使用mvn spring boot启动时：run或甚至使用gradle返回该问题。

***************************
APPLICATION FAILED TO START
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Description:

Field userDetailsService in webroot.websrv.auth.config.WebSecurityConfiguration required a bean of type 'org.springframework.security.core.userdetails.UserDetailsService' that could not be found.


Action:

Consider defining a bean of type 'org.springframework.security.core.userdetails.UserDetailsService' in your configuration.


BUILD SUCCESSFUL

Total time: 19.013 secs

这里是主要的类，在我看来所有的需求都可以，我使用的是org.springframework.boot版本1.5.7

package webroot.websrv.auth.config;

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {

    @Autowired
    private JwtAuthenticationEntryPoint unauthorizedHandler;

    @Autowired
    private UserDetailsService userDetailsService;

    @Autowired
    public void configureAuthentication(AuthenticationManagerBuilder authenticationManagerBuilder) throws Exception {
        authenticationManagerBuilder
                .userDetailsService(userDetailsService)
                .passwordEncoder(passwordEncoder());
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Bean
    public JwtAuthenticationTokenFilter authenticationTokenFilterBean() throws Exception {
        return new JwtAuthenticationTokenFilter();
    }

    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {
        httpSecurity
                .csrf().disable()

                .exceptionHandling().authenticationEntryPoint(unauthorizedHandler).and()
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
                .authorizeRequests()
                .antMatchers(
                        HttpMethod.GET,
                        "/",
                        "/**/*.html",
                        "/**/*.{png,jpg,jpeg,svg.ico}",
                        "/**/*.css",
                        "/**/*.js"
                ).permitAll()
                .antMatchers("/api/auth/**").permitAll()
                .anyRequest().authenticated();

        httpSecurity
                .addFilterBefore(authenticationTokenFilterBean(), UsernamePasswordAuthenticationFilter.class);

        httpSecurity.headers().cacheControl();
    }
}

以及：

package webroot.websrv;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class WebcliApplication {

    public static void main(String[] args) {
        SpringApplication.run(WebcliApplication.class, args);
    }
} 

使用Maven或Gradle会返回相同的问题。所有注释和包名称似乎都符合要求。