RobbitMQ基本消息队列的消息发送过程

RabbitMQ: One broker to queue them all | RabbitMQ RabbitMQ官网

SpringAmqp的官方地址：Spring AMQP

代码示例:对着代码看应该能看明白

publisher:消息发送者的代码示例

package cn.itcast.mq.helloworld;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import org.junit.Test;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

public class PublisherTest {
    @Test
    public void testSendMessage() throws IOException, TimeoutException {
        // 1.建立连接
        ConnectionFactory factory = new ConnectionFactory();
        // 1.1.设置连接参数，分别是：主机名、端口号、vhost、用户名、密码
        factory.setHost("192.168.221.131");
        factory.setPort(5672);
        factory.setVirtualHost("/");
        factory.setUsername("itcast");
        factory.setPassword("123321");
        // 1.2.建立连接
        Connection connection = factory.newConnection();

        // 2.创建通道Channel
        Channel channel = connection.createChannel();

        // 3.创建队列
        String queueName = "simple.queue";
        channel.queueDeclare(queueName, false, false, false, null);

        // 4.发送消息
        String message = "hello, rabbitmq!";
        channel.basicPublish("", queueName, null, message.getBytes());
        System.out.println("发送消息成功：【" + message + "】");

        // 5.关闭通道和连接
        channel.close();
        connection.close();

    }
}

package cn.itcast.mq.helloworld;

import com.rabbitmq.client.*;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

public class ConsumerTest {

    public static void main(String[] args) throws IOException, TimeoutException {
        // 1.建立连接
        ConnectionFactory factory = new ConnectionFactory();
        // 1.1.设置连接参数，分别是：主机名、端口号、vhost、用户名、密码
        factory.setHost("192.168.221.131");
        factory.setPort(5672);
        factory.setVirtualHost("/");
        factory.setUsername("itcast");
        factory.setPassword("123321");
        // 1.2.建立连接
        Connection connection = factory.newConnection();

        // 2.创建通道Channel
        Channel channel = connection.createChannel();

        // 3.创建队列
        String queueName = "simple.queue";
        channel.queueDeclare(queueName, false, false, false, null);

        // 4.订阅消息
        channel.basicConsume(queueName, true, new DefaultConsumer(channel){
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope,
                                       AMQP.BasicProperties properties, byte[] body) throws IOException {
                // 5.处理消息
                String message = new String(body);
                System.out.println("接收到消息：【" + message + "】");
            }
        });
        System.out.println("等待接收消息。。。。");
    }
}

消息接收者代码示例.

SpringAMQP：

  简单消息队列模型:Basic Queue

什么是SpringAMQP:

SpringAMQP消息的发送案例:

        引入依赖

<!--AMQP依赖，包含RabbitMQ-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>

在相应的模块下配置yml文件:

spring:
  rabbitmq:
    host: 192.168.221.131
    port: 5672
    virtual-host: /
    username: itcast
    password: 123321

编写测试代码:

@RunWith(SpringRunner.class)
@SpringBootTest
public class test01 {

    @Autowired
    private RabbitTemplate rabbitTemplate;//rabbit的工具类

    @Test
    public void test(){
        String queueName="simple.queue";//消息队列的名字
        String message="hello libucun";//发送的消息
        rabbitTemplate.convertAndSend(queueName,message);//连接并且发送
    }
}

发送成功后在你虚拟机rabbit映射地址里能看到

注意：如果出现IO异常错误 检查yml文件port地址不要搞错了。如果连接超时，查看虚拟机的端口有没有变，没变的话可以重启虚拟机重新启动mq容器再试试。