我创建了一个密码编码器bean，我只是在UserService -〉createUser（）方法中调用了passwordEncoder.encode（）方法。但是Spring是如何理解“当登录请求到来时，我必须使用密码编码器”的。我没有在任何地方将passwordEncoder作为参数传递。

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
@RequiredArgsConstructor

public class SecurityConfig {

private final JwtFilter jwtFilter;
private final JwtAuthenticationEntryPoint authenticationEntryPoint;
private final JWTAccessDeniedHandler accessDeniedHandler;

@Bean
public BCryptPasswordEncoder bCryptPasswordEncoder() {
    return new BCryptPasswordEncoder();
}

@Bean
public AuthenticationManager authenticationManager(final AuthenticationConfiguration authenticationConfiguration) throws Exception {
    return authenticationConfiguration.getAuthenticationManager();
}

@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
    return http
            .headers().frameOptions().disable().and()
            .csrf().disable()
            .cors().and()
            .authorizeRequests(auth -> {
                auth.antMatchers("/api/admin").hasAuthority("ADMIN");
                auth.antMatchers("/api/user").hasAnyAuthority("ADMIN", "USER");
                auth.anyRequest().authenticated();
            })
            .formLogin().disable()
            .httpBasic().disable()
            .exceptionHandling().accessDeniedHandler(accessDeniedHandler)
            .authenticationEntryPoint(authenticationEntryPoint)
            .and()
            .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
            .and()
            .addFilterBefore(jwtFilter, UsernamePasswordAuthenticationFilter.class)
            .build();

}

@Bean
public WebSecurityCustomizer webSecurityCustomizer() {
    return (web) -> web.ignoring().antMatchers("/api/public", "/h2-console/**", "/api/auth/login");
}

@Bean
public WebMvcConfigurer corsConfigurer() {
    return new WebMvcConfigurer() {
        @Override
        public void addCorsMappings(CorsRegistry registry) {
            registry.addMapping("/**")
                    .allowedMethods("*");
        }
    };
}

}