注入的Spring Bean在Spring引导应用程序中为空

@Component
public class RequestInterceptor extends HandlerInterceptorAdapter {

@Autowired
RequestParser requestParser;


@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
        throws Exception {

    //HandlerMethod handlerMethod = (HandlerMethod) handler;
    requestParser.parse(request);
    return true;
}
}

RequestInterceptor RequestParser 负责解析请求。

@Component
public class RequestParserDefault implements RequestParser {

@Override
public void parse(HttpServletRequest request) {

    System.out.println("Parsing incomeing request");
}

}

拦截器注册

@Configuration  
public class WebMvcConfig extends WebMvcConfigurerAdapter  {  

@Override
public void addInterceptors(InterceptorRegistry registry) {
   registry.addInterceptor(new RequestInterceptor()).addPathPatterns("/usermanagement/v1/**");
}
} 

@SpringBootApplication
public class SpringBootApp {

public static void main(String[] args) {
    SpringApplication.run(SpringBootApp.class, args);

}
}

现在,当一个请求进来时,它就会登陆 preHandle 方法 但是 为空。如果我删除 @Component 注释自 请求解析器 我在Spring上下文初始化期间出错 No bean found of type RequestParser 请求解析器 在Spring上下文中注册为Spring bean,但为什么在注入时为NULL?有什么建议吗?