Dubbo是阿里巴巴公司开源的一个高性能优秀的服务框架，使得应用可通过高性能的 RPC 实现服务的输出和输入功能，可以和Spring框架无缝集成。

Dubbo是一款高性能、轻量级的开源Java RPC框架，它提供了三大核心能力：面向接口的远程方法调用，智能容错和负载均衡，以及服务自动注册和发现。

• provider：暴露服务的服务提供方
• consumer：调用远程服务的服务消费方
• registry：服务注册于发现的注册中心
• monitor：统计服务调用次数和调用时间的监控中心
• container：服务运行容器

一、dubbo-provider

1、UserInfo

为什么要实现Serializable接口？当我们需要把对象的状态信息通过网络进行传输，或者需要将对象的状态信息持久化，以便将来使用时都需要把对象进行序列化。

@Data
public class UserInfo implements Serializable {
 private String account;
 private String password;
}

2、UserService

public interface UserService {
 // 定义用户登录的api
 UserInfo login(UserInfo user);
}

3、UserServiceImpl

@Component
@Service(interfaceClass = UserService.class)
public class UserServiceImpl implements UserService {
 public UserInfo login(UserInfo user) {
 UserInfo reUser = new UserInfo();
 reUser.setAccount("登录的账号为:"+user.getAccount());
 reUser.setPassword("登录的密码为:"+user.getPassword());
 return reUser;
 }
}

4、DubboProviderApplication

@SpringBootApplication
@EnableDubboConfiguration // 启用dubbo自动配置
public class DubboProviderApplication {
 public static void main(String[] args) {
 SpringApplication.run(DubboProviderApplication.class, args);
 }
}

5、pom.xml

<?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.boot.dubbo.demo</groupId>
 <artifactId>dubbo-provider</artifactId>
 <version>0.0.1-SNAPSHOT</version>
 <packaging>jar</packaging>
 <name>dubbo-provider</name>
 <description>Demo project for Spring Boot</description>
 <parent>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-parent</artifactId>
 <version>2.0.6.RELEASE</version>
 <relativePath/> <!-- lookup parent from repository -->
 </parent>
 <properties>
 <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 <java.version>1.8</java.version>
 </properties>
 <dependencies>
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-web</artifactId>
 </dependency>
 <!--Dubbo依赖-->
 <dependency>
 <groupId>com.alibaba.spring.boot</groupId>
 <artifactId>dubbo-spring-boot-starter</artifactId>
 <version>2.0.0</version>
 </dependency>
 <!--自动生成getter，setter，equals，hashCode和toString等等-->
 <dependency>
 <groupId>org.projectlombok</groupId>
 <artifactId>lombok</artifactId>
 <version>1.16.20</version>
 <scope>provided</scope>
 </dependency>
 <!--Zookeeper客户端-->
 <dependency>
 <groupId>com.101tec</groupId>
 <artifactId>zkclient</artifactId>
 <version>0.10</version>
 </dependency>
 <!--Zookeeper依赖，排除log4j避免依赖冲突-->
 <dependency>
 <groupId>org.apache.zookeeper</groupId>
 <artifactId>zookeeper</artifactId>
 <version>3.4.10</version>
 <exclusions>
 <exclusion>
 <groupId>org.slf4j</groupId>
 <artifactId>slf4j-log4j12</artifactId>
 </exclusion>
 <exclusion>
 <groupId>log4j</groupId>
 <artifactId>log4j</artifactId>
 </exclusion>
 </exclusions>
 </dependency>
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-test</artifactId>
 <scope>test</scope>
 </dependency>
 </dependencies>
 <build>
 <plugins>
 <plugin>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-maven-plugin</artifactId>
 </plugin>
 </plugins>
 </build>
</project>

6、application.yml

spring:
 dubbo:
 application:
 name: dubbo-provider
 protocol:
 name: dubbo
 port: 20880
 registry:
 address: zookeeper://127.0.0.1:2181

二、dubbo-consumer

1、UserController

@RestController
public class UserController {
 @Reference // 引用dubbo服务器提供服务器接口
 private UserService userService;
 @GetMapping("/login")
 public UserInfo login(UserInfo userInfo) {
 return userService.login(userInfo);
 }
}

2、DubboConsumerApplication

@SpringBootApplication
@EnableDubboConfiguration // 启用dubbo自动配置
public class DubboConsumerApplication {
 public static void main(String[] args) {
 SpringApplication.run(DubboConsumerApplication.class, args);
 }
}

3、pom.xml

<?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.boot.dubbo.demo</groupId>
 <artifactId>dubbo-consumer</artifactId>
 <version>0.0.1-SNAPSHOT</version>
 <packaging>jar</packaging>
 <name>dubbo-consumer</name>
 <description>Demo project for Spring Boot</description>
 <parent>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-parent</artifactId>
 <version>2.0.6.RELEASE</version>
 <relativePath/> <!-- lookup parent from repository -->
 </parent>
 <properties>
 <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 <java.version>1.8</java.version>
 </properties>
 <dependencies>
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-web</artifactId>
 </dependency>
 <!--依赖dubbo-provider服务提供者-->
 <dependency>
 <groupId>com.boot.dubbo.demo</groupId>
 <artifactId>dubbo-provider</artifactId>
 <version>0.0.1-SNAPSHOT</version>
 </dependency>
 <!--Dubbo依赖-->
 <dependency>
 <groupId>com.alibaba.spring.boot</groupId>
 <artifactId>dubbo-spring-boot-starter</artifactId>
 <version>2.0.0</version>
 </dependency>
 <!--Zookeeper客户端-->
 <dependency>
 <groupId>com.101tec</groupId>
 <artifactId>zkclient</artifactId>
 <version>0.10</version>
 </dependency>
 <!--Zookeeper依赖，排除log4j避免依赖冲突-->
 <dependency>
 <groupId>org.apache.zookeeper</groupId>
 <artifactId>zookeeper</artifactId>
 <version>3.4.10</version>
 <exclusions>
 <exclusion>
 <groupId>org.slf4j</groupId>
 <artifactId>slf4j-log4j12</artifactId>
 </exclusion>
 <exclusion>
 <groupId>log4j</groupId>
 <artifactId>log4j</artifactId>
 </exclusion>
 </exclusions>
 </dependency>
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-test</artifactId>
 <scope>test</scope>
 </dependency>
 </dependencies>
 <build>
 <plugins>
 <plugin>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-maven-plugin</artifactId>
 </plugin>
 </plugins>
 </build>
</project>

4、application.yml

spring:
 dubbo:
 application:
 name: dubbo-consumer
 protocol:
 name: dubbo
 port: 20880
 registry:
 address: zookeeper://127.0.0.1:2181
server:
 port: 8081

三、Zookeeper安装配置

「链接」

「链接」

「链接」

四、项目启动

五、查看Zookeeper服务注册情况

六、通过浏览器发送请求（dubbo-provider的服务注册到Zookeeper上，dubbo-consumer消费者可以调用注册的服务）。

到此，rpc远程调用服务通了！感兴趣的话可以去学习下。

原文链接：https://blog.csdn.net/sinat_27933301/article/details/100991670