【转】Dubbo使用例子并且和Spring集成使用

一.编写客户端和服务器端共用接口类
1.登录接口类
public interface LoginService {
    public User login(String name, String psw);
}
2.注册接口类
public interface RegisterService {
     public User createUser(String name, String psw);
}
二服务器端
1.登录接口实现
public class LoginServiceImpl implements LoginService{
    public User login(String name, String psw){
        User user = null;
        if(name.equals("penngo") && psw.equals("123")){
            user = new User();
            user.setId(1);
            user.setName("penngo");
        }
        return user;
    }
}
2.注册接口实现
public class RegisterServiceImpl implements RegisterService{
     public User createUser(String name, String psw){
        User user = new User();
        user.setId(2);
        user.setName(name);
        user.setPassword(psw);
        return user;
    }
}
3.服务器端利用spring发布服务dubbo-penngo-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://code.alibabatech.com/schema/dubbo"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.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="provider-penngo-app"  />
 
    <!-- 使用zookeeper广播注册中心暴露服务地址 -->
    <dubbo:registry address="zookeeper://127.0.0.1:2181" />
    <!--  <dubbo:registry address="multicast://224.5.6.7:1234" />   -->
 
    <!-- 用dubbo协议在20880端口暴露服务 -->
    <dubbo:protocol name="dubbo" port="20880" />

    <!-- 和本地bean一样实现服务 -->
    <bean id="loginService" class="com.penngo.dubbo.serviceimpl.LoginServiceImpl" />
    <bean id="registerService" class="com.penngo.dubbo.serviceimpl.RegisterServiceImpl" />
    
    <!-- 声明需要暴露的服务接口 -->
    <dubbo:service interface="com.penngo.dubbo.service.LoginService" ref="loginService" />
    <dubbo:service interface="com.penngo.dubbo.service.RegisterService" ref="registerService" />
</beans>
4.服务启动类，发布服务
public class Server {
    public static void main(String[] args) throws Exception{
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"dubbo-penngo-provider.xml"});
        context.start();
        System.in.read(); // 按任意键退出
    }
}
客户端调用服务很简单，只需一个xml文件和一个java调用类
客户端利用spring配置可用远程服务器
<?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-2.5.xsd
    http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
    <dubbo:application name="consumer-penngo-app"  />
    <dubbo:registry address="zookeeper://127.0.0.1:2181" />
    <!-- 使用multicast广播注册中心暴露发现服务地址 -->
    <!--   <dubbo:registry address="multicast://224.5.6.7:1234" />  -->
    
    <!-- 生成远程服务代理， -->
    <dubbo:reference id="loginService" interface="com.penngo.dubbo.service.LoginService" />
    <dubbo:reference id="registerService" interface="com.penngo.dubbo.service.RegisterService" />
</beans>
客户端调用
public class Client {
     public static void main(String[] args) throws Exception {
      ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"dubbo-penngo-consumer.xml"});
      context.start();
      LoginService loginService = (LoginService)context.getBean("loginService"); // 获取远程服务代理
      User user = loginService.login("penngo", "123");
      System.out.println( user.getId() + " " + user.getName()); // 显示调用结果
      RegisterService registerService = (RegisterService)context.getBean("registerService");
      User user2 = registerService.createUser("penngo", "123");
      System.out.println( user2.getId() + " " + user2.getName()); // 显示调用结果
  }
}

文档来源：Dubbo使用例子并且和Spring集成使用