本例子分为客户端和服务端，
其中客户端核心类为：
App 客户端运行Main主类
DemoService 接口（公共部分包名——类名和服务端相同）
User VO对象，必须实现序列化，供VO接口使用（公共部分包名——类名和服务端相同）
服务端核心类为：
App 客户端运行Main主类
DemoService 接口 （公共部分包名——类名和客户端相同）
DemoServiceImpl 接口实现类，提供业务方法供客户端调用
User VO对象，必须实现序列化，供VO接口使用（公共部分包名——类名和客户端相同）
具体代码如下：
服务端：
客户端：
运行的Main主类
package cn.com.dubbo.dubboclient;
import java.io.IOException;
import java.util.List;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import cn.com.dubbo.dubbotest.DemoService;
/**
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.3</version>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.4.6</version>
</dependency>
<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>0.1</version>
</dependency>
*/
public class App
{
public static void main( String[] args ) throws IOException
{
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( new String[] { "applicationContext.xml" });
context.start();
DemoService demoService = (DemoService) context.getBean("demoService"); //
String hello = demoService.sayHello("tom"); // ִ
System.out.println(hello); //
//
List list = demoService.getUsers();
if (list != null && list.size() > 0) {
for (int i = 0; i < list.size(); i++) {
System.out.println(list.get(i));
}
}
// System.out.println(demoService.hehe());
System.in.read();
}
}
配置文件：
<?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
">
<!-- 消费方应用名，用于计算依赖关系，不是匹配条件，不要与提供方一样 -->
<dubbo:application name="hehe_consumer" />
<!-- 使用zookeeper注册中心暴露服务地址 -->
<!-- <dubbo:registry address="multicast://224.5.6.7:1234" /> -->
<dubbo:registry address="zookeeper://192.168.1.111:2181" />
<!-- 生成远程服务代理，可以像使用本地bean一样使用demoService -->
<dubbo:reference id="demoService"
interface="cn.com.dubbo.dubbotest.DemoService" />
</beans>
服务端：
运行的Main主类
package cn.com.dubbo.dubbotest;
import java.io.IOException;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.3</version>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.4.6</version>
</dependency>
<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>0.1</version>
</dependency>
*/
public class App
{
public static void main( String[] args ) throws IOException
{
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"applicationContext.xml"});
context.start();
System.in.read(); // 为保证服务一直开着，利用输入流的阻塞来模拟
}
}
DemoServiceImpl 接口实现类
package cn.com.dubbo.dubbotest;
import java.util.ArrayList;
import java.util.List;
public class DemoServiceImpl implements DemoService{
public String sayHello(String name) {
return "Hello " + name;
}
public List getUsers() {
List list = new ArrayList();
User u1 = new User();
u1.setName("jack");
u1.setAge(20);
u1.setSex("男");
User u2 = new User();
u2.setName("tom");
u2.setAge(21);
u2.setSex("女");
User u3 = new User();
u3.setName("rose");
u3.setAge(19);
u3.setSex("女");
list.add(u1);
list.add(u2);
list.add(u3);
return list;
}
}
配置文件：
<?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
">
<!-- 提供方应用信息，用于计算依赖关系 -->
<dubbo:application name="xixi_provider" />
<!-- 使用multicast广播注册中心暴露服务地址
<dubbo:registry address="multicast://224.5.6.7:1234" />-->
<!-- 使用zookeeper注册中心暴露服务地址 -->
<dubbo:registry address="zookeeper://192.168.1.111:2181" />
<!-- 用dubbo协议在20880端口暴露服务 -->
<dubbo:protocol name="dubbo" port="20880" />
<!-- 声明需要暴露的服务接口 -->
<dubbo:service interface="cn.com.dubbo.dubbotest.DemoService" ref="demoService" />
<!-- 和本地bean一样实现服务 -->
<bean id="demoService" class="cn.com.dubbo.dubbotest.DemoServiceImpl" />
</beans>
公共部分代码：
UserVO类
package cn.com.dubbo.dubbotest;
import java.io.Serializable;
//java.lang.IllegalStateException: Serialized class cn.com.dubbo.dubbotest.User must implement java.io.Serializable
public class User implements Serializable{
private String name;
private int age;
private String sex;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
}
接口类：
package cn.com.dubbo.dubbotest;
import java.util.List;
public interface DemoService {
String sayHello(String name);
public List getUsers();
}
运行结果验证
错误解决方案：
缺少VO类
