由于用例比较简单，直接上代码吧！

import org.springframework.context.support.ClassPathXmlApplicationContext;import com.alibaba.dubbo.demo.DemoService;import com.alibaba.dubbo.rpc.service.EchoService;public class Consumer {    /**     * @param args     * @throws Exception     */    public static void main(String[] args) throws Exception {        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(                new String[] { "classpath:consumer.xml" });        context.start();        // 回声测试        DemoService demoService = (DemoService) context.getBean("demoService");        for (int i = 0; i < 10; i++) {            EchoService echoService = (EchoService) demoService; // 强制转型为EchoService            String status = (String) echoService.$echo("OK=" + i); // 回声测试可用性            System.out.println(status);        }    }}

客户端控制台返回值：

OK=0OK=1OK=2OK=3OK=4OK=5OK=6OK=7OK=8OK=9