下载示例代码
完整示例代码在 dubbo-samples 中。
下载源码git clone -b master https://github.com/apache/dubbo-samples.git进入示例目录cd dubbo-samples/1-basic/dubbo-samples-spring-bootls # 查看目录结构快速运行示例编译 Provider在 dubbo-samples-spring-boot 目录执行 maven 命令mvn clean package运行 Provider进入 dubbo-samples-spring-boot-provider/target 目录并启动 java 进程cd ./dubbo-samples-spring-boot-providerjava -jar ./target/dubbo-samples-spring-boot-provider-1.0-SNAPSHOT.jar运行 consumer进入 dubbo-samples-spring-boot-consumer 目录并启动 java 进程java -jar ./target/dubbo-samples-spring-boot-consumer-1.0-SNAPSHOT.jar查看结果在 consumer 侧会输出如下信息：result: Hello World
在 provider 侧会输出如下信息：
Hello World, request from consumer: xxx.xxx.xxx.xxx
至此就把 Dubbo 的基本功能都实现了，可以在 Dubbo 的基础上进行更多的开发。
示例核心流程
关于示例的更详细解读可参见 注解配置
1. 定义服务接口
dubbo-samples-spring-boot-interface/DemoService.java
package org.apache.dubbo.samples.basic.api;public interface DemoService { String sayHello(String name);}2. 提供方实现接口并暴露服务
dubbo-samples-spring-boot-provider/DemoServiceImpl.java
@DubboServicepublic class DemoServiceImpl implements DemoService { @Override public String sayHello(String name) { System.out.println("Hello " + name + ", request from consumer: " + RpcContext.getContext().getRemoteAddress()); return "Hello " + name; }}3. 配置 application.yml 文件
dubbo-samples-spring-boot-provider/resources/application.yml
dubbo: application: name: dubbo-springboot-demo-provider protocol: name: dubbo port: -1 registry: id: zk-registry address: zookeeper://127.0.0.1:2181 config-center: address: zookeeper://127.0.0.1:2181 metadata-report: address: zookeeper://127.0.0.1:21814. 定义 Spring Boot 主函数
dubbo-samples-spring-boot-provider/ProviderApplication.java
@SpringBootApplication@EnableDubbopublic class ProviderApplication { public static void main(String[] args) throws Exception { new EmbeddedZooKeeper(2181, false).start(); SpringApplication.run(ProviderApplication.class, args); System.out.println("dubbo service started"); new CountDownLatch(1).await(); }}
其中，@EnableDubbo 必须配置。
5. 引用远程服务
dubbo-samples-spring-boot-consumer/ConsumerApplication.java
public class ConsumerApplication { @DubboReference private DemoService demoService;}6. 定义 application.yml
dubbo-samples-spring-boot-consumer/application.yml
dubbo: application: name: dubbo-springboot-demo-consumer protocol: name: dubbo port: -1 registry: id: zk-registry address: zookeeper://127.0.0.1:2181 config-center: address: zookeeper://127.0.0.1:2181 metadata-report: address: zookeeper://127.0.0.1:21817. 加载 Spring 配置，并调用远程服务
dubbo-samples-spring-boot-consumer/ConsumerApplication.java
@SpringBootApplication@Service@EnableDubbopublic class ConsumerApplication { @DubboReference private DemoService demoService; public String doSayHello(String name) { return demoService.sayHello(name); } public static void main(String[] args) { ConfigurableApplicationContext context = SpringApplication.run(ConsumerApplication.class, args); ConsumerApplication application = context.getBean(ConsumerApplication.class); String result = application.doSayHello("world"); System.out.println("result: " + result); }}
其中，@EnableDubbo 必须配置。
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