Dubbo RPC框架入门实例完整操作，轻松入门

1、准备Dubbo的开发环境，包括Java，Maven，EclipseApache Maven 3.5.2Maven home: E:\apache-maven-3.5.2\bin\..Java version: 1.8.0_151, vendor: Oracle CorporationJava home: C:\Program Files\Java\jdk1.8.0_151\jre

2、Dubbo入门实例规划1）使用Maven构建工程2）工程1：服务提供者，如test.love3）工程2：服务消费者，如 love.comsumer

3、构建工程1基本框架：服务提供者 ，需要在maven工程文件pom.xml中加入dubbo的依赖，dubbo版本号选2.5.8.Group ID: testartifact Id: lovepom.xml文件内容如下：<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>test</groupId> <artifactId>love</artifactId> <version>0.0.1-SNAPSHOT</version><dependencies><dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.5.8</version></dependency></dependencies></project>

4、在工程1中，创建服务提供接口和实现类1）DemoService.java 文件package love;public interface DemoService { String sayHello(String name);}2)DemoServiceImpl.java文件package love;public class DemoServiceImpl implements DemoService { public String sayHello(String name) { return "Hello " + name; }}3)Lover.java文件package love;import java.io.IOException;import org.springframework.context.support.ClassPathXmlApplicationContext;public class Lover { public static void main(String[] args) throws IOException { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( new String[] {"META/spring/dubbo-demo-provider.xml"}); context.start(); // press any key to exit System.in.read(); }}4）dubbo-spring服务配置文件META/spring/dubbo-demo-provider.xml<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"> <dubbo:application name="demo-provider"/> <dubbo:registry address="multicast://224.5.6.7:1234"/> <dubbo:protocol name="dubbo" port="20880"/> <dubbo:service interface="love.DemoService" ref="demoService"/> <bean id="demoService" class="love.DemoServiceImpl"/></beans>

5、创建工程2基本结构，在maven的工程文件pom.xml文件中增加对dubbo和工程1的依赖<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>love</groupId> <artifactId>comsumer</artifactId> <version>0.0.1-SNAPSHOT</version> <dependencies><dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.5.8</version></dependency><dependency> <groupId>test</groupId> <artifactId>love</artifactId> <version>0.0.1-SNAPSHOT</version></dependency> </dependencies></project>

6、在工程2中实现服务消费的功能1）Consumer.java文件package consumer;import org.springframework.context.support.ClassPathXmlApplicationContext;import love.DemoService;public class Consumer { public static void main(String[] args) { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( new String[]{"META/spring/dubbo-demo-consumer.xml"}); context.start(); // obtain proxy object for remote invocation DemoService demoService = (DemoService) context.getBean("demoService"); // execute remote invocation String hello = demoService.sayHello("world"); // show the result System.out.println(hello); }}2）spring服务配置文件 META/spring/dubbo-demo-consumer.xml<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"> <dubbo:application name="demo-consumer"/> <dubbo:registry address="multicast://224.5.6.7:1234"/> <dubbo:reference id="demoService" interface="love.DemoService"/></beans>

7、启动工程1：服务提供者，开启服务运行工程1的lover类，看到如下日志信息表示启动成功十二月 29, 2017 11:06:18 上午 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@1099f62: startup date [Fri Dec 29 11:06:18 CST 2017]; root of context hierarchy十二月 29, 2017 11:06:18 上午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions信息: Loading XML bean definitions from class path resource [META/spring/dubbo-demo-provider.xml]十二月 29, 2017 11:06:18 上午 com.alibaba.dubbo.common.logger.LoggerFactory info信息: using logger: com.alibaba.dubbo.common.logger.jcl.JclLoggerAdapter十二月 29, 2017 11:06:18 上午 com.alibaba.dubbo.config.AbstractConfig info信息: [DUBBO] The service ready on spring started. service: love.DemoService, dubbo version: 2.5.8, current host: 127.0.0.1十二月 29, 2017 11:06:19 上午 com.alibaba.dubbo.config.AbstractConfig info信息: [DUBBO] Export dubbo service love.DemoService to local registry, dubbo version: 2.5.8, current host: 127.0.0.1

8、启动工程2：消费者服务运行consumer.java 类，可以看到日志输出服务调用的结果：“Hello world”信息: [DUBBO] Refer dubbo service love.DemoService from url multicast://224.5.6.7:1234/com.alibaba.dubbo.registry.RegistryService?anyhost=true&application=demo-consumer&check=false&dubbo=2.5.8&generic=false&interface=love.DemoService&methods=sayHello&pid=9036&register.ip=192.168.26.157&remote.timestamp=1514516779019&side=consumer&timestamp=1514517590228, dubbo version: 2.5.8, current host: 192.168.26.157Hello world十二月 29, 2017 11:19:50 上午 com.alibaba.dubbo.config.AbstractConfig info信息: [DUBBO] Run shutdown hook now., dubbo version: 2.5.8, current host: 192.168.26.157