静态引用WebSecurityConfigurerAdapter以获取随机CSP随机数哈希？

import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.web.header.writers.StaticHeadersWriter;
import org.springframework.security.web.header.writers.frameoptions.XFrameOptionsHeaderWriter;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;

public class MySecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.headers()
                .addHeaderWriter(new StaticHeadersWriter("Content-Security-Policy", "default-src 'self'"))
                .addHeaderWriter(new XFrameOptionsHeaderWriter(XFrameOptionsHeaderWriter.XFrameOptionsMode.SAMEORIGIN));

        http.authorizeRequests()
                .antMatchers("/public/**").permitAll()
                .anyRequest().authenticated()
                .and()
                .formLogin()
                .loginPage("/login")
                .permitAll()
                .and()
                .logout()
                .logoutRequestMatcher(new AntPathRequestMatcher("/logout"))
                .logoutSuccessUrl("/login?logout")
                .permitAll();
    }
}