Java 飞行前响应的oauth/token的HTTP状态代码401无效

我在spring boot中为CORS实现了过滤器，代码如下：-

@SpringBootApplication
@Component
public class Application implements Filter {
public static void main(String[] args) {
    SpringApplication.run(Application.class, args);
}

@Override
public void init(FilterConfig filterConfig) throws ServletException {

}

@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
    HttpServletRequest request = (HttpServletRequest) servletRequest;
    HttpServletResponse response = (HttpServletResponse) servletResponse;

    response.setHeader("Access-Control-Allow-Origin", "*");
    response.setHeader("Access-Control-Allow-Credentials", "true");
    response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
    response.setHeader("Access-Control-Max-Age", "3600");
    response.setHeader("Access-Control-Allow-Headers", "Content-Type, Accept, X-Requested-With, remember-me");

    filterChain.doFilter(servletRequest, servletResponse);
}

@Override
public void destroy() {

}
}

为了从oauth2获取访问令牌，我从angularjs创建了以下对象：-

 {"url":"http://localhost:8080/oauth/token?grant_type=client_credentials&client_id=clientId&client_secret=clientSecret","headers":{"Authorization":"Basic token_value"},"withCredentials":true,"method":"POST"}

当我点击服务器时，出现以下错误：-

OPTIONS url... 401() Response for preflight has invalid HTTP status code 401

我已经为堆栈溢出中的类似问题寻找了解决方案，但没有一个解决了我的问题。有人能帮我解决这个问题吗？

请阅读更多信息

如果服务器支持跨源请求，他们只建议浏览器。对此类

选项
请求的响应应良好（即<400）

我认为语句
filterChain.doFilter（servletRequest，servletResponse）
正在进一步传递请求，而不是返回响应

您可以在这里阅读有关在Java中使用Spring启用CORS的更多信息
下面的一段代码解决了我的问题

@Bean
public FilterRegistrationBean corsFilter() {
    UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
    CorsConfiguration config = new CorsConfiguration();
    config.setAllowCredentials(true);
    config.addAllowedOrigin("*");
    config.addAllowedHeader("*");
    config.addAllowedMethod("*");
    source.registerCorsConfiguration("/**", config);
    FilterRegistrationBean bean = new FilterRegistrationBean(new CorsFilter(source));
    bean.setOrder(Ordered.HIGHEST_PRECEDENCE);
    return bean;
}

代码示例取自
我也尝试了中提供的解决方案，但没有任何帮助