {
		int count = 0;
		for (int i = 0; i < str.length(); i++) {
			if (str.substring(i, i + 1).equals("0")) {
				count++;
			}
		}
		if (count == str.length()) {
			return true;
		}
		return false;
	}
}