RabbitMQ整合Springboot(四)

创建生产者

1.1）添加依赖

<?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">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.4.RELEASE</version>
    </parent>
    <groupId>com.itheima</groupId>
    <artifactId>springboot-rabbitmq-producer</artifactId>
    <version>1.0-SNAPSHOT</version>
​
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>
    </dependencies>
</project>

1.2）启动类

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
​
@SpringBootApplication
public class ProducerApplication {
    public static void main(String[] args) {
        SpringApplication.run(ProducerApplication.class);
    }
}

1.3）配置RabbitMQ

spring:
  rabbitmq:
    host: localhost
    port: 5672
    virtual-host: /itcast
    username: heima
    password: heima

1.4)绑定交换机和队列

创建RabbitMQ队列与交换机绑定的配置类com.itheima.rabbitmq.config.RabbitMQConfig

import org.springframework.amqp.core.*;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
​
@Configuration
public class RabbitMQConfig {
    //交换机名称
    public static final String ITEM_TOPIC_EXCHANGE = "item_topic_exchange";
    //队列名称
    public static final String ITEM_QUEUE = "item_queue";
​
    //声明交换机 交换机 如果不创建 那必须手动创建
    @Bean("itemTopicExchange")
    public Exchange topicExchange(){
        return ExchangeBuilder.topicExchange(ITEM_TOPIC_EXCHANGE).durable(true).build();
    }
​
    //声明队列
    @Bean("itemQueue")
    public Queue itemQueue(){
        return QueueBuilder.durable(ITEM_QUEUE).build();
    }
​
    //绑定队列和交换机
    @Bean
    public Binding itemQueueExchange(@Qualifier("itemQueue") Queue queue,
                                     @Qualifier("itemTopicExchange") Exchange exchange){
        return BindingBuilder.bind(queue).to(exchange).with("item.#").noargs();
    }
​
}

1.5）消息发送

import com.itheima.rabbitmq.config.RabbitMQConfig;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
​
/**
 * 发送消息的测试类
 */
@RestController
public class SendMsgController {
​
    //注入RabbitMQ的模板
    @Autowired
    private RabbitTemplate rabbitTemplate;
​
    /**
     * 测试
     */
    @GetMapping("/sendmsg")
    public String sendMsg(@RequestParam String msg, @RequestParam String key){
​
        /**
         * 发送消息
         * 参数一：交换机名称
         * 参数二：路由key
         * 参数三：发送的消息
         */
        rabbitTemplate.convertAndSend(RabbitMQConfig.ITEM_TOPIC_EXCHANGE ,key ,msg);
​
        //返回消息
        return "发送消息成功！";
    }
}

2. 创建消费者

<?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>2.1.4.RELEASE</version>
    </parent>
    <groupId>com.itheima</groupId>
    <artifactId>springboot-rabbitmq-consumer</artifactId>
    <version>1.0-SNAPSHOT</version>
​
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>
    </dependencies>
​
</project>

2.1创建启动类

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
​
@SpringBootApplication
public class ConsumerApplication {
    public static void main(String[] args) {
        SpringApplication.run(ConsumerApplication.class);
    }
}

2.2配置MQ

创建application.yml，内容如下：

spring:
  rabbitmq:
    host: localhost
    port: 5672
    virtual-host: /itcast
    username: heima
    password: heima

2.3消息监听处理类

import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;
​
@Component
public class MyListener {
​
    /**
     * 监听某个队列的消息
     * @param message 接收到的消息
     */
    @RabbitListener(queues = "item_queue")
    public void myListener1(String message){
        System.out.println("消费者接收到的消息为：" + message);
    }
}

测试

在生产者工程springboot-rabbitmq-producer中创建测试类，发送消息：

import com.itheima.rabbitmq.config.RabbitMQConfig;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
​
@RunWith(SpringRunner.class)
@SpringBootTest
public class RabbitMQTest {
​
    @Autowired
    private RabbitTemplate rabbitTemplate;
​
    @Test
    public void test(){
        rabbitTemplate.convertAndSend(RabbitMQConfig.ITEM_TOPIC_EXCHANGE, "item.insert", "商品新增，routing key 为item.insert");
        rabbitTemplate.convertAndSend(RabbitMQConfig.ITEM_TOPIC_EXCHANGE, "item.update", "商品修改，routing key 为item.update");
        rabbitTemplate.convertAndSend(RabbitMQConfig.ITEM_TOPIC_EXCHANGE, "item.delete", "商品删除，routing key 为item.delete");
    }
}

先运行上述测试程序（交换机和队列才能先被声明和绑定），然后启动消费者；在消费者工程springboot-rabbitmq-consumer中控制台查看是否接收到对应消息。