所需環境

開始搭建

1. 服務提供方和消費方都需要的包（這裡我新建的maven工程為pom工程，將共同的專案依賴寫到pom.xml中）

• 總的專案結構為
  

• pom.xml檔案內容為

<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.test</groupId>
  <artifactId>dubbo-demo</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>pom</packaging>

   <properties>
        <motan.version>0.3.0</motan.version>
        <!-- 在阿里巴巴內部廣泛使用的GA版本為：2.4.9，強烈推薦此版本 -->
 

        <dubbo.version>2.5.3</dubbo.version>
        <dubbox.version>2.8.4</dubbox.version>
        <spring.version>4.3.6.RELEASE</spring.version>
        <java.version>1.7</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding
 
>
    </properties>

    <dependencies>
      <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.5.3</version>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.github.sgroschupf</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.1</version>
        </dependency>
        <!-- spring相關 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jms</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.6.11</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.6.11</version>
        </dependency>
    </dependencies>
   <modules>
    <module>demo-api</module>
    <module>dubbo-consumer</module>
    <module>dubbo-provider</module>
   </modules>
</project>

2. 在demo-api中定義服務介面（注意服務提供方和消費方都需要依賴這個專案）

package com.test;

public interface DemoService{  
     String sayHello(String name);  
} 

3. 服務提供方實現

• 專案結構
  
• 實現介面

package com.test;
import org.springframework.stereotype.Service;

import com.test.DemoService;
@Service("demoService")
public class DemoServiceImpl implements DemoService{

    @Override
    public String sayHello(String name) {
        // TODO Auto-generated method stub
        return name; 
    }  
}

• 宣告暴露服務：

<?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">

    <!-- 提供方應用資訊，用於計算依賴關係 -->  
    <dubbo:application name="dubbo_provider"  />  

    <!-- 使用zookeeper註冊中心暴露服務地址 -->  
    <dubbo:registry address="zookeeper://127.0.0.1:2181" />   

    <!-- 用dubbo協議在20880埠暴露服務 -->  
    <dubbo:protocol name="dubbo" port="20880" />  

    <!-- 宣告需要暴露的服務介面 -->  
    <dubbo:service interface="com.test.DemoService" ref="demoService" />  
</beans>

• 在springmvc.xml中掃描service註解並將dubbo-provider.xml中的相關的dubbo配置引入進來

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:util="http://www.springframework.org/schema/util" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/aop   
        http://www.springframework.org/schema/aop/spring-aop-4.0.xsd   
        http://www.springframework.org/schema/beans   
        http://www.springframework.org/schema/beans/spring-beans-4.0.xsd   
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.0.xsd   
        http://www.springframework.org/schema/util 
        http://www.springframework.org/schema/util/spring-util-4.0.xsd"
    default-autowire="byName">

    <aop:aspectj-autoproxy />
    <context:component-scan base-package="com.test" />
    <import resource="classpath:dubbo-provider.xml" />
</beans>

• 載入Spring配置，啟動服務：

package com.test;

import java.io.IOException;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test {
    public static void main(String[] args) throws Exception {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("classpath:springmvc.xml");
        context.start();

        System.out.println("Dubbo provider start...");

        try {
            System.in.read();   // 按任意鍵退出
        } catch (IOException e) {
            e.printStackTrace();
        } 
    }
}

4. 服務消費者實現

• 專案結構
  
• 在dubbo-consumer.xml中宣告所所需要消費的服務

<?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 ">          
    <!-- 消費方應用名，用於計算依賴關係，不是匹配條件，不要與提供方一樣 -->    
    <dubbo:application name="dubbo_consumer" />       
      <!-- 使用multicast廣播註冊中心暴露發現服務地址 -->    
    <dubbo:registry  protocol="zookeeper" address="zookeeper://127.0.0.1:2181" />         
      <!-- 生成遠端服務代理，可以和本地bean一樣使用demoService -->    
    <dubbo:reference id="demoService" interface="com.test.DemoService" />    
</beans>   

• 在springmvc.xml中掃描service註解並將dubbo-consumer.xml中的相關的dubbo配置引入進來

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:util="http://www.springframework.org/schema/util" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/aop   
        http://www.springframework.org/schema/aop/spring-aop-4.0.xsd   
        http://www.springframework.org/schema/beans   
        http://www.springframework.org/schema/beans/spring-beans-4.0.xsd   
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.0.xsd   
        http://www.springframework.org/schema/util 
        http://www.springframework.org/schema/util/spring-util-4.0.xsd"
    default-autowire="byName">

    <aop:aspectj-autoproxy />
    <context:component-scan base-package="com.test" />
    <import resource="classpath:/dubbo-consumer.xml" />
</beans>

• 載入Spring配置，呼叫服務：

package com.test;

import java.io.IOException;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test {
    public static void main(String[] args) {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] { "classpath:springmvc.xml" });

        context.start();
        DemoService demoService = (DemoService) context.getBean("demoService");

        System.out.println(demoService.sayHello("哈哈哈"));
        try {
            System.in.read();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}