How to get the user entered values of username and password in a spring security authenticated login

Question

I use Spring MVC in my application and the login is authenticated by spring security. I have the following two methods in my UserServiceImpl.java class, public

Answer 1

if you want, you can create your own AuthenticationProvider

public class CustomAuthenticationProvider implements AuthenticationProvider{

    private UserDetailsService service;

    @Override
    public Authentication authenticate(Authentication authentication) throws AuthenticationException {
        UsernamePasswordAuthenticationToken token = (UsernamePasswordAuthenticationToken) authentication;
        String username = token.getName();
        String password = token.getCredentials(); // retrieve the password 
        // do something here

        // if ok then return the authentication
        return new UsernamePasswordAuthenticationToken(username, password, authorities);
    }
}

and plug it to your security configuration