nacos学习-----服务发现和调用

原创已于 2022-04-04 13:24:37 修改 · 497 阅读

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#分布式

于 2022-04-04 13:22:02 首次发布

本文介绍了如何使用Spring Boot和阿里巴巴云的Spring Cloud Alibaba Nacos进行服务注册与发现，展示了生产者和消费者模块的配置、依赖管理和接口调用，适合理解和实践微服务架构。

父工程

<dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>2.4.10</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>2020.0.4</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2021.1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

生产者-模块
pom.xml

 <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>
    </dependencies>

application.yml

server:
  port: 8080
spring:
  application:
    name: provider1   #提供者服务名
  cloud:
    nacos:
      discover:
        server-addr: 127.0.0.1:8848
      discovery:
        namespace: 604b4744-bee9-446a-9273-b17db30c8965   #开发环境命名空间
        group: TEST_GROUP

controller.java

@RestController
public class ProviderController {

    @GetMapping("/sayHi")
    public  String sayHi(){
        return "hello provider";
    }
}

启动类

@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
public class ProviderApplication {

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

nacos 图形界面查看服务注册
在这里插入图片描述
消费者–模块
pom.xml

 <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>
            <exclusions>
                <exclusion>
                    <groupId>com.netflix.ribbon</groupId>
                    <artifactId>ribbon</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-loadbalancer</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
    </dependencies>

application.yml

server:
  port: 8081
spring:
  application:
    name: consumber   #消费者服务名
  cloud:
    nacos:
      discover:
        server-addr: 127.0.0.1:8848
      discovery:
        namespace: 604b4744-bee9-446a-9273-b17db30c8965  #开发环境namespace
        group: TEST_GROUP

接口：

@FeignClient("provider1")
public interface ProviderClient {
    @GetMapping("/sayHi")
    public String sayHi();
}

controller.java

@RestController
public class ConsumberController {
    @Autowired
    private ProviderClient providerClient ;
    
    @GetMapping("/client")
    public  String client(){
        return providerClient.sayHi();
    }
}

启动类：

@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
public class ConsumberApplication {

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