无法通过Spring Boot和基于Java的配置注入UserDetailsManager

我有使用基于Java的配置来配置JdbcUserDetailsManager的spring boot webapp：

@Configuration
@EnableWebMvcSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    protected DataSource dataSource;

    @Autowired
    public void configAuthentication(AuthenticationManagerBuilder auth) throws Exception {
      auth.jdbcAuthentication()                
        .dataSource(dataSource)                
        .usersByUsernameQuery("select username as principal, password as credentials, true from users where username = ?")               
        .authoritiesByUsernameQuery("select username as principal, authority as role from authorities where username = ?")                
        .rolePrefix("ROLE_");
    }   

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .csrf().disable()
            .authorizeRequests()
                .antMatchers("/api/**")
                .authenticated()
            .and()
            .formLogin()
                .successHandler(
                    (request, response, authentication) -> {
                        response.setStatus(HttpStatus.NO_CONTENT.value());
                    })
                .failureHandler(
                    (request, response, authentication) -> {
                        response.setStatus(HttpStatus.FORBIDDEN.value());
                    })
            .and()
            .logout()
                .logoutUrl("/logout")
                .logoutSuccessHandler(
                    (request, response, authentication) -> {
                        response.setStatus(HttpStatus.NO_CONTENT.value());
                    }); 
    }

}

我可以在中设置一个断点configAuthentication()，因此我知道该方法正在被调用。我现在想JdbcUserDetailsManager在我的Application类中注入：

@EnableAutoConfiguration
@ComponentScan
public class Application {

    private Environment env;
    private UserDetailsManager userDetailsManager;

    @Autowired
    public Application(JdbcTemplate jdbcTemplate, Environment env, UserDetailsManager userDetailsManager) {
        this.env = env;
        this.userDetailsManager = userDetailsManager;
        ...

当我尝试启动我的应用程序时，出现以下错误：

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'application': Unsatisfied dependency expressed through constructor argument with index 2 of type [org.springframework.security.provisioning.UserDetailsManager]: : No qualifying bean of type [org.springframework.security.provisioning.UserDetailsManager] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.security.provisioning.UserDetailsManager] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}

但是我知道一个事实，即在调用Application构造函数之前实例化了JdbcUserDetailsManager 。这里发生了什么？如何验证JdbcUserDetailsManager是否实际在上下文中注册？

更新：通过更改SecurityConfig以下内容，我能够解决问题：

@Configuration
@EnableWebMvcSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    protected DataSource dataSource;
    private JdbcUserDetailsManager userDetailsManager;

    @Autowired
    public void configAuthentication(AuthenticationManagerBuilder auth) throws Exception {
        this.userDetailsManager = auth.jdbcAuthentication().dataSource(dataSource)
            .usersByUsernameQuery(
                "select username,password,enabled from users where username=?")
            .authoritiesByUsernameQuery(
                "select username, role from user_roles where username=?").getUserDetailsService();
    }

    @Bean(name = "userDetailsManager")
    public JdbcUserDetailsManager getUserDetailsManager() {
        return userDetailsManager;
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .csrf().disable()
            .authorizeRequests()
            .antMatchers("/api/**")
            .authenticated()
            .and()
            .formLogin()
            .successHandler(
                (request, response, authentication) -> {
                    response.setStatus(HttpStatus.NO_CONTENT.value());
                })
            .failureHandler(
                (request, response, authentication) -> {
                    response.setStatus(HttpStatus.FORBIDDEN.value());
                })
            .and()
            .logout()
            .logoutUrl("/logout")
            .logoutSuccessHandler(
                (request, response, authentication) -> {
                    response.setStatus(HttpStatus.NO_CONTENT.value());
                });
    }

}

前往PlínioPantaleão，向正确的方向推动我。不幸的是，我无法授予Bounty评论。我也不清楚为什么AuthenticationManagerBuilder不能在上下文中自动将UserDetailsS​​ervice注册为Bean。如果有人可以提供关于为什么我必须提供吸气剂的权威性答案，或者可以解释为什么没有吸气剂就可以使它工作（这对我来说有点不客气），那么我将奖励该答案。