最近在学习dubbo，构建一个简单的springboot集成dubbo，中间也是出了好多问题，在这记录下整体的过程。

1. 构建SpringBoot环境

一个简单的聚合工程

• dubbo-consumer：是服务消费方
• dubbo-provider：是服务提供方
• dubbo-interface：存放接口，因为dubbo是根据接口进行服务注册发现的，因此我们要把接口单独拿出来，provider提供方实现该接口并注册服务， consumer要根据接口进行注入

完整demo路径

2.dubbo-provider服务配置

2.1 引入依赖

 <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <version>2.3.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>2.3.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>3.0.7</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-dependencies-zookeeper</artifactId>
            <version>3.0.7</version>
            <type>pom</type>
        </dependency>
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>dubbo-service</artifactId>
            <version>1.0-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>dubbo-service</artifactId>
            <version>1.0-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>

2.2 application.yml 配置

server:
  port: 8081
dubbo:
  protocol:
    name: dubbo
    port: 20880
  registry:
    address: zookeeper://127.0.0.1:2181
  application:
    name: provider

2.3 配置启动类

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

这里注意@EnableDubbo

2.4 编写实现类

可以先实现下面的接口，回过头来写实现类

@DubboService
public class DemoServiceImpl implements DemoService {
    @Override
    public String getUsername(String name) {
        return "dubbo3新技术欢迎你 ！  "+name;
    }
}

这里注意@DubboService 因为这个注解缺失，demo一直报错

3.dubbo-service配置

3.1 编写接口

public interface DemoService {
    public String getUsername(String name);
}

4.dubbo-consumer配置

4.1 引入依赖

同上面的2.1 复制就好了

4.2 application.yml 配置

server:
  port: 8082
dubbo:
  registry:
    address: zookeeper://127.0.0.1:2181
  application:
    name: consumer

4.3 配置启动类

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

4.4 编写个接口，用来测试

@RestController
public class DemoController {
    @DubboReference
    private DemoService demoService;

    @GetMapping("/get/{username}")
    public String getUsername(@PathVariable String username) {
        return demoService.getUsername(username);
    }
}

注意这里的@DubboReference

5.测试

依此启动Zookeeper -> provider -> consumer

至此一个简单地springboot + dubbo + zookeeper 的demo就实现了，本来不打算写博客的，构建时中间一直出错，网上相关资料也不多，索性记录一下，后续有时间会用dubbo构建一个完整项目