密码验证算法

public class CheckPassword {
	public static String encrypt(String password,String userId){
		password += userId;
		try {
			MessageDigest md5 = MessageDigest.getInstance("MD5");
			md5.update(password.getBytes("UTF-8"));
			byte[] bys=md5.digest();
			password = new String(bys);
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
		return password;
	}
	public static boolean checkPW(String userId,String inputPwd,String encryptPwd) {
		inputPwd += userId;
		try {
			MessageDigest md5 = MessageDigest.getInstance("MD5");
			md5.update(inputPwd.getBytes("UTF-8"));
			byte[] bys=md5.digest();
			String lastPassword = new String(bys);
			if(encryptPwd.equals(lastPassword)) {
				return true;
			}
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		}
		return false;
	}
	public static void main(String[] args) {
		System.out.println(encrypt("qwerty12","1"));
		String userId = "1";
		String password = "qwerty12";
		String encryptPassword = "�\b*��M�OXE<�#x�";
		System.out.println(checkPW(userId,password,encryptPassword));
	}
}