服务注册与发现

🐤工程准备

创建父工程，在父工程当中导入依赖

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.5.RELEASE</version>
</parent>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Hoxton.SR3</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-dependencies</artifactId>
            <version>2.2.1.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

创建两个工程user与goods工程，在这里我直接编写了，就不再一一贴图了，因为NetFlix文章中已经有了不懂的可以参考一下创建

https://www.cnblogs.com/BNTang/articles/13468377.html

在user工程当中添加依赖

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

在启动类上添加注解@EnableDiscoveryClient
在配置文件添加添加配置

spring:
  application:
    name: user-client
  cloud:
    nacos:
      discovery:
        # nacos服务的地址，不要加http
        server-addr: localhost:8848

启动工程后，在nacos当中查询服务列表
使用相同方式把goods服务注册到nacos上
在user工程中通过服务发现调用goods工程

@Autowired
private DiscoveryClient discoveryClient;

@RequestMapping(value = "/getGoods.do")
public ResponseResult getGoods() {
    List<ServiceInstance> instances = discoveryClient.getInstances("goods-service");
    ServiceInstance serviceInstance = instances.get(0);
    String url = serviceInstance.getUri() + "/getGoods.do";
    return ResponseResult.success("Goods服务器信息调用成功!", restTemplate.getForObject(url, Object.class));
}