@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private UserDetailsService userDetailsService;

Error creating bean with name 'securityConfig': Unsatisfied dependency expressed through field 'userDetailsService'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.security.core.userdetails.UserDetailsService' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

public class InternationalizationConfig implements WebMvcConfigurer 

public class SecurityConfig extends WebSecurityConfigurerAdapter 

public class WebConfig implements WebMvcConfigurer 

public class SecurityInitializer extends AbstractSecurityWebApplicationInitializer

public class WebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer 

@Configuration
@ComponentScan("com.aip.servlet.service")
@Import(value = ApplicationConfigurationDao.class)
public class ApplicationConfigurationService 

public class WebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer

getRootConfigClasses

ApplicationConfigurationService.class