RabbitMQ 简使用案例

第一步导入依赖 ：

<dependency>
            <groupId>com.rabbitmq</groupId>
            <artifactId>amqp-client</artifactId>
            <version>3.4.1</version>
</dependency>

第二步编写一个连接类获取MQ的连接：ConnectionUtil

package com.example.springboot_rabbitmq.util;

import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

public class ConnectionUtil {

    public static Connection getConnection() throws Exception {
        //定义连接工厂
        ConnectionFactory factory = new ConnectionFactory();
        //设置服务地址
        factory.setHost("localhost");
        //端口
        factory.setPort(5672);
        //设置账号信息，用户名、密码、vhost
        factory.setVirtualHost("/");
        factory.setUsername("guest");
        factory.setPassword("guest");
        // 通过工程获取连接
        Connection connection = factory.newConnection();
        if (connection.isOpen()){
            System.out.println("连接成功");
        }else{
            System.out.println("连接失败");
        }
        return connection;
    }

    public static void main(String[] args) {
        //测试连接
        try {
            System.out.println(ConnectionUtil.getConnection());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

第三步：启动本地服务端

测试连接：

连接成功没毛病

下面使用浏览器访问：http://localhost:15672

window下安装RabbitMQ教程：https://www.cnblogs.com/nongzihong/p/11578255.html

第四步：生产者发送消息到队列

package com.example.springboot_rabbitmq.simple;

import com.example.springboot_rabbitmq.util.ConnectionUtil;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
public class Send {

    private final static String QUEUE_NAME = "q_test_01";

    public static void main(String[] argv) throws Exception {
        // 获取到连接以及mq通道
        Connection connection = ConnectionUtil.getConnection();
        // 从连接中创建通道
        Channel channel = connection.createChannel();

        // 声明（创建）队列
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        // 消息内容
        String message = "Hello World!";
        channel.basicPublish("", QUEUE_NAME, null, message.getBytes());
        System.out.println(" [x] Sent '" + message + "'");
        //关闭通道和连接
        channel.close();
        connection.close();
    }

}

管理工具中查看消息：

第五步：消费者从队列中获取消息

package com.example.springboot_rabbitmq.simple;

import com.example.springboot_rabbitmq.util.ConnectionUtil;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.QueueingConsumer;

public class Recv {
    private final static String QUEUE_NAME = "q_test_01";

    public static void main(String[] argv) throws Exception {

        // 获取到连接以及mq通道
        Connection connection = ConnectionUtil.getConnection();
        // 从连接中创建通道
        Channel channel = connection.createChannel();
        // 声明队列
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        // 定义队列的消费者
        QueueingConsumer consumer = new QueueingConsumer(channel);

        // 监听队列
        channel.basicConsume(QUEUE_NAME, true, consumer);

        // 获取消息
        while (true) {
            QueueingConsumer.Delivery delivery = consumer.nextDelivery();
            String message = new String(delivery.getBody());
            System.out.println(" [x] Received '" + message + "'");
        }
    }

}

信息获取成功