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springboot安全角色不工作（3个答案）
两天前关门了。
我在SpringBoot项目中为SpringSecurity提供了以下文件。当我使用inmemoryauthentication时，它起作用，但当我使用CustomUserDetails服务时，它不起作用。自定义userdetailsservice类被调用，但仍然给出403（当我尝试访问/user时），但它适用于打开的URL（/usr）。

import org.springframework.security.core.userdetails.User
@Service
public class UserDetailsServiceImpl implements UserDetailsService {
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        //not using parameter which is being passed as trying to figure out the problem first.
        UserDetails user = User.withUsername("abc").password("abc").authorities("ADMIN").build();
        return user;
    }
}

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    @Autowired
    UserDetailsServiceImpl userDetailsService;
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService).passwordEncoder(getPasswordEncoder());
//      auth.inMemoryAuthentication().withUser("abc").password("abc").roles("ADMIN");
    }
    @Bean
    public PasswordEncoder getPasswordEncoder() {
        return NoOpPasswordEncoder.getInstance();
    }
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
        .antMatchers("/api/user").hasRole("ADMIN")
        .antMatchers("/").permitAll()
        .and().formLogin();
    }
}

@RestController
@RequestMapping("/api")
public class UserController {
    @GetMapping("/usr")
    public ResponseEntity<String> getOpenResponse() {
        return ResponseEntity.ok("You are accessing open url");
    }
    @GetMapping("/user")
    public ResponseEntity<String> getSecuredResponse() {
        return ResponseEntity.ok("You are accessing secured path");
    }
}

我做错了什么？我错过什么了吗？