我在添加Spring Security时遇到了一些问题。它显示错误提示：没有定义名为’springSecurityFilterChain’的bean

public class WebInitializer implements WebApplicationInitializer {

    public void onStartup(ServletContext servletContext) throws ServletException {


        // Create the 'root' Spring application context
        AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();
        rootContext.register(App.class);
        servletContext.addListener(new ContextLoaderListener(rootContext));


       // security filter
        servletContext.addFilter(
                "springSecurityFilterChain",
                new DelegatingFilterProxy("springSecurityFilterChain"))
                .addMappingForUrlPatterns(null, false, "/*");

        // Manage the lifecycle of the root application context
        AnnotationConfigWebApplicationContext webContext = new AnnotationConfigWebApplicationContext();
        webContext.register(WebConfig.class);
        webContext.setServletContext(servletContext);


        ServletRegistration.Dynamic servlet = servletContext.addServlet("dispatcher", new DispatcherServlet(webContext));
        servlet.addMapping("/");
        servlet.setLoadOnStartup(1);
    }
}

在添加安全过滤器的那一刻，它显示了此错误。我一直疯狂地试图解决这个问题而没有成功。

这是我的 WebSecurityConfigurerAdapter

@Configuration
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        auth.inMemoryAuthentication().withUser("tom").password("123456").roles("USER");
        auth.inMemoryAuthentication().withUser("bill").password("123456").roles("ADMIN");
        auth.inMemoryAuthentication().withUser("james").password("123456").roles("SUPERADMIN");
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {

        http.authorizeRequests()
                .antMatchers("/signin").access("hasRole('ROLE_ADMIN')")
                .and().formLogin();

    }
}

Web配置

@Configuration
@EnableWebMvc
@ComponentScan(value = {"com.hp.visitor.controller"})
@Import({ WebSecurityConfig.class })
public class WebConfig extends WebMvcConfigurerAdapter {

    @Bean
    UrlBasedViewResolver setupViewResolver(){
        UrlBasedViewResolver resolver = new UrlBasedViewResolver();
        resolver.setPrefix("/");
        resolver.setSuffix(".jsp");
        resolver.setViewClass(JstlView.class);
        return resolver;
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/static/**").addResourceLocations("/static/");
    }

}

我已经尝试了很多，但始终显示503错误。

我该如何解决？