数字转成大写

1,本程序是一个关于数字转化成大写的小程序,支持小数,例如:123 一百二十三,56.78 五十六点七八
2,目前支持的最大位数到兆为止,请看程序

/**
 * 
 */
package com.img.collection;

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

/**
 * change the number from lower to upper(e.g.1:壹)
 * 
 * @author Bruce
 * @date Sep 24, 2011
 * @version
 */
public class UpperCaseCharacter {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String str = null;
		while (true) {
			System.out.println("Type number:");
			str = sc.next();
			if (!str.matches("\\d+\\.?\\d*")) {
				System.out.println("Type format is invalid");
				continue;
			}

			String[] numInfo = str.split("\\.");
			if (!str.matches("\\d+\\.\\d*")) {
				System.out.println(parser(numInfo[0]));

			} else {
				String before = numInfo[0];
				String tail = numInfo[1];
				System.out.println(parser(before, tail));
			}
			break;
		}

	}

	/**
	 * TODO
	 * 
	 * @param before
	 * @param tail
	 */
	private static String parser(String before, String tail) {
		String start = parser(before);
		int length = tail.length();
		StringBuilder sb = new StringBuilder();
		String end = null;
		for (int i = 0; i < length; i++) {
			char ch = tail.charAt(i);
			sb.append(convertNum(ch));
		}
		end = sb.toString();
		return start + "点" + end;

	}

	private static String convertNum(char c) {
		switch (c) {
		case '0':
			return "零";
		case '1':
			return "壹";
		case '2':
			return "贰";
		case '3':
			return "叁";
		case '4':
			return "肆";
		case '5':
			return "五";
		case '6':
			return "六";
		case '7':
			return "七";
		case '8':
			return "八";
		case '9':
			return "玖";
		default:
			break;

		}
		return null;

	}

	private static String convert(int c) {
		switch (c) {// 亿，千(万)，百(万)， 十(万)， 万，千，百，十, 897654
		case 1:
			return "十";
		case 2:
			return "百";
		case 3:
			return "千";
		case 4:
			return "万";
		case 5:
			return "十";
		case 6:
			return "百";
		case 7:
			return "千";
		case 8:
			return "亿";
		case 9:
			return "十";
		case 10:
			return "百";
		case 11:
			return "千";
		case 12:
			return "万";
		case 13:
			return "兆";
		default:
			break;

		}
		return null;
	}

	/**
	 * TODO
	 * 
	 * @param str
	 * @return
	 */
	private static String parser(String str) {
		int length = str.length();

		StringBuilder sb = new StringBuilder();

		for (int i = 0; i < length; i++) {
			char ch = str.charAt(i);
			sb.append(convertNum(ch));
			if (length - 1 - i != 0) {
				sb.append(convert(length - 1 - i));
			}

		}
		return sb.toString();

	}// 909878.

}// 亿，千(万)，百(万)， 十(万)， 万，千，百，十, 897654