dubbo接口demo开发

Dubbo是一款高性能、轻量级的开源Java RPC框架。

很多朋友想学习测试dubbo接口，但是苦于没有可练习的dubbo接口而放弃，下面我就带大家开发一个简单的dubbo接口。

接口需求

客户端输入uncleyong（当然，也可以输入其它字符串），服务端返回hello uncleyong

开发环境

jdk + idea + maven + zookeeper

jdk安装：https://www.cnblogs.com/uncleyong/p/10732951.html

idea安装：https://www.cnblogs.com/uncleyong/p/10971923.html

maven安装：https://www.cnblogs.com/uncleyong/p/10743181.html

zookeeper安装：https://www.cnblogs.com/uncleyong/p/10737119.html

common开发

idea中创建模块dubbo-common

存放公共的实体类、接口

package com.uncleyong.dubbotest.service;


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

然后mvn install打包，供provider及consumer在pom文件中引包　

provider开发

idea中创建模块dubbo_provider

创建实现类

package com.uncleyong.dubbotest.service.impl;

import com.uncleyong.dubbotest.service.SayHelloToClient;


public class SayHelloToClientImpl implements SayHelloToClient {

    public String sayHello(String name){
        System.out.println("from client ：" + name);
        return "hello, " + name;
    }
}

配置文件，provider.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://dubbo.apache.org/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd">

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

    <!-- 使用zookeeper广播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="20888"/>

    <!-- 声明需要暴露的服务接口 -->
    <dubbo:service interface="com.uncleyong.dubbotest.service.SayHelloToClient" ref="sayhellotoclient"/>


    <!-- 和本地bean一样实现服务 -->
    <bean id="sayhellotoclient" class="com.uncleyong.dubbotest.service.impl.SayHelloToClientImpl"/>

</beans>

创建主运行文件，ProviderMain

package com.uncleyong.dubbotest.main;

import org.springframework.context.support.ClassPathXmlApplicationContext;


public class ProviderMain {
    public static void main(String[] args) throws Exception {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
                new String[] {"provider.xml"});
        context.start();
        System.out.println("注册成功，如想退出，按任意键退出");
        System.in.read(); // 按任意键退出
    }
}

consumer开发

idea中创建模块dubbo_consumer

主运行文件

package com.uncleyong.dubbotest.main;

import com.uncleyong.dubbotest.service.SayHelloToClient;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.Scanner;


public class ConsumerMain {
    public static void main(String[] args) throws Exception {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
                new String[] {"consumer.xml"});
        context.start();
        // 获取远程服务代理
        SayHelloToClient say = (SayHelloToClient) context.getBean("sayhellotoclient");
        // 执行远程方法
        String res = say.sayHello("UncleYong");
        // 显示调用结果
        System.out.println(res);
        new Scanner(System.in).next();
    }
}

配置文件，consumer.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://dubbo.apache.org/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd">


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

    <!-- 使用zookeeper广播注册中心暴露发现服务地址 -->
    <dubbo:registry address="zookeeper://127.0.0.1:2181"/>

    <!-- 生成远程服务代理，可以和本地bean一样使用demoService -->
    <dubbo:reference id="sayhellotoclient" interface="com.uncleyong.dubbotest.service.SayHelloToClient"/>

</beans>