使用dubbo调用服务

创建服务提供者

1.创建服务接口并编写实现类
2.导入jar包,这里使用maven导入

<dependencies>  
	<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>dubbo</artifactId>
			<version>2.6.5</version>
		</dependency>

		<dependency>
			<groupId>io.netty</groupId>
			<artifactId>netty-all</artifactId>
			<version>4.0.23.Final</version>
		</dependency>
<dependency>
			<groupId>com.101tec</groupId>
			<artifactId>zkclient</artifactId>
			<version>0.11</version>
		</dependency>
		<dependency>
			<groupId>org.apache.curator</groupId>
			<artifactId>curator-recipes</artifactId>
			<version>4.0.1</version>
		</dependency>
	</dependencies>

3.编写服务配置文件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://dubbo.apache.org/schema/dubbo"
	xsi:schemaLocation="http://www.springframework.org/schema/beans   
         http://www.springframework.org/schema/beans/spring-beans-4.3.xsd   
              http://dubbo.apache.org/schema/dubbo      
                http://dubbo.apache.org/schema/dubbo/dubbo.xsd">

	<!-- 提供方应用信息，用于计算依赖关系 -->
	<dubbo:application name="provider" />
<!--以下是三种提供服务的方式-->
	<!-- ------------------------------------------------------------------------------------------------------------------ -->
	<!-- 使用multicast广播注册中心暴露服务地址 -->
	<!-- <dubbo:registry address="multicast://224.5.6.7:1234" /> -->
<!-- 	本地模式,即服务方与消费方在同一台电脑上 -->
	<!-- <dubbo:registry address="N/A" /> -->
<!-- 	zookeeper注册服务,推荐使用 -->
	<!-- <dubbo:registry address="zookeeper://192.168.127.99:2181?backup=192.168.127.99:2182,192.168.127.99:2183" /> -->
	<dubbo:registry protocol="zookeeper" address="192.168.127.99:2181,192.168.127.99:2182,192.168.127.99:2183" />
	<!-- ------------------------------------------------------------------------------------------------------------------ -->
	<!-- 用dubbo协议在20880端口暴露服务 -->
	<dubbo:protocol name="dubbo" port="20880" />

	<!-- 声明需要暴露的服务接口 -->
	<dubbo:service interface="cn.demoService.DemoService"
		ref="demoService" />

	<!-- 和本地bean一样实现服务 -->
	<bean id="demoService" class="cn.demoService.impl.DemoServiceImpl" />
</beans>

项目结构如下

创建测试服务类

public static void main(String[] args)  {
 	ApplicationContext ac = new ClassPathXmlApplicationContext("provider.xml");
 	try {
 		System.in.read();
 	} catch (IOException e) {
 		// TODO Auto-generated catch block
 		e.printStackTrace();
 	}

 }

消费方

1.创建与服务方相同的接口,包名也应该相同
2.创建消费方xml配置文件

<?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://dubbo.apache.org/schema/dubbo"
	xsi:schemaLocation="http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans-4.3.xsd        http://dubbo.apache.org/schema/dubbo        http://dubbo.apache.org/schema/dubbo/dubbo.xsd">

	<!-- 消费方应用名，用于计算依赖关系，不是匹配条件，不要与提供方一样 -->
	<dubbo:application name="providerss" />

	<!-- 使用multicast广播注册中心暴露发现服务地址 -->
	<!-- <dubbo:registry address="multicast://224.5.6.7:1234" /> -->
<!-- 	<dubbo:registry address="zookeeper://192.168.127.99:2181?backup=192.168.127.99:2182,192.168.127.99:2183" /> -->
<!--zookeeper集群-->
      <dubbo:registry protocol="zookeeper" address="192.168.127.99:2181,192.168.127.99:2182,192.168.127.99:2183" />
      <!--zookeeper不集群-->
<!-- 	<dubbo:registry address="zookeeper://192.168.127.99:2181" /> -->

	<!-- 生成远程服务代理，可以和本地bean一样使用demoService -->
	<!--使用本地-->
	<!-- <dubbo:reference id="demoService" interface="cn.customer.DemoService" -->
	<!-- url="127.0.0.1:20880" /> -->
	<!--使用zookeeper或广播提供服务-->
	<dubbo:reference id="demoService1" check="false"
		interface="cn.demoService.DemoService"  />
</beans>

项目路径

创建测试消费类

public class TestMain {

	public static void main(String[] args) {
		ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext("customer.xml");
		ac.start();
		DemoService demoService = (DemoService) ac.getBean("demoService1");
		String hello = demoService.getUser("world"); // 执行远程方法
		System.out.println(hello); // 显示调用结果
	}
}