微服务nacos服务注册与发现

一，以上一篇为基础 微服务从nacos配置中心获得配置信息

　　给service1, service2添加依赖

　　　　 <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

　　给service1, service2添加配置项

nacos:
    discovery:
        server-addr: 127.0.0.1:8848
        namespace: c22e5019-0bee-43b1-b80b-fc0b9d847501

二，实现service1, service2

　　分别编写基础的controller，向外提供restapi

　　启动service1，service2，就会自动的向nacos注册这两个服务，服务名为spring.application.name

三，测试，编写调用service1, service2的demo模块，

　　1，new -> module -> Maven -> 填写xx -> finish

　　2，添加依赖

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
    </dependencies>

　　3，添加配置bootstrap.yml

spring:
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
        namespace: c22e5019-0bee-43b1-b80b-fc0b9d847501

　　4，编写启动程序，编写controller，编写接口调用service1, service2　

　　启动类：

@SpringBootApplication
@EnableFeignClients
@EnableDiscoveryClient
public class DemoApplication {
    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }
}

　　接口调用：

@FeignClient(value = "service1")
public interface UserClient {
    @GetMapping("/user/name")
    public String getName();

    @GetMapping("/user/address")
    public String getAddress();
}

@FeignClient(value = "service2")
public interface OrderClient {

    @GetMapping("/order/id")
    public String getId();

    @GetMapping("/order/price")
    public double getPrice();
}

　　controller：

@RestController
@RequestMapping("/demo")
public class DemoController {

    @Autowired
    private UserClient userClient;

    @Autowired
    private OrderClient orderClient;

    @GetMapping("/test")
    public String test(){
        return "test, name:"
                + userClient.getName()
                + ", address:" + userClient.getAddress()
                + "order_id:" + orderClient.getId()
                + "order_price:" + orderClient.getPrice();
    }
}

输出：test, name:天涯, address:中国order_id:10000111##order_price:100.5

调用完成！