新人一看就懂：Dubbo+Zookeeper的RPC远程调用框架demo

问题导读

1.Dubbo是什么？
2.Dubbo的服务提供方和服务消费方如何用代码实现？
3.Zookeeper如何安装配置？

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（服务提供方）

1、Java Bean
  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。
  使用了Lombok，它能通过注解的方式，在编译时自动为属性生成构造器、getter/setter、equals、hashcode、toString方法。
[mw_shl_code=java,true]@Data
public class UserInfo implements Serializable {
private String account;
private String password;
}[/mw_shl_code]

2、UserService
  服务提供方暴露的服务，将注册到zookeeper上。

[mw_shl_code=java,true]public interface UserService { // 定义用户登录的api
UserInfo login(UserInfo user);
}[/mw_shl_code]

3、UserServiceImpl
  服务提供方暴露的服务对应的实现类。

[mw_shl_code=java,true]@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;
}
}[/mw_shl_code]

4、DubboProviderApplication
[mw_shl_code=java,true]@SpringBootApplication
@EnableDubboConfiguration // 启用dubbo自动配置
public class DubboProviderApplication {

public static void main(String[] args) {
      SpringApplication.run(DubboProviderApplication.class, args);
}
}[/mw_shl_code]

5、pom.xml

[mw_shl_code=xml,true]<?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/> 
</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>

      
      <dependency>
         <groupId>com.alibaba.spring.boot</groupId>
         <artifactId>dubbo-spring-boot-starter</artifactId>
         <version>2.0.0</version>
      </dependency>

      
      <dependency>
         <groupId>org.projectlombok</groupId>
         <artifactId>lombok</artifactId>
         <version>1.16.20</version>
         <scope>provided</scope>
      </dependency>

      
      <dependency>
         <groupId>com.101tec</groupId>
         <artifactId>zkclient</artifactId>
         <version>0.10</version>
      </dependency>

      
      <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>[/mw_shl_code]

6、application.yml

[mw_shl_code=xml,true]spring:
  dubbo:
application:
   name: dubbo-provider
protocol:
   name: dubbo
   port: 20880
registry:
   address: zookeeper://127.0.0.1:2181[/mw_shl_code]

二、dubbo-consumer（服务消费方）

1、UserController

[mw_shl_code=java,true]@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);
}
}[/mw_shl_code]

2、DubboConsumerApplication
[mw_shl_code=java,true]@SpringBootApplication
@EnableDubboConfiguration // 启用dubbo自动配置
public class DubboConsumerApplication {

public static void main(String[] args) {
      SpringApplication.run(DubboConsumerApplication.class, args);
}
[/mw_shl_code]

3、pom.xml

[mw_shl_code=xml,true]<?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/> 
</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>

      
      <dependency>
         <groupId>com.boot.dubbo.demo</groupId>
         <artifactId>dubbo-provider</artifactId>
         <version>0.0.1-SNAPSHOT</version>
      </dependency>

      
      <dependency>
         <groupId>com.alibaba.spring.boot</groupId>
         <artifactId>dubbo-spring-boot-starter</artifactId>
         <version>2.0.0</version>
      </dependency>

      
      <dependency>
         <groupId>com.101tec</groupId>
         <artifactId>zkclient</artifactId>
         <version>0.10</version>
      </dependency>

      
      <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>[/mw_shl_code]

4、application.yml

[mw_shl_code=xml,true]spring:
  dubbo:
application:
   name: dubbo-consumer
protocol:
   name: dubbo
   port: 20880
registry:
   address: zookeeper://127.0.0.1:2181
server:
  port: 8081[/mw_shl_code]

三、Zookeeper安装配置
《Zookeeper是什么？》

《Zookeeper的安装配置》

《Zookeeper集群环境搭建》

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。

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来源：CSDN

作者：码农云帆哥

原文：《新人一看就懂：Dubbo+Zookeeper的RPC远程调用框架demo》

https://blog.csdn.net/sinat_27933301/article/details/100991670?utm_source=app