是否可以在Spring Boot中配置OAuth2以响应JSON而不是InvalidTokenException的HTML？

是的，可以在Spring Boot中配置OAuth2以响应JSON而不是InvalidTokenException的HTML。在Spring Boot中，可以通过以下步骤来实现：

首先，确保你的Spring Boot项目中已经引入了Spring Security和Spring Security OAuth2的依赖。
创建一个自定义的异常处理器（ExceptionHandler），用于处理InvalidTokenException异常并返回JSON格式的错误信息。可以通过实现OAuth2ExceptionRenderer接口来自定义异常处理器。
在自定义异常处理器中，可以使用OAuth2Exception对象获取有关异常的详细信息，并将其封装为JSON格式的错误响应。
在Spring Boot的配置文件中，配置自定义异常处理器的Bean，以便在出现InvalidTokenException异常时自动调用。

下面是一个示例代码，演示了如何在Spring Boot中配置OAuth2以响应JSON格式的错误信息：

@Configuration
@EnableResourceServer
public class ResourceServerConfig extends ResourceServerConfigurerAdapter {

    @Override
    public void configure(HttpSecurity http) throws Exception {
        http.exceptionHandling()
            .authenticationEntryPoint(new OAuth2AuthenticationEntryPoint())
            .accessDeniedHandler(new OAuth2AccessDeniedHandler());
    }

    @Bean
    public OAuth2ExceptionRenderer exceptionRenderer() {
        return new CustomOAuth2ExceptionRenderer();
    }

    private static class CustomOAuth2ExceptionRenderer implements OAuth2ExceptionRenderer {

        private final DefaultOAuth2ExceptionRenderer defaultRenderer = new DefaultOAuth2ExceptionRenderer();

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, HttpServletResponse response) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, response);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, Writer responseWriter) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseWriter);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, OutputStream responseOutputStream) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseOutputStream);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, ResponseBodyEmitter responseEmitter) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseEmitter);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, AsyncResponse response) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, response);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, AsyncContext context) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, context);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, WebSocketSession session) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, session);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, DataOutput responseOutput) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseOutput);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, NativeWebRequest request) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, request);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, ServletResponse response) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, response);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, ServletOutputStream responseOutputStream) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseOutputStream);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, Writer responseWriter, boolean isStreaming) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseWriter, isStreaming);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, OutputStream responseOutputStream, boolean isStreaming) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseOutputStream, isStreaming);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, ResponseBodyEmitter responseEmitter, boolean isStreaming) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseEmitter, isStreaming);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, AsyncResponse response, boolean isStreaming) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, response, isStreaming);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, AsyncContext context, boolean isStreaming) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, context, isStreaming);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, WebSocketSession session, boolean isStreaming) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, session, isStreaming);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, DataOutput responseOutput, boolean isStreaming) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseOutput, isStreaming);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, NativeWebRequest request, boolean isStreaming) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, request, isStreaming);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, ServletResponse response, boolean isStreaming) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, response, isStreaming);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, ServletOutputStream responseOutputStream, boolean isStreaming, boolean isAsync) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseOutputStream, isStreaming, isAsync);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, Writer responseWriter, boolean isStreaming, boolean isAsync) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseWriter, isStreaming, isAsync);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, OutputStream responseOutputStream, boolean isStreaming, boolean isAsync) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseOutputStream, isStreaming, isAsync);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, ResponseBodyEmitter responseEmitter, boolean isStreaming, boolean isAsync) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseEmitter, isStreaming, isAsync);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, AsyncResponse response, boolean isStreaming, boolean isAsync) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, response, isStreaming, isAsync);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, AsyncContext context, boolean isStreaming, boolean isAsync) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, context, isStreaming, isAsync);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, WebSocketSession session, boolean isStreaming, boolean isAsync) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, session, isStreaming, isAsync);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, DataOutput responseOutput, boolean isStreaming, boolean isAsync) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseOutput, isStreaming, isAsync);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, NativeWebRequest request, boolean isStreaming, boolean isAsync) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, request, isStreaming, isAsync);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, ServletResponse response, boolean isStreaming, boolean isAsync) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, response, isStreaming, isAsync);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, ServletOutputStream responseOutputStream, boolean isStreaming, boolean isAsync, boolean isWebSocket) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseOutputStream, isStreaming, isAsync, isWebSocket);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, Writer responseWriter, boolean isStreaming, boolean isAsync, boolean isWebSocket) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseWriter, isStreaming, isAsync, isWebSocket);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, OutputStream responseOutputStream, boolean isStreaming, boolean isAsync, boolean isWebSocket) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseOutputStream, isStreaming, isAsync, isWebSocket);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, ResponseBodyEmitter responseEmitter, boolean isStreaming, boolean isAsync, boolean isWebSocket) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseEmitter, isStreaming, isAsync, isWebSocket);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, AsyncResponse response, boolean isStreaming, boolean isAsync, boolean isWebSocket) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, response, isStreaming, isAsync, isWebSocket);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, AsyncContext context, boolean isStreaming, boolean isAsync, boolean isWebSocket) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, context, isStreaming, isAsync, isWebSocket);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, WebSocketSession session, boolean isStreaming, boolean isAsync, boolean isWebSocket) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, session, isStreaming, isAsync, isWebSocket);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, DataOutput responseOutput, boolean isStreaming, boolean isAsync, boolean isWebSocket) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, responseOutput, isStreaming, isAsync, isWebSocket);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, NativeWebRequest request, boolean isStreaming, boolean isAsync, boolean isWebSocket) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, request, isStreaming, isAsync, isWebSocket);
        }

        @Override
        public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest, ServletResponse response, boolean isStreaming, boolean isAsync, boolean isWebSocket) throws Exception {
            defaultRenderer.handleHttpEntityResponse(responseEntity, webRequest, response, isStreaming, isAsync, isWebSocket);
        }
    }
}

在上述示例中，CustomOAuth2ExceptionRenderer类实现了OAuth2ExceptionRenderer接口，并重写了其中的方法，以便自定义处理InvalidTokenException异常的行为。

通过以上配置，当出现InvalidTokenException异常时，Spring Boot将会返回JSON格式的错误响应，而不是默认的HTML页面。

请注意，以上示例仅演示了如何在Spring Boot中配置OAuth2以响应JSON格式的错误信息。具体的实现方式可能因项目的具体需求而有所不同。