这里的feign依然是原来的feign，只不过将注册中心由eureka换成了nacos。服务提供方参见0.9.0.RELEASE版本的spring cloud alibaba nacos实例，消费方跟提供方一样，只需加入feign的相关内容即可。抡出三板斧：
1、pom加入feign：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion> <groupId>com.wlf</groupId>
<artifactId>spring-cloud-alibaba-consumer</artifactId>
<version>0.0.1-SNAPSHOT</version> <parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.7.RELEASE</version>
</parent> <dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Greenwich.SR2</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>0.9.0.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement> <dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency> <dependency>
<groupId>org.springframework.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.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
</dependencies> <build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build> </project>
2、application同服务提供方，只需注册到nacos即可：
#端口
server.port=8383
#应用名
spring.application.name=lxytrans-consumer
#注册中心
spring.cloud.nacos.discovery.server-addr=localhost:8848
3、启动类中加入注解@EnableFeignClients，引入服务提供方接口，并通过注解指向服务提供方服务实例@FeignClient("lxytrans-provider")：
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController; @EnableFeignClients
@EnableDiscoveryClient
@SpringBootApplication
public class TransConsumerApplication { public static void main(String[] args) {
SpringApplication.run(TransConsumerApplication.class, args);
} @Slf4j
@RestController
static class TestController { @Autowired
private ApplicationApi applicationApi; @GetMapping("/sayhello")
public String sayhello() {
return "say: " + applicationApi.hello();
} } @FeignClient("lxytrans-provider")
interface ApplicationApi { @GetMapping("/hello")
String hello(); } }
消费者跑起来后可在nacos中看到：
通过消费方调用提供方：