这两天在学习dubbo，想使用SpringCloudAlibaba的成员nacos作为配置中心，但是网上搜索的资源都是特别老特别老的，踩坑无数之后，终于整合成功，为了让大家少走弯路，我特意贴出来跟大家分享一下。文章最后，我会贴出自己的项目地址，大家可以作为参考。

nacos安装

1. 下载最新稳定版，传送门
2. 解压，然后直接进行单机版启动即可

unzip nacos-server-1.0.0.zip
cd nacos/bin 
sh startup.sh -m standalone

浏览器访问localhost:8848/nacos
用户名和密码都是nacos

项目框架结构

主模块下主要分为4个模块，分别是

1. API接口部分，主要写对外提供的接口使用
2. common 部分，常用的工具类，常量等
3. order 部分，订单模块，既是消费者也是生产者
4. store 部分，库存模块，既是消费者也是生产者

SpringBoot 整合Dubbo

1. 父POM

<?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>
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.2.RELEASE</version>
    <relativePath/>
  </parent>
  <groupId>org.yuwb</groupId>
  <artifactId>micro-service-all</artifactId>
  <version>1.0-SNAPSHOT</version>
  <modules>
    <module>micro-service-order</module>
    <module>micro-service-store</module>
    <module>micro-service-api</module>
    <module>micro-service-common</module>
  </modules>
  <packaging>pom</packaging>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <dubbo.version>2.7.3</dubbo.version>
  </properties>

  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-dependencies</artifactId>
        <version>2.2.2.RELEASE</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>

      <!-- Apache Dubbo  -->
      <dependency>
        <groupId>org.apache.dubbo</groupId>
        <artifactId>dubbo-dependencies-bom</artifactId>
        <version>${dubbo.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
      <dependency>
        <groupId>org.apache.dubbo</groupId>
        <artifactId>dubbo</artifactId>
        <version>${dubbo.version}</version>
        <exclusions>
          <exclusion>
            <groupId>org.springframework</groupId>
            <artifactId>spring</artifactId>
          </exclusion>
          <exclusion>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
          </exclusion>
          <exclusion>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
          </exclusion>
        </exclusions>
      </dependency>
    </dependencies>
  </dependencyManagement>

</project>

2. 编写api接口

   
   

public interface SayHello {
    /**
     * say hello
     *
     * @param name name
     * @return String
     */
    String sayHello(String name);
}

这个模块只是为了提供对外的API接口，理论上不需要任何jar包。

3. 生产者
   这里使用store模块作为生产者

• pom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>
        <groupId>org.yuwb</groupId>
        <artifactId>micro-service-all</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>micro-service-order</artifactId>

    <name>micro-service-order</name>


    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!-- Dubbo Spring Boot Starter -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
        </dependency>

        <!--nacos-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo-registry-nacos</artifactId>
            <version>0.0.1</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba.spring</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>1.0.2</version>
        </dependency>

        <dependency>
            <groupId>org.yuwb</groupId>
            <artifactId>micro-service-api</artifactId>
            <version>1.0-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

• 编写生产者实现类
  新建provider包

  
  

@Service(version = "1.0.0")
public class SayHelloProvider implements SayHello {
    @Override
    public String sayHello(String name) {
        return name + ",hello";
    }
}

这里值得注意的是@Service注解使用的是dubbo的即org.apache.dubbo.config.annotation.Service

• 修改appication.yml文件增加dubbo配置

dubbo:
  scan:
    base-packages: org.yuwb.provider
  protocol:
    name: dubbo
    port: 12345
  registry:
    address: nacos://192.168.174.134:8848

这里dubbo的生产者就编写好了。

4. 消费者

• 消费者的依赖和生产者一摸一样，不需要任何变动，直接复制即可。
• 配置文件中加入如下配置：

dubbo:
  registry:
    address: nacos://192.168.174.134:8848

• 编写消费者

@Slf4j
@Compoment
public class SayHelloController {

    @Reference(version = "1.0.0")
    private SayHello sayHello;

    @Bean
    public ApplicationRunner runner() {
        return args -> log.info(sayHello.sayHello("dubbo"));
    }

}

然后依次启动生产者和消费者
访问nacos

整合mybatisPlus

• 在pom中添加如下依赖

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.2.0</version>
        </dependency>

• 配置文件中增加mysql，mybatisPlus相关配置

spring:
  application:
    name: micro-service-order
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    username: root
    password: root
    url: jdbc:mysql://localhost:3306/test?serverTimezone=CTT&useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true
mybatis-plus:
  mapper-locations: mapper/*.xml
  type-aliases-package: org.yuwb.model
  configuration:
    map-underscore-to-camel-case: true
  global-config:
    db-config:
      table-underline: true
      logic-not-delete-value: 0
      logic-delete-value: 1

Test

1. 先启动provider然后启动consumer

   
   

通过日志可以看出，消费者已经成功消费。

2. 查看nacos控制台

   
   

项目地址：

• https://github.com/xiao-ren-wu/micro-service/tree/init

参考文档：

• https://github.com/alibaba/nacos
• http://dubbo.apache.org/en-us/