2.rabbitmq简单模式

1.介绍

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• P：消息的生产者
• C：消息的消费者
• 红色：队列

2.撸代码

• 倒入依赖包

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

• 获取MQ的连接

package com.zpc.rabbitmq.util;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.Connection;

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("testhost");
        factory.setUsername("admin");
        factory.setPassword("admin");
        // 通过工程获取连接
        Connection connection = factory.newConnection();
        return connection;
    }
}

• 生产者发送消息到队列

package com.zpc.rabbitmq.simple;
import com.zpc.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();
    }
}

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• 消费者从队列中获取消息

package com.zpc.rabbitmq.simple;
import com.zpc.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 + "'");
        }
    }
}