Java简单实现MD5加密

public class CiferUtil {
	private static final char[] HEX_0X = { '0', '1', '2', '3', '4', '5', '6',
			'7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };

	public static String ciferByMD5(final String source) {
		try {
			// 利用MessageDigest类得到加密结果16个字节
			MessageDigest md = MessageDigest.getInstance("MD5");
			md.update(source.getBytes());
			byte[] bytes = md.digest();
			String result = "";
			// 把16个字节转换成16进制数
			for (byte b : bytes) {
				// 取字节高4位转换
				result += HEX_0X[b >>> 4 & 0xf];
				// 取字节低4位转换
				result += HEX_0X[b & 0xf];
			}
			return result;
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		}
		return null;
	}

	public static void main(String[] args) {
		System.out.println(CiferUtil.ciferByMD5("abc4324"));
	}
}