/**
* @param pwd pass cần check
* @param pwdEncoder Md5PasswordEncoder, salt là userName
* @return true nếu pass đúng, false nếu sai
*/
private boolean checkCredentials(String pwd, Md5PasswordEncoder pwdEncoder) {
return pwdEncoder.isPasswordValid(password, pwd, userName);
}
private void populateCredentials(String un, String newPwd, Md5PasswordEncoder pwdEncoder) {
userName = un.trim();
password = pwdEncoder.encodePassword(newPwd, userName);
}