增加IHelloService接口，但是无法执行。

dubbo-example/dubbo-service-provider/src/main/java/com/ai/ipu/dubbo/provider/IHelloService.java

package com.ai.ipu.dubbo.provider;
public interface IHelloService {
    
    public String hello(String name);
}

dubbo-example/dubbo-service-provider/src/main/java/com/ai/ipu/dubbo/provider/impl/HelloService.java

package com.ai.ipu.dubbo.provider.impl;
import com.ai.ipu.dubbo.provider.IHelloService;
public class HelloService implements IHelloService{
    public String hello(String name) {
        return "hello" + name;
    }
}

dubbo-example/dubbo-service-provider/src/main/resources/dubbo-provider-simple.xml

    <!-- 服务注册配置 start=========================== -->
    <dubbo:service interface="com.ai.ipu.dubbo.provider.HelloService" ref="helloService" token="true"/>
    <bean id="helloService" class="com.ai.ipu.dubbo.provider.impl.HelloServiceImpl"/>
    
    <dubbo:service interface="com.ai.ipu.dubbo.provider.IHelloService" ref="iHelloService" token="true"/>
    <bean id="iHelloService" class="com.ai.ipu.dubbo.provider.impl.HelloService"/>
    <!-- 服务注册配置 end =========================== -->
</beans>

dubbo-example/dubbo-service-provider/src/test/java/com/ai/ipu/dubbo/provider/HelloServiceTest.java

package com.ai.ipu.dubbo.provider;
import junit.framework.TestCase;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class HelloServiceTest extends TestCase {
    @Override
    protected void setUp() throws Exception {
        // TODO Auto-generated method stub
        context = new ClassPathXmlApplicationContext(new String[] { DubboServiceProviderStart.DUBBO_CONSUMER_CONFIG });
        context.start();
    }
    
    public void testHello() {
        // TODO Auto-generated method stub
        HelloService helloService = (HelloService)context.getBean("helloService"); // 获取远程服务代理
        String result = helloService.hello("测试名称"); // 执行远程方法
        System.out.println(result); // 显示调用结果
    }
    
    public void testIHello() {
        IHelloService helloService = (IHelloService)context.getBean("iHelloService"); // 获取远程服务代理
        String result = helloService.hello("测试名称"); // 执行远程方法
        System.out.println(result); // 显示调用结果
    }
}