/**
 * MD5 加密工具类
 * 
 * @author chenxin
 * @version [版本号, 2012-5-21]
 * @see [相关类/方法]
 * @since [产品/模块版本]
 */
public class MD5Util {

	public MD5Util() {
		
	}

	/**
	 * 获取加密串
	 * 
	 * @param s
	 * @return
	 */
	public static final String getMd5Str(String s) {
		char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
				'a', 'b', 'c', 'd', 'e', 'f' };
		char str[];
		byte strTemp[] = s.getBytes();
		MessageDigest mdTemp;
		try {
			mdTemp = MessageDigest.getInstance("MD5");

			mdTemp.update(strTemp);
			byte md[] = mdTemp.digest();
			int j = md.length;
			str = new char[j * 2];
			int k = 0;
			for (int i = 0; i < j; i++) {
				byte byte0 = md[i];
				str[k++] = hexDigits[byte0 >>> 4 & 0xf];
				str[k++] = hexDigits[byte0 & 0xf];
			}
			return new String(str);
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
			return null;
		}
	}


}