开始前，先看一下demo项目工程结构：
1、抽离接口
dubbo-api工程，根据业务抽离接口，deploy到mave nexus。
public interface TestService { /** * @param name * @return */ public String sayHello(String name); /** * @param cmd * @return */ public String linuxCMD(String cmd); }
提供三维坐标：
<dependency> <groupId>com.dubbo</groupId> <artifactId>dubbo-api</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency>
2、提供者和消费者并行
dubbo-service工程pom引入实现接口三维坐标实现接口。
import com.dubbo.service.TestService;
import com.dubbo.common.TestLinuxCmd; public class TestServiceImpl implements TestService { @Override public String sayHello(String name) { // TODO Auto-generated method stub return null; } @Override public String linuxCMD(String cmd) { String exec = TestLinuxCmd.exec("192.168.20.20", "root", "123456", 22, name); return exec; } }
注：TestLinuxCmd方法来至dubbo-common工程，公共方法到放到这里，就不多做解释了。
写完服务记得暴露出服务：
<dubbo:service interface="com.dubbo.service.TestService" ref="testService" />
dubbo-controller工程pom同样也要引入实现接口三维坐标，调用这个接口。
package com.dubbo.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import com.dubbo.service.TestService; @Controller public class MyController { @Autowired private TestService testService; @RequestMapping(value = "/test") @ResponseBody public String testSay(@RequestParam(value = "name",defaultValue = "") String name){ StringBuffer sb = new StringBuffer(); sb.append("Dubbo: ").append(testService.sayHello(name)); return sb.toString(); } }
消费者不需要关心谁提供的服务，它只需要调用三维坐标的接口即可。
写完同样记得暴露出服务：
<dubbo:reference interface="com.dubbo.service.TestService" id="testService" check="false" />
