准备：先安装zookeeper，然后进入一下步骤

服务端

1.新建 maven项目

2.pom.xml 内容如下

<?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>com.demo</groupId>

    <artifactId>test</artifactId>

    <version>1.0-SNAPSHOT</version>

    <dependencies>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-context</artifactId>

            <version>4.2.6.RELEASE</version>

        </dependency>

        <dependency>

            <groupId>com.alibaba</groupId>

            <artifactId>dubbo</artifactId>

            <version>2.5.3</version>

        </dependency>

        <dependency>

            <groupId>com.101tec</groupId>

            <artifactId>zkclient</artifactId>

            <version>0.9</version>

        </dependency>

    </dependencies>

</project>

3.在resource里新建 applicationContext.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

        ">

    <!-- 具体的实现bean -->

    <bean id="animalService"

          class="com.dubbo.controller.Animal" />

    <!-- 提供方应用信息，用于计算依赖关系 -->

    <dubbo:application name="anyname_provider" />

    <!-- 使用zookeeper注册中心暴露服务地址 -->

    <dubbo:registry address="zookeeper://127.0.0.1:2181" />

    <!-- 用dubbo协议在20880端口暴露服务 -->

    <dubbo:protocol name="dubbo" port="20881" />

    <!-- 声明需要暴露的服务接口 -->

    <dubbo:service interface="com.dubbo.controller.IAnimal"

                   ref="animalService" />

</beans>

4.新建IAnimal接口

package com.dubbo.controller;

public interface IAnimal {

    public  String say();

}

5.IAnimal接口的实现

package com.dubbo.controller;

import com.dubbo.controller.IAnimal;

public class Animal implements IAnimal {

    public  String say(){

        return  "i am say 1";

    }

}

6.启动该应用（会注册到zookeeper）

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test1 {

    public static void main(String[] args) throws Exception {

        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"applicationContext.xml"});

        context.start();

        System.out.println(" app run ");

        System.in.read(); // 按任意键退出

    }

}

启动后显示“ app run ” 则表示启动成功

客户端

1.新建maven 项目 dubbo-controller

2.pom.xml

<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>com.dubbo</groupId>

  <artifactId>dubbo-controller</artifactId>

  <version>0.0.1-SNAPSHOT</version>

  <packaging>war</packaging>

  <name>dubbo-contoller</name>

  <url>http://maven.apache.org</url>

  <properties>

    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

    <!-- 设置 Spring 的版本 -->

    <org.springframework.version>3.1.4.RELEASE</org.springframework.version>

  </properties>

  <dependencies>

    <dependency>

          <groupId>junit</groupId>

          <artifactId>junit</artifactId>

          <version>3.8.1</version>

          <scope>test</scope>

    </dependency>

    <dependency>

        <groupId>javax.servlet</groupId>

            <artifactId>javax.servlet-api</artifactId>

            <version>3.1.0</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-context</artifactId>

            <version>${org.springframework.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-context-support</artifactId>

            <version>${org.springframework.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-web</artifactId>

            <version>${org.springframework.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-webmvc</artifactId>

