一、pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>org.example</groupId><artifactId>dubbo-tripple</artifactId><version>1.0-SNAPSHOT</version><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><maven.compiler.source>1.8</maven.compiler.source><maven.compiler.target>1.8</maven.compiler.target><dubbo.version>3.1.8</dubbo.version></properties><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.13</version><scope>test</scope></dependency><dependency><groupId>org.apache.dubbo</groupId><artifactId>dubbo</artifactId><version>${dubbo.version}</version></dependency><dependency><groupId>org.apache.dubbo</groupId><artifactId>dubbo-dependencies-zookeeper-curator5</artifactId><type>pom</type><version>${dubbo.version}</version></dependency><dependency><groupId>com.google.protobuf</groupId><artifactId>protobuf-java</artifactId><version>3.19.4</version></dependency></dependencies><build><extensions><extension><groupId>kr.motd.maven</groupId><artifactId>os-maven-plugin</artifactId><version>1.6.1</version></extension></extensions><plugins><plugin><groupId>org.xolstice.maven.plugins</groupId><artifactId>protobuf-maven-plugin</artifactId><version>0.6.1</version><configuration><protocArtifact>com.google.protobuf:protoc:3.19.4:exe:${os.detected.classifier}</protocArtifact><protocPlugins><protocPlugin><id>dubbo</id><groupId>org.apache.dubbo</groupId><artifactId>dubbo-compiler</artifactId><version>${dubbo.version}</version><mainClass>org.apache.dubbo.gen.tri.Dubbo3TripleGenerator</mainClass></protocPlugin></protocPlugins></configuration><executions><execution><goals><goal>compile</goal></goals></execution></executions></plugin></plugins></build></project>

二、編寫通信接口

package cn.edu.tju;public interface Greeter {String sayHello(String name);
}

三、編寫接口的服務端實現：

package cn.edu.tju;public class GreeterImpl implements Greeter {@Overridepublic String sayHello(String name) {return "Hello," + name + "!";}
}

四、編寫服務端主類：

package cn.edu.tju;import org.apache.dubbo.common.constants.CommonConstants;
import org.apache.dubbo.config.ApplicationConfig;
import org.apache.dubbo.config.ProtocolConfig;
import org.apache.dubbo.config.RegistryConfig;
import org.apache.dubbo.config.ServiceConfig;
import org.apache.dubbo.config.bootstrap.DubboBootstrap;import java.io.IOException;public class MyDubboServer {public static void main(String[] args) throws IOException {ServiceConfig<Greeter> service = new ServiceConfig<>();service.setInterface(Greeter.class);service.setRef(new GreeterImpl());DubboBootstrap bootstrap = DubboBootstrap.getInstance();bootstrap.application(new ApplicationConfig("tri-pojo-server")).registry(new RegistryConfig("zookeeper://xx.xx.xx.xx:2181")).protocol(new ProtocolConfig(CommonConstants.TRIPLE, 50051)).service(service).start();System.out.println("Dubbo triple pojo server started");System.in.read();}
}

其中注冊中心為zookeeper 3.6.2
五、編寫客戶端主類：

package cn.edu.tju;import org.apache.dubbo.common.constants.CommonConstants;
import org.apache.dubbo.config.ApplicationConfig;
import org.apache.dubbo.config.ReferenceConfig;
import org.apache.dubbo.config.RegistryConfig;
import org.apache.dubbo.config.bootstrap.DubboBootstrap;public class MyDubboClient {public static void main(String[] args) {DubboBootstrap bootstrap = DubboBootstrap.getInstance();ReferenceConfig<Greeter> ref = new ReferenceConfig<>();ref.setInterface(Greeter.class);ref.setProtocol(CommonConstants.TRIPLE);ref.setTimeout(3000);bootstrap.application(new ApplicationConfig("tri-pojo-client")).registry(new RegistryConfig("zookeeper://xx.xx.xx.xx:2181")).reference(ref).start();Greeter greeter = ref.get();String reply = greeter.sayHello("pojo");System.out.println("Received reply:" + reply);}
}

分別運行客戶端和服務器：


也可以在src/main/proto目錄下創建.proto文件，

syntax = "proto3";option java_multiple_files = true;
option java_package = "com.example";
option java_outer_classname = "HelloWorldProto";
option objc_class_prefix = "HLW";package helloworld;message HelloRequest {string name = 1;
}message HelloReply {string message = 1;
}
service Greeter{rpc greet(HelloRequest) returns (HelloReply);
}

然后使用compile生成接口定義文件

然后將生成的java代碼拷貝到src下，再編寫接口實現文件以及服務端主類和客戶端主類，這種方式實際是使用了grpc進行了通信。