<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-loadbalancer</artifactId>
</dependency>

spring:
  application:
    name: nacos-discovery-business
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848
        username: nacos
        password: nacos
        register-enabled: false

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
@SpringBootApplication
@EnableDiscoveryClient
public class BusinessApplication {
 @LoadBalanced
 @Bean
 public RestTemplate restTemplate() {
     return new RestTemplate();
 }
 public static void main(String[] args) {
     SpringApplication.run(BusinessApplication.class, args);
 }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
@RestController
@RequestMapping("/business")
public class BusinessController2 {
 @Autowired
 private RestTemplate restTemplate;
 @RequestMapping("/getnamebyid")
 public String getNameById(Integer id){
     return restTemplate.getForObject("http://nacos-discovery-demo/user/getnamebyid?id="+id,
             String.class);
 }
}

<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>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-loadbalancer</artifactId>
</dependency>

spring:
  application:
    name: nacos-discovery-business
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848
        username: nacos
        password: nacos
        register-enabled: false

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

@Service
@FeignClient(name = "nacos-producer") // name 為生產(chǎn)者的服務(wù)名
public interface UserService {
    @RequestMapping("/user/getinfo") // 調(diào)用生產(chǎn)者的接口
    String getInfo(@RequestParam String name);
}

import com.example.consumer.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class OrderController {
    @Autowired
    private UserService userService;
    @RequestMapping("/order")
    public String getOrder(@RequestParam String name){
        return userService.getInfo(name);
    }
}