添加gateway依赖

<dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>

创建一个LogTimeGateWayFilterFactory类，可以不是这个名字但是后面必须是xxxGateWayFilterFactory
然后继承AbstractNameValueGatewayFilterFactory

@Component
@Slf4j
public class LogTimeGatewayFilterFactory extends AbstractNameValueGatewayFilterFactory {@Overridepublic GatewayFilter apply(NameValueConfig config) {return new GatewayFilter() {@Overridepublic Mono<Void> filter(ServerWebExchange exchange,GatewayFilterChain chain) {//获取配置的超时时间String value = ServerWebExchangeUtils.expand(exchange, config.getValue());Integer timespan = Integer.valueOf(value);//获取开始时间long start = System.currentTimeMillis();// 往下执行完并返回后   操作.then对执行结果操作完之后在返回return chain.filter(exchange).then(Mono.fromRunnable(()->{//获取结束时间long end = System.currentTimeMillis();//获取请求耗时long time = end - start;//判断是否超时if(time > timespan*1000){log.debug("请求耗时:{}ms",time);}}));}@Overridepublic String toString() {return filterToStringCreator(LogTimeGatewayFilterFactory.this).append(config.getName(), config.getValue()).toString();}};}
}

配置文件里配置，LogTime就是类名，但是不能带着GateWayFilterFactory