基于SpringBoot+Dubbo+Zookeeper+Maven+IDEA搭建分布式项目实战

1.环境搭建:

2.项目搭建:

2、打开IDEA开发工具，创建一个基于maven的SpringBoot的父项目，然后基于父项目创建三个子模块module，最终项目结构如下图：

 

1）打开父项目pom.xml文件，添加刚才创建的三个子模块，如下图完整代码：

<?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>2.4.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>


    <groupId>com.demo</groupId>
    <artifactId>spring-dubbo-demo</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>


    <modules>
        <module>dubboapi</module>
        <module>dubboprovider</module>
        <module>dubbocustomer</module>
    </modules>

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

    <dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
        <exclusions>
            <exclusion>
                <groupId>org.junit.vintage</groupId>
                <artifactId>junit-vintage-engine</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

注意：<packaging>pom</packaging> 需要手动添加。

2）dubbo-api模块中新增服务接口类HelloService，代码如下：

package com.demo.api.service;

public interface HelloService {
    String sayHello(String name);
}

dubbo-api中pom.xml代码如下：

<?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">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.4.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>com.demo</groupId>
    <artifactId>dubbo-api</artifactId>
    <version>1.0-SNAPSHOT</version>

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

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

结构目录如下图：

 

3）dubbo-provider模块中新增实现接口类HelloServiceImpl，代码如下：

package com.demo.provider.service.impl;

import com.alibaba.dubbo.config.annotation.Service;
import com.demo.api.service.HelloService;

/**
 * @author youqc
 * @version V1.0
 * @Description: (用一句话描述该文件做什么)
 * @date 2021/7/21
 */
@Service    //@Service 是dubbo发布服务的注解
public class HelloServiceImpl  implements HelloService{
    @Override
    public String sayHello(String name) {
        return "Hello,"+name;
    }
}

dubbo-provider中DubboProviderApplication启动类添加dubbo注解，代码如下：

package com.demo.provider;

import com.alibaba.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * @author youqc
 * @version V1.0
 * @Description: (用一句话描述该文件做什么)
 * @date 2021/7/21
 */
@SpringBootApplication
@EnableDubbo    //@EnableDubbo 是启动dubbo服务注解；
public class DubboProviderApplication {
    public static void main(String[] args) {
        SpringApplication.run(DubboProviderApplication.class, args);
    }
}

dubbo-provider中pom.xml代码如下：

<?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">

    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.4.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>


    <groupId>com.demo</groupId>
    <artifactId>provider</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <java.version>1.8</java.version>
        <zookeeper.version>3.4.13</zookeeper.version>
        <dubbo.version>0.2.0</dubbo.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>com.demo</groupId>
            <artifactId>dubbo-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>


        <dependency>
            <groupId>com.alibaba.boot</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>${dubbo.version}</version>
        </dependency>

        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>${zookeeper.version}</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>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

dubbo-provider中application.yml配置内容如下：

server:
  port: 8091

dubbo:
  application:
    name: dubbo-provider
  protocol:
    name: dubbo
    port: 20884
  registry:
    address: zookeeper://127.0.0.1:2181

结构目录如下图：

注意：

@Service 是dubbo发布服务的注解；

@EnableDubbo 是启动dubbo服务注解；

log4j 和 slf4j-log4j12 需要排除，否则会与zookeeper冲突；

4）dubbo-customer模块中新增控制类HelloController，便于测试，代码如下：

package com.demo.customer.controller;

import com.alibaba.dubbo.config.annotation.Reference;
import com.demo.api.service.HelloService;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author youqc
 * @version V1.0
 * @Description: (用一句话描述该文件做什么)
 * @date 2021/7/21
 */
@RestController
public class HelloController {

    @Reference  //@Reference 是dubbo引用服务的注解
    private HelloService helloService;

    @GetMapping("/sayHello")
    private String sayHello(@RequestParam String name){
        System.out.println("调用成功");
        return helloService.sayHello(name);
    }

}

dubbo-customer中pom.xml代码如下：

<?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">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.4.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>com.demo</groupId>
    <artifactId>dubbo-customer</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <java.version>1.8</java.version>
        <zookeeper.version>3.4.13</zookeeper.version>
        <dubbo.version>0.2.0</dubbo.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>com.demo</groupId>
            <artifactId>dubbo-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>com.alibaba.boot</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>${dubbo.version}</version>
        </dependency>

        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>${zookeeper.version}</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>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

dubbo-customer中application.yml配置内容如下：

server:
  port: 8092

dubbo:
  application:
    name: dubbo-customer
  registry:
    address: zookeeper://127.0.0.1:2181

结构目录如下图：

 

注意：

@Reference 是dubbo引用服务的注解；

至此，基于dubbo的分布式项目框架就搭建完成了。

三、项目消费-服务功能测试：

1）首先运行启动服务提供者dubbo-provider子模块

2）然后启动服务消费者dubbo-customer子模块

3）测试网址路径：http://localhost:8090/sayHello?name=12312