使用IntelliJ IDEA创建简单的Dubbo实例
Zookeeper为dubbo的注册中心,dubbo服务的生产者和消费者都需要在Zookeeper进行注册;下载zookeeper压缩包并解压;进入conf目录将 zoo_sample.cfg 改名为 zoo.cfg;进入bin目录双击zkServer.cmd,若启动成功,则windows单机版zookeeper搭建成功! 使用IntelliJ IDEA搭建Dubbo:创建一个maven空项目,作
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- Zookeeper为dubbo的注册中心,dubbo服务的生产者和消费者都需要在Zookeeper进行注册;
- 下载zookeeper压缩包并解压;
- 进入conf目录将 zoo_sample.cfg 改名为 zoo.cfg;
- 进入bin目录双击zkServer.cmd,若启动成功,则windows单机版zookeeper搭建成功!
- 使用IntelliJ IDEA搭建Dubbo:创建一个maven空项目,作为项目的父工程
- 在pom.xml添加以下公共的依赖:
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.dubbo</groupId> <artifactId>dubbo_demo</artifactId> <packaging>pom</packaging> <version>1.0-SNAPSHOT</version> <properties> <motan.version>0.3.0</motan.version> <dubbo.version>2.5.3</dubbo.version> <dubbox.version>2.8.4</dubbox.version> <spring.version>4.3.6.RELEASE</spring.version> <java.version>1.8</java.version> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.5.3</version> <exclusions> <exclusion> <groupId>org.springframework</groupId> <artifactId>spring</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>com.github.sgroschupf</groupId> <artifactId>zkclient</artifactId> <version>0.1</version> </dependency> <!-- spring相关 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jms</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjrt</artifactId> <version>1.6.11</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.6.11</version> </dependency> </dependencies> <modules> <module>dubbo_api</module> <module>dubbo_consumer</module> <module>dubbo_provider</module> </modules> </project>
- 在刚才创建的dubbo_demo下创建一个新的Module:dubbo_api(服务接口)
- dubbo_api的pom.xml文件如下:
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <parent> <artifactId>dubbo_demo</artifactId> <groupId>com.dubbo</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>dubbo_api</artifactId> <packaging>jar</packaging> </project>
- 重复3、4步骤,创建dubbo_provider(服务生产者),对应的pom.xml文件:
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <parent> <artifactId>dubbo_demo</artifactId> <groupId>com.dubbo</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>dubbo_provider</artifactId> <dependencies> <dependency> <groupId>com.dubbo</groupId> <artifactId>dubbo_api</artifactId> <version>1.0-SNAPSHOT</version> <scope>compile</scope> </dependency> </dependencies> </project>
- 再重复3、4步骤,创建dubbo_consumer(服务消费者),对应pom.xml文件如下:
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <parent> <artifactId>dubbo_demo</artifactId> <groupId>com.dubbo</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>dubbo_consumer</artifactId> <dependencies> <dependency> <groupId>com.dubbo</groupId> <artifactId>dubbo_api</artifactId> <version>1.0-SNAPSHOT</version> <scope>compile</scope> </dependency> </dependencies> </project>
- 最后项目结构如下:
- 框架搭建起来之后,开始写代码和配置文件,首先是dubbo_api:需要定义服务接口:
package com.api.service; /** * 定义服务接口 */ public interface DemoService { String sayHello(String name); }
- 然后再dubbo_provider中实现上述接口(由于在pom.xml文件中,将dubbo_api作为依赖,故能引入上述接口):
package com.provider.service; import com.api.service.DemoService; public class DemoServiceImpl implements DemoService { public String sayHello(String name) { return "Hello "+name; } }
- dubbo_provider项目中的resource文件包含dubbo-provider.xml和springmvc.xml配置文件,其中dubbo-provider.xml如下:
springmvc.xml如下:<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"> <!-- 提供方应用信息,用于计算依赖关系 --> <dubbo:application name="dubbo_provider" /> <!-- 使用zookeeper注册中心暴露服务地址 --> <dubbo:registry address="zookeeper://127.0.0.1:2181" /> <!-- 用dubbo协议在20880端口暴露服务 --> <dubbo:protocol name="dubbo" port="20880" /> <!-- 声明需要暴露的服务接口 --> <dubbo:service interface="com.api.service.DemoService" ref="demoService" /> <!-- 接口实现类--> <bean id="demoService" class="com.provider.service.DemoServiceImpl"/> </beans>
再在该工程下写一个测试类,后面测试用到:<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:util="http://www.springframework.org/schema/util" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd" default-autowire="byName"> <aop:aspectj-autoproxy /> <context:component-scan base-package="com" /> <import resource="classpath:dubbo-provider.xml" /> </beans>
package com.provider.test; import org.springframework.context.support.ClassPathXmlApplicationContext; import java.io.IOException; public class ProviderTest { public static void main(String[] args) { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("classpath:springmvc.xml"); context.start(); System.out.println("Dubbo provider start..."); try { System.in.read(); // 按任意键退出 } catch (IOException e) { e.printStackTrace(); } } }
- 接下来开始写消费者——dubbo_consumer的代码和配置文件:resource中的dubbo-consumer.xml:
springmvc.xml:<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd "> <!-- 消费方应用名,用于计算依赖关系,不是匹配条件,不要与提供方一样 --> <dubbo:application name="dubbo_consumer" /> <!-- 使用multicast广播注册中心暴露发现服务地址 --> <dubbo:registry protocol="zookeeper" address="zookeeper://127.0.0.1:2181" /> <!-- 生成远程服务代理,可以和本地bean一样使用demoService --> <dubbo:reference id="demoService" interface="com.api.service.DemoService" /> </beans>
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:util="http://www.springframework.org/schema/util" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd" default-autowire="byName"> <aop:aspectj-autoproxy /> <context:component-scan base-package="com" /> <import resource="classpath:/dubbo-consumer.xml" /> </beans>
- 然后写消费者的测试
package com.consumer; import com.api.service.DemoService; import org.springframework.context.support.ClassPathXmlApplicationContext; import java.io.IOException; public class ConsumerTest { public static void main(String[] args) { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] { "classpath:springmvc.xml" }); context.start(); DemoService demoService = (DemoService) context.getBean("demoService"); System.out.println(demoService.sayHello("哈哈哈")); try { System.in.read(); } catch (IOException e) { e.printStackTrace(); } } }
- 到现在整个代码就开发完成了,按照先后顺序,首先启动Zookeeper:zkServer.cmd 然后启动服务生产者测试类,最后启动服务消费者的测试类,当控制台输出以下结果,则代表成功。
服务生产者测试类控制台输出:
服务消费者测试了控制台输出:
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