비밀번호 해시함수 사용

private String getHash(String text) throws NoSuchAlgorithmException, UnsupportedEncodingException
	{
		String pw = text;	
		
		MessageDigest md = MessageDigest.getInstance("SHA-512");
		md.reset();
		
		md.update(pw.getBytes("UTF-8"));
		String hashpw = String.format("%0128x",new BigInteger(1,md.digest()));
		
		return hashpw;
	}