rabbitmq入门程序

生产者消费者案例

　　我们这里展示一个生产者和一个消费者的案例

　　生产者代码:

package com.layton;

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

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

public class Producer_HelloWorld {
    public static void main(String[] args) throws IOException, TimeoutException {
        //1.创建连接工厂
        ConnectionFactory factory = new ConnectionFactory();
        //2.设置连接参数
        factory.setHost("127.0.0.1");//默认值为localhost
        factory.setPort(5672);//默认值为5672
        factory.setVirtualHost("/layton");//虚拟机默认为/
        factory.setUsername("layton");//guest
        factory.setPassword("layton");//guest
        //3.获取对应连接connection
        Connection connection = factory.newConnection();
        //4.创建channel
        Channel channel = connection.createChannel();
        //5.创建队列queue,名字有则创建,没有则不会创建
        channel.queueDeclare("hello_world", true, false, false, null);
        //6.发消息
        String body = "hello world2";
        channel.basicPublish("","hello_world",null,body.getBytes());
        //7.释放资源
        channel.close();
        connection.close();
    }
}
/*
    String queue, boolean durable, boolean exclusive, boolean autoDelete, Map<String, Object> arguments
    参数:
        queue 队列名称
        durable 是否持久化,当mq重启之后还在
        exclusive 是否独占:只能有一个消费者监听队列 当connection关闭时是否删除队列
        autoDelete 是否自动删除:当没有consumer会自动删除自己
        arguments 不讲
 */

/*
    String exchange, String routingKey, BasicProperties props, byte[] body
    参数:
        exchange 交换机的名称 简单模式下交换机会使用默认的
        routingKey 路由名称
        props 配置信息
        body 字节数组 真实的消息数据
 */

　　运行后该生产者就会将消息放到mq里

　　消费者代码:

package com.layton;

import com.rabbitmq.client.*;

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

public class Consumer_HelloWorld {
    public static void main(String[] args) throws IOException, TimeoutException {
        //1.创建连接工厂
        ConnectionFactory factory = new ConnectionFactory();
        //2.设置连接参数
        factory.setHost("127.0.0.1");//默认值为localhost
        factory.setPort(5672);//默认值为5672
        factory.setVirtualHost("/layton");//虚拟机默认为/
        factory.setUsername("layton");//guest
        factory.setPassword("layton");//guest
        //3.获取对应连接connection
        Connection connection = factory.newConnection();
        //4.创建channel
        Channel channel = connection.createChannel();
        //5.创建队列queue,名字有则创建,没有则不会创建
        channel.queueDeclare("hello_world", true, false, false, null);
        //6.收消息
        Consumer consumer = new DefaultConsumer(channel) {
            //回调方法,当收到消息后会自动执行该方法
            /**
             * @param consumerTag 标识
             * @param envelope 获取一些信息,交换机,路由key
             * @param properties 配置信息
             * @param body 真实的数据
             * @throws IOException
             */
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println("consumerTag = " + consumerTag);
                System.out.println("envelopeExchange = " + envelope.getExchange());
                System.out.println("envelopeRoutingKey = " + envelope.getRoutingKey());
                System.out.println("properties = " + properties);
                System.out.println("body = " + new String(body));
            }
        };
        channel.basicConsume("hello_world",true,consumer);
        //7.不要释放资源
    }
}

/*
    String queue, boolean autoAck, Consumer callback
    参数:
        queue 队列名
        autoAck 是否自动确认,和mq说一声我收到了
        callback 回调对象
 */

　　运行完消费者就会从mq里取出消息