中文数字转阿拉伯数字

/**
 *  @author loiy
 *  www.agrilink.cn
 *  2012.11.30   
 */
import java.util.Hashtable;

public class DigitUtil {
	
	/**
	 * 汉字中的数字字符
	 */
	private static final Character[] SCDigits = {'零','一','二','三','四','五','六','七','八','九'};
	
	/**
	 * 阿拉伯数字
	 */
	private static final Character[] araDigits = {'0','1','2','3','4','5','6','7','8','9'};
	
	/**
	 * 阿拉伯数字
	 */
	private static Hashtable<Character, Character> araHash = new Hashtable<Character, Character>();
	
	/**
	 * 阿拉伯数字
	 */
	private static Hashtable<Character, Integer> YWQBSHash = new Hashtable<Character, Integer>();
	
	static {
		for (int i = 0; i < SCDigits.length; i++) {
			araHash.put(SCDigits[i], araDigits[i]);
		}
		YWQBSHash.put('亿', 100000000);
		YWQBSHash.put('万', 10000);
		YWQBSHash.put('千', 1000);
		YWQBSHash.put('百', 100);
		YWQBSHash.put('十', 10);
	}
	
	/**
	 * @param remain 剩下多少个字符
	 * @param curchar 当前分析的字符
	 */
	private static int ywqbs(int num, Boolean bool, int no, int remain, char curchar, char lastshow) {
		if(num == 0) {
			num += no;
			return num;
		} else {
			String numString = String.valueOf(num); // 将num转换成String
			String last = numString.substring(numString.length() - 1, numString.length()); // 获取最后一个字符
			String exceptlast = numString.substring(0, numString.length() - 1); // 获取除了最后一个字符所有字符串
			if(exceptlast.length() == 0) { // 说明num是个位值
				num = Integer.parseInt(last) * no;
				return num;
			} else {
				/***** 针对有连续的这些字符[十百千万亿] start *****/		
				if(bool && YWQBSHash.get(curchar) > YWQBSHash.get(lastshow)) { // 说明上个字符属于[十百千万亿]
					num *= no;
					return num;
				}
				/***** 针对有连续的这些字符[十百千万亿] end *****/
				/***** 分析到最后一个字符 start *****/
				/**** 针对这种情况(一千二百二十一万) ****/
				if(remain == 1 && YWQBSHash.get(curchar) > YWQBSHash.get(lastshow)) {
					num *= YWQBSHash.get(curchar);
					return num;
				}
				/**** 针对这种情况(一千二百二十一万) ****/
				/***** 分析到最后一个字符 end *****/
				/***** last如果为0 start *****/
				if(last.equals("0")) { // 循环到最后一位字符,last等于0
					last = "1"; // 
				}
				/***** last如果为0 end *****/
				exceptlast = exceptlast + "0"; // 缺少最后一位,需要补上
				num = Integer.parseInt(exceptlast) + Integer.parseInt(last) * no;
				return num;
			}
		}
	}
	
	public static int parse(String word) {		
		int num = 0;
		char lastchar = '一'; // 上次字符,字符特指[十百千万亿],默认随便填写一个'一'	
		char lastshow = '一'; // 上次出现的字符,字符特指[十百千万亿],默认随便填写一个'一'
		char[] ch = word.toCharArray();
		Boolean bool = false; // 是否连续出现[十百千万亿]
		for(int i = 0; i < ch.length; i++) {
			Character find = araHash.get(ch[i]);
			if(find != null) {
				num += Integer.parseInt(String.valueOf(find.charValue()));
				bool = false;
				lastchar = '一'; // 恢复到默认值
				continue;
			} else if(ch[i] == '十') {
				num = ywqbs(num, bool, 10, ch.length - i, ch[i], lastshow);
				bool = true;
				lastchar = '十';
				lastshow = '十';
			}else if(ch[i] == '千') {
				num = ywqbs(num, bool, 1000, ch.length - i, ch[i], lastshow);
				bool = true;
				lastchar = '千';
				lastshow = '千';
			} else if(ch[i] == '百') {
				num = ywqbs(num, bool, 100, ch.length - i, ch[i], lastshow);
				bool = true;
				lastchar = '百';
				lastshow = '百';
			} else if(ch[i] == '万') {
				num = ywqbs(num, bool, 10000, ch.length - i, ch[i], lastshow);
				bool = true;
				lastchar = '万';
				lastshow = '万';
			}
 		}
		ch = null;
		return num;
	}
	
	public static void main(String args[]) {
		String wordes[] = {
				"一千二百二十一万",
				"一千二百二十一",
				"一千零十",
				"一万零一百",
				"一千零十一",
				"一万零一百十一",
				"一千二百十九",
				"一千万"
		};
		for(int i = 0; i < wordes.length; i++) {
			DigitUtil t = new DigitUtil();
			int num = t.parse(wordes[i]);
			System.out.println(wordes[i] + " " + num);
		}
	}
	
}

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