本文章，主要描述了如何通过使用Dubbo，创建一个Hello World 项目

使用工具及软件版本

使用IDE：eclipse-neon

JDK：JDK1.8

Maven：3.3.3

SpringBoot：1.5.1.RELEASE

Zookeeper：3.4.10

需要创建三个Maven工程

springboot-dubbo-common：接口、通用类工程

springboot-dubbo-client：消费者工程

springboot-dubbo-server：提供者工程

项目创建时必须先在本机中或者其它设备中安装配置zookeeper并启动，启动之后再创建下面几个工程：

注：如果不知道zookeeper如何安装配置，请参照以下联接https://my.oschina.net/sdlvzg/blog/1305383

创建springboot-dubbo-common

在eclipse中创建一个maven项目

maven-archetype-quickstart

Group Id：org.spring.springboot

Artiface Id：springboot-dubbo-common

Package：org.spring.springboot

修改pom.xml文件

<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>org.spring.springboot</groupId><artifactId>springboot-dubbo-common</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>springboot-dubbo-common</name><url>http://maven.apache.org</url><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>3.8.1</version><scope>test</scope></dependency></dependencies>
</project>

创建实体类

package org.spring.springboot.domain;import java.io.Serializable;/*** 城市实体类** Created by bysocket on 07/02/2017.*/
public class City implements Serializable {private static final long serialVersionUID = -1L;public  City(Long id,Long provinceId,String cityName,String description){this.id = id;this.provinceId = provinceId;this.cityName = cityName;this.description =  description;}/*** 城市编号*/private Long id;/*** 省份编号*/private Long provinceId;/*** 城市名称*/private String cityName;/*** 描述*/private String description;public Long getId() {return id;}public void setId(Long id) {this.id = id;}public Long getProvinceId() {return provinceId;}public void setProvinceId(Long provinceId) {this.provinceId = provinceId;}public String getCityName() {return cityName;}public void setCityName(String cityName) {this.cityName = cityName;}public String getDescription() {return description;}public void setDescription(String description) {this.description = description;}@Overridepublic String toString() {return "City{" +"id=" + id +", provinceId=" + provinceId +", cityName='" + cityName + '\'' +", description='" + description + '\'' +'}';}
}

创建服务接口类

package org.spring.springboot.dubbo;import org.spring.springboot.domain.City;/*** 城市业务 Dubbo 服务层** Created by bysocket on 28/02/2017.*/
public interface CityDubboService {/*** 根据城市名称，查询城市信息* @param cityName*/City findCityByName(String cityName);
}

完成dubbo-api创建

创建springboot-dubbo-server

在eclipse中创建一个maven项目

maven-archetype-quickstart

Group Id：org.spring.springboot

Artiface Id：springboot-dubbo-server

Package：org.spring.springboot

修改pom.xml文件

<?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>springboot</groupId><artifactId>springboot-dubbo-server</artifactId><version>0.0.1-SNAPSHOT</version><name>springboot-dubbo 服务端:: 整合 Dubbo/ZooKeeper 详解 SOA 案例</name><!-- Spring Boot 启动父依赖 --><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.1.RELEASE</version></parent><properties><dubbo-spring-boot>1.0.0</dubbo-spring-boot></properties><dependencies><!-- Spring Boot Dubbo 依赖 --><dependency><groupId>io.dubbo.springboot</groupId><artifactId>spring-boot-starter-dubbo</artifactId><version>${dubbo-spring-boot}</version></dependency><!-- Spring Boot Web 依赖 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!-- Spring Boot Test 依赖 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><!-- Junit --><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version></dependency><dependency><groupId>org.spring.springboot</groupId><artifactId>springboot-dubbo-common</artifactId><version>0.0.1-SNAPSHOT</version></dependency></dependencies>
</project>

创建接口实现类

package org.spring.springboot.dubbo.impl;import org.spring.springboot.domain.City;
import org.spring.springboot.dubbo.CityDubboService;import com.alibaba.dubbo.config.annotation.Service;/*** 城市业务 Dubbo 服务层实现层** Created by bysocket on 28/02/2017.*/
// 注册为 Dubbo 服务
@Service(version = "1.0.0")
public class CityDubboServiceImpl implements CityDubboService {public City findCityByName(String cityName) {return new City(1L,2L,"温岭","是我的故乡");}
}

