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dubbo入门

一、下载zookeeper注册中心

下载zookeeper压缩包并解压，官网地址：http://www.apache.org/dyn/closer.cgi/zookeeper/
进入conf目录将 zoo_sample.cfg 改名为 zoo.cfg。
进入bin目录双击zkServer.cmd，若启动成功，则windows单机版zookeeper搭建成功。

二、配置dubbo-admin监控中心

下载dubbo-admin的代码，下载地址：https://github.com/apache/incubator-dubbo-ops。
下载后将其解压，进入如图目录下面。

3. 使用cmd进入该目录下面，然后执行 mvn package -Dmaven.test.skip=true(安装maven才有效)，等待项目打包。

　　 4. 执行完毕后进入 dubbo-admin目录下面的target目录，会有一个dubbo-admin-0.0.1-SNAPSHOT的jar包。

　　 5. cmd进入到jar包所在目录，执行 java -jar dubbo-admin-0.0.1-SNAPSHOT.jar 命令（在这一步之前必须开启zookeeper）。

　　 6. 运行完毕后在浏览器输入 http://127.0.0.1:7001,输入用户名 root 密码 root即可登陆。登陆完成页面如下。

三、创建dubbo的maven项目。

创建一个maven父工程，本工程只有一个pom文件，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.dobbu</groupId>
    <artifactId>dobbutest</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>dubbo-api</module>
        <module>dubbo-provider</module>
        <module>dubbo-consumer</module>
    </modules>

    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

        <spring.version>4.2.5.RELEASE</spring.version>

        <slf4j.version>1.7.18</slf4j.version>

        <log4j.version>1.2.17</log4j.version>
    </properties>

    <dependencyManagement>
        <dependencies>

            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.11</version>
            </dependency>

            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</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-context-support</artifactId>
                <version>${spring.version}</version>
            </dependency>


            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>${log4j.version}</version>
            </dependency>

            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-api</artifactId>
                <version>${slf4j.version}</version>
            </dependency>

            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
                <version>${slf4j.version}</version>
            </dependency>

            <dependency>
                <groupId>commons-logging</groupId>
                <artifactId>commons-logging</artifactId>
                <version>1.2</version>
            </dependency>

            <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>
        </dependencies>
    </dependencyManagement>

</project>

2.在上一个maven项目下面见一个maven moudle，这个maven moudle只定义接口。

3.在创建一个maven moudle来作为提供者，其目录结构如下。

DemoServiceImpl.java代码如下

public class DemoServiceImpl implements DemoService {
    @Override
    public String sayHello(String name) {
        return name;
    }
}

dubbo-provider.xml文件内容如下：

<?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">

    <!--设置应用名称-->
    <dubbo:application name="dubbo_provider"/>
    <!--设置注册中心地址-->
    <dubbo:registry address="zookeeper://127.0.0.1:2181"/>
    <!--使用dubbo协议暴露端口-->
    <dubbo:protocol name="dubbo" port="20880"/>
    <!--暴露需要暴漏的接口-->
    <dubbo:service interface="com.dobbu.DemoService" ref="demoService" />
</beans>

springmvc.xml文件内容

<?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"
       xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
       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
        http://code.alibabatech.com/schema/dubbo
        http://code.alibabatech.com/schema/dubbo/dubbo.xsd"
       >

    <bean id="demoService" class="com.dobbu.DemoServiceImpl"/>

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

</beans>

AppTest.java文件内容

public class AppTest 
{
   
    @Test
    public void shouldAnswerWithTrue()
    {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("classpath*:springmvc.xml");
        context.start();

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

        try {
            System.in.read();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

4.创建一个maven moudle来充当消费者。其目录结构如下：

dubbo-consumer.xml内容如下

<?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">

    <dubbo:application name="dubbo-consumer"/>

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

    <dubbo:reference interface="com.dobbu.DemoService" id="demoService"/>
</beans>

springmvc.xml文件内容如下

<?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">

    <import resource="dubbo-consumer.xml"/>
</beans>

AppTest.java内容如下

public class AppTest 
{
    /**
     * Rigorous Test :-)
     */
    @Test
    public void shouldAnswerWithTrue()
    {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("classpath*:springmvc.xml");

        context.start();

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

        System.out.println(demoService.sayHello("hhh"));

        try {
            System.in.read();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

四、测试项目

　　首先运行dubbo-provider项目的AppTest的测试方法，执行后可以在dobbu-admin监控页面看见该提供者。如图则表示服务已经注册。

运行dubbo-consumer的AppTest类的方法。会在控制台输出如下消息，并且在消费者里面可以查看到该服务。

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原文地址：https://www.cnblogs.com/jack1995/p/9378370.html