把傳統工程改成dubbo（註解形式)分散式工程步驟
1.建立一個最簡單的傳統專案
OrderController.java
OrderServiceImpl.java
2.開始改造，建立dubbo目錄結構
dubbo-parent:
pom.xml
<?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>dubbo</groupId>
<artifactId>dubbo-parent</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<name>dubbo-parent</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<dubbo-spring-boot>1.0.0</dubbo-spring-boot>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.6.RELEASE</version>
</parent>
<modules>
<module>dubbo-api</module>
<module>dubbo-provider</module>
<module>dubbo-consumer</module>
</modules>
<dependencies>
<!-- Spring Boot Dubbo 依賴 -->
<dependency>
<groupId>io.dubbo.springboot</groupId>
<artifactId>spring-boot-starter-dubbo</artifactId>
<version>${dubbo-spring-boot}</version>
</dependency>
<!-- Spring Boot Web 依賴 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- Spring Boot Test 依賴 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
</project>
dubbo-api 存放的為實體和介面
dubbo-provider 服務提供者
啟動之後，會將服務註冊到zookpeer裡面
dubbo-consumer 服務消費端
啟動consumer:瀏覽器輸入http://localhost:8094/say
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