创建dubbo配置文件（application.properties），放在resources目录下

## Dubbo 服务提供者配置
spring.dubbo.application.name=provider
spring.dubbo.registry.address=zookeeper://127.0.0.1:2181
spring.dubbo.protocol.name=dubbo
spring.dubbo.protocol.port=20880
spring.dubbo.scan=org.spring.springboot.dubbo

修改项目启动类

package org.spring.springboot;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;/*** Spring Boot 应用启动类** Created by bysocket on 16/4/26.*/
// Spring Boot 应用的标识
@SpringBootApplication
public class ServerApplication {public static void main(String[] args) {// 程序启动入口// 启动嵌入式的 Tomcat 并初始化 Spring 环境及其各 Spring 组件SpringApplication.run(ServerApplication.class,args);}
}

创建springboot-dubbo-client

在eclipse中创建一个maven项目

maven-archetype-quickstart

Group Id：org.spring.springboot

Artiface Id：springboot-dubbo-client

Package：org.spring.springboot

修改pom.xml文件

<?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>springboot</groupId><artifactId>springboot-dubbo-client</artifactId><version>0.0.1-SNAPSHOT</version><name>springboot-dubbo 客户端:: 整合 Dubbo/ZooKeeper 详解 SOA 案例</name><!-- Spring Boot 启动父依赖 --><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.1.RELEASE</version></parent><properties><dubbo-spring-boot>1.0.0</dubbo-spring-boot></properties><dependencies><!-- Spring Boot Dubbo 依赖 --><dependency><groupId>io.dubbo.springboot</groupId><artifactId>spring-boot-starter-dubbo</artifactId><version>${dubbo-spring-boot}</version></dependency><!-- Spring Boot Web 依赖 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!-- Spring Boot Test 依赖 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><!-- Junit --><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version></dependency><dependency><groupId>org.spring.springboot</groupId><artifactId>springboot-dubbo-common</artifactId><version>0.0.1-SNAPSHOT</version></dependency></dependencies>
</project>

服务调用类

package org.spring.springboot.dubbo;import com.alibaba.dubbo.config.annotation.Reference;
import org.spring.springboot.domain.City;
import org.springframework.stereotype.Component;/*** 城市 Dubbo 服务消费者** Created by bysocket on 28/02/2017.*/
@Component
public class CityDubboConsumerService {@Reference(version = "1.0.0")CityDubboService cityDubboService;public void printCity() {String cityName="温岭";City city = cityDubboService.findCityByName(cityName);System.out.println(city.toString());}
}

创建dubbo配置文件（application.properties），放在resources目录下

## 避免和 server 工程端口冲突
server.port=8081## Dubbo 服务消费者配置
spring.dubbo.application.name=consumer
spring.dubbo.registry.address=zookeeper://127.0.0.1:2181
spring.dubbo.scan=org.spring.springboot.dubbo

修改项目启动类

package org.spring.springboot.dubbo;import com.alibaba.dubbo.config.annotation.Reference;
import org.spring.springboot.domain.City;
import org.springframework.stereotype.Component;/*** 城市 Dubbo 服务消费者** Created by bysocket on 28/02/2017.*/
@Component
public class CityDubboConsumerService {@Reference(version = "1.0.0")CityDubboService cityDubboService;public void printCity() {String cityName="温岭";City city = cityDubboService.findCityByName(cityName);System.out.println(city.toString());}
}

启动测试

启动工程之前必须先确认Zookeepeer是否已经启动，如果已经启动执行以下操作

1、启动springboot-dubbo-server，通过项目Main方法（ServerApplication）进行启动工程

2、启动springboot-dubbo-client，通过项目Main方法（ClientApplication）进行启动工程，成功如下：

如果展示出了上图，就表示消费端调用提供端已经成功。

Hello Wrold 已经完成