dubbo用法，配置

服务提供者：

          定义服务接口: (该接口需单独打包，在服务提供方和消费方共享)

public interface DemoService {        String sayHello(String name);   } 在服务提供方实现接口：(对服务消费方隐藏实现) public class DemoServiceImpl implements DemoService {        public String sayHello(String name) {           return "Hello " + name;      }   } 用spring配置声明暴露服务

<? 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" >

<!-- 提供方应用信息，用于计算依赖关系 -->      < dubbo:application name = "hello-world-app"  />        <!-- 使用multicast广播注册中心暴露服务地址 -->      < dubbo:registry address = "multicast://224.5.6.7:1234" />        <!-- 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 = "com.alibaba.dubbo.demo.DemoService" ref = "demoService" />        <!-- 和本地bean一样实现服务 -->      < bean id = "demoService" class = "com.alibaba.dubbo.demo.provider.DemoServiceImpl" />   </ beans > 加载spring配置 import org.springframework.context.support.ClassPathXmlApplicationContext;   public class Provider {        public static void main(String[] args) throws Exception {          ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( new String[] { "<a href="http://10.20.160.198/wiki/display/dubbo/provider.xml" "="" style="outline: none; text-decoration: none; border-radius: 0px !important; background: none !important; border: 0px !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; line-height: 1.2em !important; margin: 0px !important; overflow: visible !important; padding: 0px !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; width: auto !important; box-sizing: content-box !important; font-size: 1em !important; min-height: auto !important; color: rgb(0, 51, 102) !important;">http://10.20.160.198/wiki/display/dubbo/provider.xml" });          context.start();            System.in.read(); // 按任意键退出      }   } import org.springframework.context.support.ClassPathXmlApplicationContext;   public class Provider {        public static void main(String[] args) throws Exception {          ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( new String[] { "<a href="http://10.20.160.198/wiki/display/dubbo/provider.xml" "="" style="outline: none; text-decoration: none; border-radius: 0px !important; background: none !important; border: 0px !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; line-height: 1.2em !important; margin: 0px !important; overflow: visible !important; padding: 0px !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; width: auto !important; box-sizing: content-box !important; font-size: 1em !important; min-height: auto !important; color: rgb(0, 51, 102) !important;">http://10.20.160.198/wiki/display/dubbo/provider.xml" });          context.start();            System.in.read(); // 按任意键退出      }   } import org.springframework.context.support.ClassPathXmlApplicationContext;   public class Provider {        public static void main(String[] args) throws Exception {          ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( new String[] { "<a href="http://10.20.160.198/wiki/display/dubbo/provider.xml" "="" style="outline: none; text-decoration: none; border-radius: 0px !important; background: none !important; border: 0px !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; line-height: 1.2em !important; margin: 0px !important; overflow: visible !important; padding: 0px !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; width: auto !important; box-sizing: content-box !important; font-size: 1em !important; min-height: auto !important; color: rgb(0, 51, 102) !important;">http://10.20.160.198/wiki/display/dubbo/provider.xml" });          context.start();            System.in.read(); // 按任意键退出      }   } 服务消费者： 通过Spring配置引用远程服务： <? 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" >        <!-- 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 = "consumer-of-helloworld-app"  />        <!-- 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" />        <!-- 生成远程服务代理，可以和本地bean一样使用demoService -->      < dubbo:reference id = "demoService" interface = "com.alibaba.dubbo.demo.DemoService" />   </ beans > 加载Spring配置，并调用远程服务：(也可以使用IoC注入) import org.springframework.context.support.ClassPathXmlApplicationContext; import com.alibaba.dubbo.demo.DemoService;   public class Consumer {        public static void main(String[] args) throws Exception {          ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( new String[] { "http://10.20.160.198/wiki/display/dubbo/consumer.xml" });          context.start();            DemoService demoService = (DemoService)context.getBean( "demoService" ); // 获取远程服务代理          String hello = demoService.sayHello( "world" ); // 执行远程方法            System.out.println( hello ); // 显示调用结果      }   } 具体内容：去http://dubbo.io/User+Guide-zh.htm