如何创建Request-Header Authentication (Siteminder) java配置类

import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.web.authentication.preauth.RequestHeaderAuthenticationFilter;

@Configuration
@EnableWebSecurity
public class RequestHeaderAuthenticationConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .addFilter(requestHeaderAuthenticationFilter())
            .authorizeRequests()
                .anyRequest().authenticated()
                .and()
            .formLogin()
                .loginPage("/login")
                .permitAll();
    }

    @Bean
    public RequestHeaderAuthenticationFilter requestHeaderAuthenticationFilter() throws Exception {
        RequestHeaderAuthenticationFilter filter = new RequestHeaderAuthenticationFilter();
        filter.setPrincipalRequestHeader("Siteminder-User");
        filter.setAuthenticationManager(authenticationManager());
        filter.setExceptionIfHeaderMissing(false);
        filter.setAuthenticationSuccessHandler(new MyAuthenticationSuccessHandler());
        filter.setAuthenticationFailureHandler(new MyAuthenticationFailureHandler());
        return filter;
    }
}