spring security动态配置权限的方案2

@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Bean
    public ExtAuthProvider extAuthProvider(){
        return new ExtAuthProvider();
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                .authorizeRequests()
                .antMatchers("/login/**","/logout/**")
                .permitAll()
                .anyRequest().access("@authService.canAccess(request,authentication)");
    }

@Component
public class AuthService {

    public boolean canAccess(HttpServletRequest request, Authentication authentication) {
        Object principal = authentication.getPrincipal();
        if(principal == null){
            return false;
        }

        if(authentication instanceof AnonymousAuthenticationToken){
            //check if this uri can be access by anonymous
            //return
        }

        Set<String> roles = authentication.getAuthorities()
                .stream()
                .map(e -> e.getAuthority())
                .collect(Collectors.toSet());
        String uri = request.getRequestURI();
        //check this uri can be access by this role

        return true;

    }
}