            <version>${org.springframework.version}</version>

        </dependency>

        <!-- json start -->

        <dependency>

            <groupId>org.codehaus.jackson</groupId>

            <artifactId>jackson-core-asl</artifactId>

            <version>1.9.12</version>

        </dependency>

        <dependency>

            <groupId>org.codehaus.jackson</groupId>

            <artifactId>jackson-mapper-asl</artifactId>

            <version>1.9.12</version>

        </dependency>

        <dependency>

            <groupId>net.sf.json-lib</groupId>

            <artifactId>json-lib</artifactId>

            <version>2.4</version>

            <classifier>jdk15</classifier>

        </dependency>

        <!--json end -->

        <!-- dubbo start -->

        <dependency>

            <groupId>com.alibaba</groupId>

            <artifactId>dubbo</artifactId>

            <version>2.5.3</version>

            <exclusions>

                <exclusion>

                    <artifactId>spring</artifactId>

                    <groupId>org.springframework</groupId>

                </exclusion>

            </exclusions>

        </dependency>

        <dependency>

            <groupId>org.apache.zookeeper</groupId>

            <artifactId>zookeeper</artifactId>

            <version>3.3.6</version>

            <exclusions>

                <exclusion>

                    <groupId>log4j</groupId>

                    <artifactId>log4j</artifactId>

                </exclusion>

            </exclusions>

        </dependency>

        <dependency>

            <groupId>log4j</groupId>

            <artifactId>log4j</artifactId>

            <version>1.2.16</version>

        </dependency>

        <dependency>

          <groupId>com.github.sgroschupf</groupId>

          <artifactId>zkclient</artifactId>

          <version>0.1</version>

        </dependency>

        <!-- dubbo end -->

        <dependency>

            <groupId>com.dubbo</groupId>

              <artifactId>dubbo-api</artifactId>

              <version>0.0.1-SNAPSHOT</version>

        </dependency>

      </dependencies>

    <build>

        <finalName>dubbo-controller</finalName>

    </build>

</project>

3.新建 applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:context="http://www.springframework.org/schema/context"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"

    xsi:schemaLocation="http://www.springframework.org/schema/beans

        http://www.springframework.org/schema/beans/spring-beans.xsd

    http://www.springframework.org/schema/context

    http://www.springframework.org/schema/context/spring-context-3.0.xsd

    http://www.springframework.org/schema/mvc

    http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">

    <import resource="dubbo-config.xml" />

    <import resource="spring-mvc.xml" />

</beans>

4.新建dubbo-config.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"

       xmlns:context="http://www.springframework.org/schema/context"

       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 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

    <dubbo:application name="consumer_app" />

    <dubbo:registry address="zookeeper://127.0.0.1:2181" />

    <dubbo:consumer timeout="5000" />

    <dubbo:reference id="demoService"

                     interface="Provider" />

    <dubbo:reference id="animalService"

                     interface="com.dubbo.controller.IAnimal" />

</beans>

5.新建 spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:context="http://www.springframework.org/schema/context"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"

    xsi:schemaLocation="http://www.springframework.org/schema/beans

        http://www.springframework.org/schema/beans/spring-beans.xsd

    http://www.springframework.org/schema/context

    http://www.springframework.org/schema/context/spring-context-3.0.xsd

    http://www.springframework.org/schema/mvc

    http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">

    <context:component-scan base-package="com.dubbo" />

    <mvc:annotation-driven />

</beans>

6.新建接口 IAnimal

package com.dubbo.controller;

public interface IAnimal {

	 public  String say();

}

7.新建MyController

package com.dubbo.controller;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.bind.annotation.ResponseBody;

import com.dubbo.service.TestService;

/**

 * controller

 * @author hwy

 *

 */

@Controller

public class MyController {

    @Autowired

    private IAnimal testService;

    @RequestMapping(value = "/test")

    @ResponseBody

    public String testSay(@RequestParam(value = "name",defaultValue = "") String name){

        StringBuffer sb = new StringBuffer();

        sb.append("aaa123456789001");

    sb.append("Dubbo: ").append(testService.say());

        return sb.toString();

    }

}

8.web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"

         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"

         version="3.1">

    <display-name>dubbo-controller</display-name>

    <welcome-file-list>

        <welcome-file>index.html</welcome-file>

        <welcome-file>index.htm</welcome-file>

        <welcome-file>index.jsp</welcome-file>

    </welcome-file-list>

    <servlet>

        <servlet-name>dispatcher</servlet-name>

        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

        <init-param>

            <param-name>contextConfigLocation</param-name>

            <param-value>classpath:applicationContext.xml</param-value>

        </init-param>

        <load-on-startup>0</load-on-startup>

    </servlet>

    <servlet-mapping>

        <servlet-name>dispatcher</servlet-name>

        <url-pattern>/</url-pattern>

    </servlet-mapping>

</web-app>

在Tomcat里运行该应用

访问：http://127.0.0.1:8080/dubbo-controller/test?name=hwy

源码：https://pan.baidu.com/s/1miBt9Ja

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