@Bean
	public BlockRequestHandler blockRequestHandler() {
		return new BlockRequestHandler() {
			@Override
			public Mono<ServerResponse> handleRequest(ServerWebExchange exchange,
					Throwable t) {
				return ServerResponse.status(HttpStatus.TOO_MANY_REQUESTS)
						.contentType(MediaType.APPLICATION_JSON).body(fromValue("block"));
			}
		};
	}
@author <a href="mailto:fangjian0423@gmail.com">Jim</a>
spring-cloud-alibaba-examples/sentinel-example/sentinel-webflux-example/src/main/java/com/alibaba/cloud/examples/MyConfiguration.java