我们使用主流的SpringBoot框架整合RocketMQ来讲解，使用方便快捷；

最终项目结构如下：

具体步骤如下：

第一步：我们新建一个父项目rocketmq-test,pom类型，主要是依赖管理，包括版本的管理，以及管理module子项目

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>
    <packaging>pom</packaging>
    <modules>
        <module>rocketmq-provider</module>
        <module>rocketmq-consumer</module>
    </modules>
    <groupId>com.java1234</groupId>
    <artifactId>rocketmq-test2</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <springboot.version>2.3.2.RELEASE</springboot.version>
        <rocketmq.version>2.2.0</rocketmq.version>
    </properties>

    <dependencyManagement>

        <dependencies>

            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${springboot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <dependency>
                <groupId>org.apache.rocketmq</groupId>
                <artifactId>rocketmq-spring-boot-starter</artifactId>
                <version>${rocketmq.version}</version>
            </dependency>
        </dependencies>

    </dependencyManagement>

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

</project>

第二步：新建消息生产者rocketmq-provider子项目

pom.xml加下依赖：

<?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">
    <parent>
        <artifactId>rocketmq-test2</artifactId>
        <groupId>com.java1234</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>rocketmq-provider</artifactId>

    <dependencies>

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

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

    </dependencies>

</project>

新建项目配置文件application.yml，指定name-server，以及producer-group组

rocketmq:
  name-server: 127.0.0.1:9876
  producer:
    group: producer-demo1

新建消息生产者Service类ProducerService

package com.java1234.rocketmq;

import org.apache.rocketmq.spring.core.RocketMQTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

/** * 消息生产者 * @author java1234_小锋 * @site www.java1234.com * @company 南通小锋网络科技有限公司 * @create 2021-08-22 22:16 */
@Component("producerService")
public class ProducerService {

    @Autowired
    private RocketMQTemplate rocketMQTemplate;

    /** * 发送简单消息 */
    public void sendMessage(){
        for(int i=0;i<10;i++){
            rocketMQTemplate.convertAndSend("java1234-rocketmq","rocketmq大爷，你好！"+i);
        }
    }
}

SpringBoot给我们提供了RocketMQTemplate模板类，我们利用这个类可以以多种形式发送消息；

另外这个类我们要加下@Component注解，让Spring来管理实例，方便其他地方获取bean来使用；

发送方法指定Topic主题java1234-rocketmq；

启动类获取ProducerService实例，调用发送消息方法

package com.java1234;

import com.java1234.rocketmq.ProducerService;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;

@SpringBootApplication
public class RocketmqTestApplication {

    public static void main(String[] args) {
        ConfigurableApplicationContext run = SpringApplication.run(RocketmqTestApplication.class, args);
        ProducerService producerService = (ProducerService) run.getBean("producerService");
        producerService.sendMessage();
    }

}

我们获取ProducerService实例，调用sendMessage方法发送消息；

第三步：新建消息消费者rocketmq-consumer子项目

pom.xml加下依赖：

<?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">
    <parent>
        <artifactId>rocketmq-test2</artifactId>
        <groupId>com.java1234</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>rocketmq-consumer</artifactId>

    <dependencies>

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

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

    </dependencies>

</project>

新建项目配置文件application.yml，指定name-server，以及consumer-group组

server:
  port: 8084
  servlet:
    context-path: /

rocketmq:
  name-server: 127.0.0.1:9876
  consumer:
    group: consumer-demo1

新建消息消费者Service类ConsumerService，监听消息，消费消息

package com.java1234.rocketmq;

import org.apache.rocketmq.spring.annotation.RocketMQMessageListener;
import org.apache.rocketmq.spring.core.RocketMQListener;
import org.springframework.stereotype.Component;

/** * 消息消费者 * @author java1234_小锋 * @site www.java1234.com * @company 南通小锋网络科技有限公司 * @create 2021-08-22 22:40 */
@RocketMQMessageListener(topic = "java1234-rocketmq",consumerGroup ="${rocketmq.consumer.group}" )
@Component
public class ConsumerService implements RocketMQListener<String> {

    @Override
    public void onMessage(String s) {
        System.out.println("收到消息内容："+s);
    }
}

消费者类要实现RocketMQListener接口，以及动态指定消息类型String。

类上要加上//@RocketMQMessageListener/*/*注解，指定topic主题java1234-rocketmq，以及消费者组${rocketmq.consumer.group}

同样这个类上也要加上@Component注解，让Spring来管理bean实例；

第四步：测试

先启动rocketmq-consumer项目，监听消息

再启动rockeqmq-provider项目，发送消息

消息消费者端收到消息：

测试OK，成功消费！