基于dubbo-config api编写provider，api

不管是XML配置还是注解方式，最终都会转换成java api对应的配置对象。

provider：

import com.alibaba.dubbo.config.ApplicationConfig;
import com.alibaba.dubbo.config.RegistryConfig;
import com.alibaba.dubbo.config.ServiceConfig;
import facade.EchoService;
import java.io.IOException;

public class EchoProviderBasedApi {
    public static void main(String[] args) throws IOException {
        ServiceConfig<EchoService> service = new ServiceConfig<EchoService>();
        service.setApplication(new ApplicationConfig("java-echo-provider"));
        service.setRegistry(new RegistryConfig("zookeeper://127.0.0.1:2181"));
        service.setInterface(EchoService.class);
        service.setRef(new EchoServiceImpl());
        service.export();
        System.out.println("java-echo-provider is running");
        System.in.read();
    }
}

api：

import com.alibaba.dubbo.config.ApplicationConfig;
import com.alibaba.dubbo.config.ReferenceConfig;
import com.alibaba.dubbo.config.RegistryConfig;
import facade.EchoService;

public class EchoConsumerBasedApi {
    public static void main(String[] args) {
        ReferenceConfig<EchoService> reference=new ReferenceConfig<EchoService>();
        reference.setApplication(new ApplicationConfig("java-echo-consumer"));
        reference.setInterface(EchoService.class);
        reference.setRegistry(new RegistryConfig("zookeeper://127.0.0.1:2181"));
        EchoService service=reference.get();
        String message=service.echo("hello world");
        System.out.println(message);
    }
}