dubbo3-01.helloworld

项目结构

- dubbo-examples- consumer-service- provider-interface- provider-service

pom 文件

dubbo-examples 的 pom.xml

<dependencyManagement>  <dependencies>  <dependency>  <groupId>org.springframework.boot</groupId>  <artifactId>spring-boot-dependencies</artifactId>  <version>${spring.boot.version}</version>  <type>pom</type>  <scope>import</scope>  </dependency>  <dependency>  <groupId>org.springframework.cloud</groupId>  <artifactId>spring-cloud-dependencies</artifactId>  <version>${spring.cloud.version}</version>  <type>pom</type>  <scope>import</scope>  </dependency>  <dependency>  <groupId>com.alibaba.cloud</groupId>  <artifactId>spring-cloud-alibaba-dependencies</artifactId>  <version>${spring.cloud.alibaba.version}</version>  <type>pom</type>  <scope>import</scope>  </dependency>  <dependency>  <groupId>org.apache.dubbo</groupId>  <artifactId>dubbo-bom</artifactId>  <version>${dubbo.version}</version>  <type>pom</type>  <scope>import</scope>  </dependency>  <dependency>  <groupId>org.example</groupId>  <artifactId>provider-interface</artifactId>  <version>${project.version}</version>  </dependency>  <dependency>  <groupId>com.google.guava</groupId>  <artifactId>guava</artifactId>  <version>${guava.version}</version>  </dependency>  <dependency>  <groupId>org.apache.commons</groupId>  <artifactId>commons-lang3</artifactId>  <version>${commons-lang3.version}</version>  </dependency>  </dependencies>  
</dependencyManagement>

consumer 和 provider 的 pom.xml

两者的 pom.xml 是一样的

<dependencies>  <dependency>  <groupId>org.springframework.boot</groupId>  <artifactId>spring-boot-starter-web</artifactId>  </dependency>  <!-- Registry 注册中心相关 -->  <dependency>  <groupId>com.alibaba.cloud</groupId>  <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>  </dependency>  <!-- Dubbo -->  <dependency>  <groupId>org.apache.dubbo</groupId>  <artifactId>dubbo-spring-boot-starter</artifactId>  </dependency>  <dependency>  <groupId>org.apache.dubbo</groupId>  <artifactId>dubbo-registry-nacos</artifactId>  </dependency>  <dependency>  <groupId>org.example</groupId>  <artifactId>provider-interface</artifactId>  </dependency>  <dependency>  <groupId>com.google.guava</groupId>  <artifactId>guava</artifactId>  </dependency>  <dependency>  <groupId>org.apache.commons</groupId>  <artifactId>commons-lang3</artifactId>  </dependency>  
</dependencies>

代码

provider-interface

provider-service 暴露的 API 接口定义

package org.example.dubbo.service;  public interface ProvideService {  String hello(String name);  
}

provider-service

ProviderApp

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

ProviderServiceImpl - dubbo 接口实现

@Component  
@DubboService  // dubbo 接口实现
public class ProviderServiceImpl implements ProvideService {  @Override  public String hello(String name) {  return "hello, " + name + "!";  }  }

配置文件

server:  port: 8080  
spring:  application:  name: dubbo-provider  cloud:  nacos:  server-addr: localhost:8848  discovery:  namespace: local # 命名空间  
dubbo:  application:  id: ${spring.application.name}  name: ${spring.application.name}  protocol:  name: dubbo  port: -1  registry:  # 使用了 nacos 作为注册中心address: nacos://localhost:8848  check: false  scan:  base-packages: org.example.dubbo.service

consumer -service

web

package org.example.dubbo.web;  import org.apache.dubbo.config.annotation.DubboReference;  
import org.example.dubbo.service.ProvideService;  
import org.springframework.web.bind.annotation.GetMapping;  
import org.springframework.web.bind.annotation.RequestMapping;  
import org.springframework.web.bind.annotation.RequestParam;  
import org.springframework.web.bind.annotation.RestController;  @RestController  
@RequestMapping("/consumer")  
public class ConsumerApi {  @DubboReference(check = false)  private ProvideService providerService;  @GetMapping("/hello")  public String hello(@RequestParam String name) {  return providerService.hello(name);  }  }

配置文件

server:  port: 8081  
spring:  application:  name: dubbo-consumer  cloud:  nacos:  server-addr: localhost:8848  discovery:  namespace: local  
dubbo:  application:  name: ${spring.application.name}  logger: slf4j  registry:  # 使用了 nacos 作为注册中心address: nacos://localhost:8848  port: -1  check: false

启动和结果演示

启动顺序: nacos, provider-service, consumer-service

GET http://localhost:8081/consumer/hello?name=dubboHTTP/1.1 200 
Content-Type: text/plain;charset=UTF-8
Content-Length: 13
Date: Mon, 22 Apr 2024 07:48:06 GMT
Keep-Alive: timeout=60
Connection: keep-alivehello, dubbo!Response code: 200; Time: 188ms (188 ms); Content length: 13 bytes (13 B)