spring-cloud-starter-alibaba-nacos-discovery如何从nacos上获得已经注册的服务地址

在Spring Cloud中，可以使用Spring Cloud Alibaba Nacos Discovery来从Nacos服务器获取所有微服务的地址。你需要在你的微服务中添加以下依赖：

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

然后在application.properties或application.yml中配置Nacos服务器的地址：

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

然后注入DiscoveryClient

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
 
@RestController
public class ServiceController {
 
    @Autowired
    private DiscoveryClient discoveryClient;
 
    @GetMapping("/services")
    public List<String> getServices() {
        return discoveryClient.getServices();
    }
}

根据服务名称获得ip跟端口

List<ServiceInstance> instances = discoveryClient.getInstances("xxx");
        
for (ServiceInstance instance : instances) {
    System.out.println(instance.getHost() + ":" + instance.getPort());
     }

over~~