dubbo-helloworld示例

1、工程架构

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2、创建模块

（1）创建父工程,引入公共依赖
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pom.xml依赖

<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>com.alibaba.boot</groupId><artifactId>dubbo-spring-boot-starter</artifactId><version>0.2.0</version></dependency>
</dependencies>

（2）创建common：公共接口模块（model，service，exception…）
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作用：定义公共接口，也可以导入公共依赖

public interface UserService {public String sayHello(String name);
}

（3）创建dubbo_provider子模块：生产者模块（对用户接口的实现）
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1）pom.xml

<dependencies><dependency><groupId>com.atguigu</groupId><artifactId>common</artifactId><version>0.0.1-SNAPSHOT</version></dependency>
</dependencies>

2）Service

import com.alibaba.dubbo.config.annotation.Service;
import com.atguigu.common.UserService;
import org.springframework.stereotype.Component;@Service //这个注解是dubbo的注解，表示对外暴露可以调用的接口
public class UserServiceImpl implements UserService {public String sayHello(String name) {return "hello:"+name;}
}

3）创建启动类

@EnableDubbo  //这个注解表示开启dubbo的注解扫描
@SpringBootApplication
public class ProApplication {public static void main(String[] args) {SpringApplication.run(ProApplication.class, args);}
}

4）创建application.properties

dubbo.application.name=service-provide
dubbo.registry.address=192.168.200.130:2181
#dubbo.registry.address=zookeeper://192.168.200.130:2191?backup=192.168.200.130:2192,192.168.200.130:2193dubbo.registry.protocol=zookeeperdubbo.protocol.name=dubbo
dubbo.protocol.port=20881

（4）创建dubbo_consumer子模块：消费者模块（调用生产者模块）
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1）pom.xml

<dependencies><dependency><groupId>com.atguigu</groupId><artifactId>common</artifactId><version>0.0.1-SNAPSHOT</version></dependency>
</dependencies>

2）创建controller，调用生产者

@RestController
@RequestMapping("/user")
public class UserController {@Reference  //这个注解表示远程调用dubboprivate UserService userService;@GetMapping("{name}")public String getData(@PathVariable String name) {String value = userService.sayHello(name);return value;}
}

3）创建启动类

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

4）创建application.properties配置文件

server.port=8081
dubbo.application.name=boot-order-service-consumer
dubbo.registry.address=zookeeper://192.168.200.130:2181
#dubbo.registry.address=zookeeper://192.168.200.129:2191?backup=192.168.200.129:2192,192.168.200.129:2193