How to pass Authorities with multiple roles?

Question

Java

Greetings dear forum users.

Can you please tell me how to transfer multiple roles?

public class UserDetail implements UserDetailsService {

    @Override
    public UserDetails loadUserByUsername(String email) throws UsernameNotFoundException {

        return new org.springframework.security.core.userdetails.User("user", "1234",
                true, true, true, true, getAuthorities());

    }


    private Collection<? extends GrantedAuthority> getAuthorities(){

        // Тут я возвращаю роль. Как вернуть несколько ролей?
        return Collections.singletonList(new SimpleGrantedAuthority("ROLE_USER"));

    }




}

Answer 1

Java 9+

return List.of(new SimpleGrantedAuthority("ROLE_USER1"),
                                 new SimpleGrantedAuthority("ROLE_USER2"),
                                 new SimpleGrantedAuthority("ROLE_USER3"));