Spring Boot和Spring Security，无法在AuthenticationEntryPoint中发送自定义消息错误

import org.springframework.context.annotation.Bean;
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.AuthenticationEntryPoint;

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .exceptionHandling()
                .authenticationEntryPoint(customAuthenticationEntryPoint())
                .and()
            // 其他配置...
            .authorizeRequests()
                .anyRequest().authenticated()
                .and()
            .httpBasic();
    }

    @Bean
    public AuthenticationEntryPoint customAuthenticationEntryPoint() {
        return new CustomAuthenticationEntryPoint();
    }
}

class CustomAuthenticationEntryPoint implements AuthenticationEntryPoint {

    @Override
    public void commence(HttpServletRequest request, HttpServletResponse response,
                         AuthenticationException authException) throws IOException {
        response.sendError(HttpServletResponse.SC_UNAUTHORIZED, "您没有权限访问此资源");
    }
}