dubbo示例代码

准备条件

1. zookeeper,maven(推荐阿里云仓库),java 运行环境

开始:

使用 maven新建接口项目 demoService,完成新建一个接口

public interface DemoInter {
    String sayHello(String name);
    List getUsers();
} 

完成后打包接口为 jar 包,供 服务端和客户端使用

创建服务端,新建 server 项目,引入依赖和打包好的 jar 文件

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>dubbo</artifactId>
    <version>2.5.3</version>
</dependency>

<!-- https://mvnrepository.com/artifact/com.101tec/zkclient -->
<dependency>
    <groupId>com.101tec</groupId>
    <artifactId>zkclient</artifactId>
    <version>0.10</version>
</dependency>
新建类,实现DemoInter接口

public class SampleServiceImpl implements DemoInter {
    @Override
    public String sayHello(String name) {
        return "hello == " + name;
    }

    @Override
    public List getUsers() {
        List<User> users = new ArrayList<>();
        User user = new User();
        user.setName("eric");
        user.setPwd("234");

        users.add(user);

        return users;
    }
}

新建spring 配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p"
       xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
    <bean id="simpleService" class="com.dubbo.inter.impl.SampleServiceImpl"></bean>
    <dubbo:application name="server"/>
    <!-- 消息中心地址 -->
    <dubbo:registry address="zookeeper://localhost:2181" check="false"/>
    <dubbo:protocol name="dubbo" port="20880"/>
    <!-- 声明接口 -->
    <dubbo:service retries="0" interface="com.dubbo.inter.DemoInter" ref="simpleService"/>
</beans>
新建可执行的服务端

public class App {

    public static void main(String[] args) throws IOException {
        ClassPathXmlApplicationContext
                applicationContext =
                new ClassPathXmlApplicationContext(new String[]{"classpath:spring.xml"});
        applicationContext.start();
        System.in.read();

    }
}
此时,dubbo 服务端项目完成

下面创建客户端,同上,新建client 项目,引入 maven 依赖,和打包好的 jar 文件
新建客户端 spring 配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p"
       xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

    <dubbo:application name="comsumer"/>
    <!-- 消息中心地址 -->
    <dubbo:registry address="zookeeper://localhost:2181" check="false"/>
    <dubbo:reference interface="com.dubbo.inter.DemoInter" id="sampleService" check="false"/>
</beans>

创建客户端可执行文件

public class App {
    public static void main(String[] args) {
        ClassPathXmlApplicationContext classPathXmlApplicationContext
                = new ClassPathXmlApplicationContext(new String[]{"spring_consumer.xml"});
        DemoInter inter = (DemoInter) classPathXmlApplicationContext.getBean("sampleService");
        System.out.println(inter.sayHello("hees"));
    }
}

运行客户端,可远程调用服务端代码了.