以注解的方式实现api和provider

1.provider

import com.alibaba.dubbo.config.annotation.Service;
import facade.EchoService;
import com.alibaba.dubbo.rpc.RpcContext;
import java.text.SimpleDateFormat;
import java.util.Date;

@Service
public class EchoServiceImpl implements EchoService {

    public String echo(String message) {
    String now=new SimpleDateFormat("HH:mm:ss").format(new Date());
    System.out.println("["+now+"] Hello"+message+", request from consumer"+RpcContext.getContext().getRemoteAddressString());
    return message;
    }
}

 配置类：

import com.alibaba.dubbo.config.ApplicationConfig;
import com.alibaba.dubbo.config.ProtocolConfig;
import com.alibaba.dubbo.config.ProviderConfig;
import com.alibaba.dubbo.config.RegistryConfig;
import com.alibaba.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.io.IOException;

public class AnnotationProvider {
    public static void main(String[] args) throws IOException {
        AnnotationConfigApplicationContext context=new AnnotationConfigApplicationContext(ProviderConfiguration.class);
        context.start();
        System.in.read();
    }

    @Configuration
    @EnableDubbo(scanBasePackages="provider")
    static class ProviderConfiguration{
        @Bean
        public ProviderConfig providerConfig(){
            return new ProviderConfig();
        }

        @Bean
        public ApplicationConfig applicationConfig(){
            ApplicationConfig applicationConfig=new ApplicationConfig();
            applicationConfig.setName("echo-annotation-provider");
            return applicationConfig;
        }

        @Bean
        public RegistryConfig registryConfig(){
            RegistryConfig registryConfig=new RegistryConfig();
            registryConfig.setProtocol("zookeeper");
            registryConfig.setAddress("localhost");
            registryConfig.setPort(2181);
            return registryConfig;
        }

        @Bean
        public ProtocolConfig protocolConfig(){
            ProtocolConfig protocolConfig=new ProtocolConfig();
            protocolConfig.setName("dubbo");
            protocolConfig.setPort(20880);
            return protocolConfig;
        }
    }

}

 start：