新建工程

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由于nacos不兼容spring boot 2.4.4版本，spring.io暂时无法在向导里面添加alibaba的maven依赖。

配置文件application.yaml

nacos:
  discovery:
    server-addr: 192.168.31.20:8848
spring:
  application:
    name: nacos-discovery

server:
  port: 8089

maven依赖

<dependency>
    <groupId>com.alibaba.boot</groupId>
    <artifactId>nacos-discovery-spring-boot-starter</artifactId>
    <version>0.2.2</version>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <version>RELEASE</version>
    <scope>compile</scope>
</dependency>

启动类

package com.example.nacos.discovery;

import com.alibaba.nacos.api.annotation.NacosInjected;
import com.alibaba.nacos.api.exception.NacosException;
import com.alibaba.nacos.api.naming.NamingService;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import javax.annotation.PostConstruct;

@SpringBootApplication
public class NacosDiscoveryDemoApplication {

    @NacosInjected
    private NamingService namingService;

    @Value("${spring.application.name}")
    private String applicationName;

    @Value("${server.port}")
    private Integer serverPort;

    public static void main(String[] args) {
        SpringApplication.run(NacosDiscoveryDemoApplication.class, args);
    }

    @PostConstruct
    public void registerService() throws NacosException {
        namingService.registerInstance(applicationName,"192.168.31.20",serverPort);
    }

}

controller

package com.example.nacos.discovery.controller;

import com.alibaba.nacos.api.annotation.NacosInjected;
import com.alibaba.nacos.api.exception.NacosException;
import com.alibaba.nacos.api.naming.NamingService;
import com.alibaba.nacos.api.naming.pojo.Instance;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
@RequestMapping("discovery")
public class DiscoveryController {

    @NacosInjected
    private NamingService namingService;

    @GetMapping("service")
    public List<Instance> service(@RequestParam String serviceName) throws NacosException {
        return namingService.getAllInstances(serviceName);
    }
}

以上配置完成后，启动服务，在浏览器中访问：

http://localhost:8089/discovery/service?serviceName=nacos-discovery

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