Feign服务注册到nacos 2.2.3

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前言

环境：
jdk1.8
spring boot：2.6.15
spring cloud：2021.0.9
spring cloud alibaba：2021.0.5.0
nacos server：2.2.3

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一、父POM

<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.test.demo</groupId><artifactId>nacos-demo</artifactId><version>1.0-SNAPSHOT</version><packaging>pom</packaging><name>nacos-demo</name><url>http://maven.apache.org</url><modules><module>backend-service</module><module>front-service</module></modules><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencyManagement><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-dependencies</artifactId><version>2.6.15</version><type>pom</type><scope>import</scope></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>2021.0.9</version><type>pom</type><scope>import</scope></dependency><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-alibaba-dependencies</artifactId><version>2021.0.5.0</version><type>pom</type><scope>import</scope></dependency></dependencies></dependencyManagement>
</project>

二、服务端

1.POM

<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><parent><groupId>com.test.demo</groupId><artifactId>nacos-demo</artifactId><version>1.0-SNAPSHOT</version></parent><artifactId>backend-service</artifactId><packaging>jar</packaging><name>backend-service</name><url>http://maven.apache.org</url><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency></dependencies>
</project>

2. Java代码

启动类

@SpringBootApplication
@EnableDiscoveryClient
public class BackendApplication {public static void main(String[] args) {SpringApplication.run(BackendApplication.class);}
}

服务端代码，提供正常的rest风格的接口即可。

3. Yaml

server:port: 12221
spring:cloud:nacos:discovery:server-addr: localhost:8848application:name: backend-service

三、客户端

1.POM

<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><parent><groupId>com.test.demo</groupId><artifactId>nacos-demo</artifactId><version>1.0-SNAPSHOT</version></parent><artifactId>front-service</artifactId><packaging>jar</packaging><name>front-service</name><url>http://maven.apache.org</url><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><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></dependencies>
</project>

2.Java代码

启动类

@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
public class FrontApplication {public static void main(String[] args) {SpringApplication.run(FrontApplication.class);}
}

定义Feign客户端

@FeignClient(name="backend-service")  // 与服务名相同
public interface FeignTestClient {@GetMapping("/listUsers/")void listUsers();
}

入口

@RestController
@RequestMapping("/api")
public class FeignController {@Autowiredprivate FeignTestClient feignTestClient;@GetMapping("/testListUsers")public void testListUsers() {feignTestClient.listUsers();}
}

3. Yaml

server:port: 12222
spring:cloud:nacos:discovery:server-addr: localhost:8848application:name: front-service

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