public class TestController {

private static Logger log = LoggerFactory.getLogger(TestController.class);

@GetMapping("/hello")

public String hello(@RequestParam String name) {

log.info("invoked name = " + name);

return "hello " + name;

}

}

新增配置：

应用名

spring.application.name=alibaba-nacos-discovery-server

端口

server.port=8001

Nacos 服务注册中心地址

spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848

启动：

INFO 25148 --- [ main] o.s.c.a.n.registry.NacosServiceRegistry : nacos registry, alibaba-nacos-discovery-server 192.168.10.211:8001 register finished

访问 nacos 管理页面：

[](

)服务消费方

目录结构如下：

pom.xml 依赖配置如以下：

<dependencyManagement>

<dependencies>

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-dependencies</artifactId>

<version>Finchley.SR1</version>

<type>pom</type>

<scope>import</scope>

</dependency>

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-alibaba-dependencies</artifactId>

<version>0.2.2.RELEASE</version>

<type>pom</type>

<scope>import</scope>

</dependency>

</dependencies>

</dependencyManagement>

<dependencies>

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-web</artifactId>

</dependency>

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>

</dependency>

<dependency>

<groupId>org.projectlombok</groupId>

<artifactId>lombok</artifactId>

<version>1.18.2</version>

<optional>true</optional>

</dependency>

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-webflux</artifactId>

</dependency>

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-starter-openfeign</artifactId>

</dependency>

</dependencies>

启动类增加@EnableDiscoveryClient注解，开启 Spring Cloud 的服务注册与发现，添加@EnableFeignClients注解，用于 controller 里多种调用方式演示

@EnableDiscoveryClient

@SpringBootApplication

public class AlibabaNacosDiscoveryServerApplication {

public static void main(String[] args) {

SpringApplication.run(AlibabaNacosDiscoveryServerApplication.class, args);

}

}

提供接口服务TestController，提供多种服务调用方式，分别为 Feign、RestTemplate、WebClient：

@RestController

public class TestController {

@Autowired

private LoadBalancerClient loadBalancerClient;

@Autowired

private RestTemplate restTemplate;

@Autowired

private WebClient.Builder webClientBuilder;

@Autowired

private TestFeignClient client;

/* original */

@GetMapping("/test")

public String test() {

// 通过 spring cloud common 中的负载均衡接口选取服务提供节点实现接口调用

ServiceInstance serviceInstance = loadBalancerClient.choose("alibaba-nacos-discovery-server");

String url = serviceInstance.getUri() + "/hello?name=" + "gaohb";

RestTemplate restTemplate = new RestTemplate();

String result = restTemplate.getForObject(url, String.class);

return "Invoke : " + url + ", return : " + result;

}

/* feign */

@GetMapping("/testFeign")

public String testFeign() {

String result = client.hello("gaohb");

return "Return : " + result;

}

/* RestTemplate */

@GetMapping("/testRestTemplate")

public String testRestTemplate() {

String result = restTemplate.getForObject("http://alibaba-nacos-discovery-se

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rver/hello?name=gaohb", String.class);

return "Return : " + result;

}

/* webClient */

@GetMapping("/testWebClient")

public Mono<String> testWebClient() {

Mono<String> result = webClientBuilder.build()

.get()

.uri("http://alibaba-nacos-discovery-server/hello?name=gaohb")

.retrieve()

.bodyToMono(String.class);

return result;

}

}

新增 feign 客户端TestFeignClient，用于声明式调用服务演示：

@FeignClient("alibaba-nacos-discovery-server")

public interface TestFeignClient {

@GetMapping("/hello")

String hello(@RequestParam(name = "name") String name);

}

另外是RestTemplate 和 WebClient.Builder注册到 Spring 容器，用于 RestTemplate 和 WebClient.Builder 两种服务调用方式演示

@Configuration

public class TestConfig {

@Bean

@LoadBalanced

public RestTemplate restTemplate() {

return new RestTemplate();

}

@Bean

@LoadBalanced

public WebClient.Builder loadBalancedWebClientBuilder() {

return WebClient.builder();

}

}

新增配置：

应用名

spring.application.name=alibaba-nacos-discovery-client-common

端口

server.port=9000

Nacos 服务注册中心地址

spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848

启动：

INFO 25148 --- [ main] o.s.c.a.n.registry.NacosServiceRegistry : nacos registry, alibaba-nacos-discovery-common 192.168.10.211:9000 register finished

访问 nacos 管理页面，服务也正常注册：

访问