数字--英文金额

package com.ext;

import java.util.HashMap;
import java.util.Map;

public class Convert {

	public final String[] units = new String[] { "", "thousand", "million",
			"billion" ,"trillion"};

	public final static Map<Integer, String> map = new HashMap<Integer, String>();

	static {
//		map.put(0,"zero");
		map.put(1, "one");
		map.put(2, "two");
		map.put(3, "three");
		map.put(4, "four");
		map.put(5, "five");
		map.put(6, "six");
		map.put(7, "seven");
		map.put(8, "eight");
		map.put(9, "nine");
		map.put(10, "ten");
		map.put(11, "eleven");
		map.put(12, "twelve");
		map.put(13, "thirteen");
		map.put(14, "fourteen");
		map.put(15, "fifteen");
		map.put(16, "sixteen");
		map.put(17, "seventeen");
		map.put(18, "eighteen");
		map.put(19, "nineteen");
		map.put(20, "twenty");
		map.put(30, "thirty");
		map.put(40, "forty");
		map.put(50, "fifty");
		map.put(60, "sixty");
		map.put(70, "seventy");
		map.put(80, "eighty");
		map.put(90, "ninety");
	}

	public String convert(String number) {
		
		if(null== number || "".equals(number)|| "0".equals(number)) {
			return "";
		}
		number = number.replace(",", "");
		int pointPos = number.indexOf(".");

		String num1 = null;
		String num2 = null;

		if (-1 == pointPos) {
			num1 = number;
		} else {
			num1 = number.substring(0, pointPos);
			num2 = number.substring(pointPos + 1);
		}

		int c = (num1.length() + 2) / 3;
		int offset = c * 3 - num1.length();
		int offset_wk = offset;

		while (offset_wk != 0) {
			num1 = "*" + num1;
			offset_wk--;
		}
		
		StringBuffer sb = new StringBuffer();

		for (int i = 0; i < c; i++) {
			String s;
			if (i == c - 1 && offset != 0) {
				s = num1.substring(offset, 3);
			} else {
				s = num1.substring((c - i - 1) * 3, (c - i) * 3);
			}
			sb.insert(0, units[i] + " ").insert(0,
					covertLessThanThousand(s) + " ");
		}
		if(!"".equals(sb.toString().trim())){
			sb.append("dollar ");	
		}
		

		if (null != num2 && Integer.parseInt(num2) != 0) {
			sb.append(covertLessThanThousand(num2)).append(" cent");
		}

		return sb.toString();

	}

	public String covertLessThanThousand(String number) {
		StringBuffer sb = new StringBuffer();

		int iNum = Integer.parseInt(number);
		if (iNum / 100 != 0) {
			sb.append(map.get(iNum / 100)).append(" ").append("hundred").append(" ");
			iNum = iNum % 100;
		}
		if (iNum / 10 != 0 && iNum > 19) {
			sb.append(map.get(iNum - iNum % 10)).append(" ");
			iNum = iNum % 10;
		}
		sb.append(map.get(iNum) == null ? "" : map.get(iNum)).append(" ");

		return sb.toString().trim();

	}

	public static void main(String[] args) {

//		String str = new Convert().convert("55,555,123,456,789.01");
//		String str = new Convert().convert("1.01");
		String str = new Convert().convert("99,999,999,999,999.99");

		System.out.println(str.replaceAll("^[ ]*", ""));
	}

}