自定义的AccessDecisionManager的验证方法 ，怎么在配置@PreAuthorize

@PreAuthorize 注解是用于在方法调用之前进行权限检查的，它使用Spring Security的表达式语言（SpEL）指定权限检查规则。默认情况下，SpEL表达式会调用底层的AccessDecisionManager进行权限检查。

如果你要使用自定义的AccessDecisionManager进行权限检查，需要在Spring Security配置类中，手动指定AccessDecisionManager。例如：

@Configuration
@EnableWebSecurity
public class MySecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private AccessDecisionManager myAccessDecisionManager;

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
            .antMatchers("/admin/**").hasRole("ADMIN")
            .anyRequest().authenticated()
            .and()
            .formLogin()
            .and()
            .httpBasic();
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.inMemoryAuthentication()
            .withUser("user").password("{noop}password").roles("USER")
            .and()
            .withUser("admin").password("{noop}password").roles("ADMIN");
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
            .antMatchers("/admin/**").hasRole("ADMIN")
            .anyRequest().authenticated()
            .and()
            .formLogin()
            .and()
            .httpBasic()
            .and()
            .csrf().disable()
            .exceptionHandling()
            .accessDeniedHandler(accessDeniedHandler());
    }

    @Bean
    public AccessDeniedHandler accessDeniedHandler() {
        return new CustomAccessDeniedHandler();
    }

    @Bean
    public FilterSecurityInterceptor filterSecurityInterceptor() throws Exception {
        FilterSecurityInterceptor filterSecurityInterceptor = new FilterSecurityInterceptor();
        filterSecurityInterceptor.setAuthenticationManager(authenticationManager());
        filterSecurityInterceptor.setAccessDecisionManager(myAccessDecisionManager);
        filterSecurityInterceptor.setSecurityMetadataSource(securityMetadataSource());
        return filterSecurityInterceptor;
    }

    @Bean
    public MySecurityMetadataSource securityMetadataSource() {
        return new MySecurityMetadataSource();
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.addFilterBefore(filterSecurityInterceptor(), FilterSecurityInterceptor.class);
    }

}

在这个例子中，我们使用自定义的AccessDecisionManager，并将它注入到了FilterSecurityInterceptor中。然后，我们在configure方法中，添加了一个FilterSecurityInterceptor的Bean，并将它添加到了HttpSecurity中。这样，在使用@PreAuthorize注解时，就会使用我们自定义的AccessDecisionManager进行权限检查。