RabbitMQ消息队列代码实现

新建发送者Send.java

package com.luo.rabbit.test.one;

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

public class Send {

    //队列名称  
    private final static String QUEUE_NAME = "queue";  

    public static void main(String[] argv) throws java.io.IOException  
    {  
        /** 
         * 创建连接连接到MabbitMQ 
         */  
        ConnectionFactory factory = new ConnectionFactory();  
        //设置MabbitMQ所在主机ip或者主机名   
        factory.setHost("127.0.0.1"); 
        //创建一个连接  
        Connection connection = factory.newConnection();  
        //创建一个频道  
        Channel channel = connection.createChannel();  
        //指定一个队列  
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);  
        //发送的消息  
        String message = "hello world!";  
        //往队列中发出一条消息  
        channel.basicPublish("", QUEUE_NAME, null, message.getBytes());  
        System.out.println("Sent '" + message + "'");  
        //关闭频道和连接  
        channel.close();  
        connection.close();  
     }  
}

新建接收者Recv.java

package com.luo.rabbit.test.one;

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

public class Recv  { 
    //队列名称  
    private final static String QUEUE_NAME = "queue";  
    public static void main(String[] argv) throws java.io.IOException,
    java.lang.InterruptedException  
    {  
        //打开连接和创建频道，与发送端一样  
        ConnectionFactory factory = new ConnectionFactory();
        //设置MabbitMQ所在主机ip或者主机名  
        factory.setHost("127.0.0.1");  
        Connection connection = factory.newConnection();  
        Channel channel = connection.createChannel();  
        //声明队列，主要为了防止消息接收者先运行此程序，队列还不存在时创建队列。  
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);  
        System.out.println("Waiting for messages. To exit press CTRL+C");  

        //创建队列消费者  
        QueueingConsumer consumer = new QueueingConsumer(channel);  
        //指定消费队列  
        channel.basicConsume(QUEUE_NAME, true, consumer);  
        while (true)  
        {  
            //nextDelivery是一个阻塞方法（内部实现其实是阻塞队列的take方法）  
            QueueingConsumer.Delivery delivery = consumer.nextDelivery();  
            String message = new String(delivery.getBody());  
            System.out.println("Received '" + message + "'");
        }  

    }  
} 

例子一可能通俗易懂，但是并不是很规范，而且有些缺陷，比如我要发送一个对象过去呢？下面看另外一个例子：

首先建一个连接类，因为发送者和接收者的连接代码都是一样的，之后让二者继承这个连接类即可。
连接类代码BaseConnector.java：

import java.io.IOException;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

public class BaseConnector {
    protected Channel channel;
    protected Connection connection;
    protected String queueName;
    public BaseConnector(String queueName) throws IOException{
        this.queueName = queueName;
        //打开连接和创建频道
        ConnectionFactory factory = new ConnectionFactory();
        //设置MabbitMQ所在主机ip或者主机名  127.0.0.1即localhost
        factory.setHost("127.0.0.1");
        //创建连接  
        connection = factory.newConnection();
        //创建频道  
        channel = connection.createChannel();
        //声明创建队列
        channel.queueDeclare(queueName, false, false, false, null);
    }
}

发送者Sender.java：

import java.io.IOException;
import java.io.Serializable;
import org.apache.commons.lang.SerializationUtils;

public class Sender extends BaseConnector {
    public Sender(String queueName) throws IOException {
        super(queueName);
    }

    public void sendMessage(Serializable object) throws IOException {
        channel.basicPublish("",queueName, null, SerializationUtils.serialize(object));
    }   
}

接收者代码Receiver.java：

import java.io.IOException;
import org.apache.commons.lang.SerializationUtils;
import com.rabbitmq.client.AMQP.BasicProperties;
import com.rabbitmq.client.Envelope;
import com.rabbitmq.client.Consumer;
import com.rabbitmq.client.ShutdownSignalException;

public class Receiver extends BaseConnector implements Runnable, Consumer {

    public Receiver(String queueName) throws IOException {
        super(queueName);
    }

    //实现Runnable的run方法
    public void run() {
         try {
            channel.basicConsume(queueName, true,this);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * 下面这些方法都是实现Consumer接口的
     **/    
    //当消费者注册完成自动调用
    public void handleConsumeOk(String consumerTag) {
        System.out.println("Consumer "+consumerTag +" registered");
    }
    //当消费者接收到消息会自动调用
    public void handleDelivery(String consumerTag, Envelope env,
                BasicProperties props, byte[] body) throws IOException {
        MessageInfo messageInfo = (MessageInfo)SerializationUtils.deserialize(body);
        System.out.println("Message ( "
                + "channel : " + messageInfo.getChannel() 
                + " , content : " + messageInfo.getContent() 
                + " ) received.");

    }
    //下面这些方法可以暂时不用理会
    public void handleCancelOk(String consumerTag) {
    }
    public void handleCancel(String consumerTag) throws IOException {
    }
    public void handleShutdownSignal(String consumerTag,
            ShutdownSignalException sig) {
    }
    public void handleRecoverOk(String consumerTag) {
    }
}
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