依赖 

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
            <version>2021.1</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <version>2021.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-loadbalancer</artifactId>
        </dependency>

网关配置文件

spring:
  application:
    name: mytest-gateway
  cloud:
    nacos:
      discovery:
        namespace:
        server-addr: 127.0.0.1:8848
    gateway:
      httpclient:
        connect-timeout: 1000
        response-timeout: 1s
      routes:
        - id: testMod
          uri: lb://test-Mod
          predicates:
            - Path=/test/**
          filters:
            - StripPrefix=1

服务配置文件

spring:
  application:
    name: test-Mod
  cloud:
    nacos:
      discovery:
        namespace:
        server-addr: 127.0.0.1:8848

@RestController
public class HealthController {

    @GetMapping("/health")
    public String testMe() {

        try {
            Thread.sleep(2000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "this is working";
    }
}

访问显示超时

自定义返回信息:

网关配置:

/**
 *自定义异常处理
 */
public class GlobalWebExceptionHandler implements ErrorWebExceptionHandler {
    @Override
    public Mono<Void> handle(ServerWebExchange exchange, Throwable ex) {

        ServerHttpResponse response = exchange.getResponse();
        return response
                .writeWith(Mono.fromSupplier(() -> {
                    DataBufferFactory bufferFactory = response.bufferFactory();

                        HashMap<String, Object> map = new HashMap<>();
                        map.put("errCode", "000");
                        map.put("errMsg", "当前在线人数较多");

                        //返回json异常原因给前端
                        return bufferFactory.wrap(JSON.toJSONBytes(map));
                }));
    }
}

/**
 * 注册异常处理器
 */
@Configuration
public class GatewayExceptionConfig {

    @Primary
    @Bean
    @Order(Ordered.HIGHEST_PRECEDENCE)
    public ErrorWebExceptionHandler errorWebExceptionHandler(ObjectProvider<List<ViewResolver>> viewResolversProvider,
                                                             ServerCodecConfigurer serverCodecConfigurer) {
        return new GlobalWebExceptionHandler();
    }
}