RabbitMQ 实例(一对一、一对多、多对多、多对一)

原理就不说了，自己先百度。我们不做理论高手，我们要实战。

现在网上的博客太混乱了，有些贴出来完全是错误的，很容易误导我们理解。

我这里主要是分享代码，让你们在电脑上跑起来。

在看下面之前，先看我上一篇博客 https://blog.csdn.net/shushugood/article/details/81076917，在本地把自己的rabbitmq服务先跑起来把。

目录结构如下：

1.我们先看pom.xml

<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.broadtech</groupId>
  <artifactId>springboot-rabbitmq</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  
 <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.0.RELEASE</version>
    </parent>
    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
            <scope>true</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        
       <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- 添加springboot对amqp的支持 -->
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <scope>provided</scope>
        </dependency>
        
        <!-- https://mvnrepository.com/artifact/com.rabbitmq/amqp-client --> 
		<dependency>
		    <groupId>com.rabbitmq</groupId>
		    <artifactId>amqp-client</artifactId>
		    <version>3.6.5</version>
		</dependency>
         
        
    </dependencies>
</project>

2.看 application.properties

spring.application.name=springboot-rabbitmq
spring.rabbitmq.host=127.0.0.1
spring.rabbitmq.port=5672
spring.rabbitmq.username=mengl
spring.rabbitmq.password=123456
#spring.rabbitmq.publisher-confirms=true
#spring.rabbitmq.virtual-host=/

3.Application.java

package com.rabbit;

import org.springframework.amqp.core.Queue;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.context.annotation.Bean;


@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
public class Application { 
    public final static String HELLO = "helloQueue1";

    public static void main(String[] args) throws Exception {
        SpringApplication.run(Application.class, args);
    }
    
    @Bean
    public Queue helloQueue() {
        return new Queue(Application.HELLO); // 1
    }
    
    @Bean
    public Queue userQueue() {
        return new Queue("user");
    } 
   
}

4. 下面是生产 sender 和消费 receiver

4.1 HelloReceiver1.java

package com.rabbit.hello;

import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

import com.rabbit.Application;

@Component
@RabbitListener(queues = Application.HELLO) //3
public class HelloReceiver1 {

    @RabbitHandler
    public void process(String hello) {
        System.out.println("Receiver1  : " + hello);
    }

}

4.2 HelloReceiver2.java

package com.rabbit.hello;
 
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

import com.rabbit.Application;

@Component
//@RabbitListener(queues = Application.HELLO)
public class HelloReceiver2 {

    @RabbitHandler
    public void process(String hello) {
        System.out.println("Receiver2  : " + hello);
    }

}

4.3 HelloSender1.java

package com.rabbit.hello;

import java.util.Date;

import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.rabbit.Application;

@Component
public class HelloSender1 {

    @Autowired
    private AmqpTemplate rabbitTemplate;

    public void send(String msg) {
        String sendMsg = "hello孟梁,你在测试MQ " + new Date();
        System.out.println("Sender1 : " + sendMsg);
        rabbitTemplate.convertAndSend(Application.HELLO, sendMsg); // 4
    }

}

4.4 HelloSender2.java

package com.rabbit.hello;
 

import java.util.Date;

import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.rabbit.Application;

@Component
public class HelloSender2 {

    @Autowired
    private AmqpTemplate rabbitTemplate;

    public void send(String msg) {
        String sendMsg = msg + new Date();
        System.out.println("Sender2 : " + sendMsg);
        this.rabbitTemplate.convertAndSend(Application.HELLO, sendMsg);
    }

}

5. 下面是controller

5.1 RabbitTest.java

package com.rabbit.controller; 
import org.springframework.amqp.core.Queue;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.rabbit.hello.HelloSender1;
import com.rabbit.hello.HelloSender2;

@RestController
@RequestMapping("/rabbit")
public class RabbitTest {
    
    @Autowired
    private HelloSender1 helloSender1;
    @Autowired
    private HelloSender2 helloSender2; 

    
    @GetMapping("/hello")
    public String hello() {
        helloSender1.send("a");
        return "/rabbit/hello的调用";
    }
    
    
    /**
     * 单生产者-多消费者
     */
    @GetMapping("/oneToMany")
    public void oneToMany() { 
        for(int i=0;i<10;i++){
        	System.out.println("执行"+i);
            helloSender1.send("hellomsg:"+i);
        }
        
    }
    
    
    /**
     * 多生产者-多消费者
     */
    @GetMapping("/manyToMany")
    public void manyToMany() {
        for(int i=0;i<10;i++){
            helloSender1.send("hellomsg:"+i);
            helloSender2.send("hellomsg:"+i);
        }
        
    }
    
}

6.测试页面 + 控制台显示。

一对一：

一对多： ( 即1个生产者提供10个棒棒糖，2个消费者平均每人分5个棒棒糖)

http://localhost:8080/rabbit/oneToMany

多对多：（生产者2个，消费者2个，都是平均分配）

多对一：（省略。同上）

总结：

RabbitMQ 实例(一对一、一对多、多对多、多对一)

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