rabbitMQ學習筆記(二) 簡單的發送與接收訊息 HelloWorld

首先要下載rabbitmq的javaClient庫，然後加入到項目中，下載地址為：http://www.rabbitmq.com/releases/rabbitmq-java-client/v3.1.5/rabbitmq-java-client-bin-3.1.5.zip

1、發送訊息

發送訊息首先要擷取與rabbitmq-server的串連，然後從渠道(chann)中指定的queue發送訊息 ， 不能定義兩個queue名字相同，但屬性不同

樣本：

Sender01.java

package com.zf.rabbitmq01;import java.io.IOException;import com.rabbitmq.client.Channel;import com.rabbitmq.client.Connection;import com.rabbitmq.client.ConnectionFactory;/** * 發送訊息 * @author zhoufeng * */public class Sender01 {public static void main(String[] args) throws IOException {ConnectionFactory connFac = new ConnectionFactory() ;//RabbitMQ-Server安裝在本機，所以直接用127.0.0.1connFac.setHost("127.0.0.1");//建立一個串連Connection conn = connFac.newConnection() ;//建立一個渠道Channel channel = conn.createChannel() ;//定義Queue名稱String queueName = "queue01" ;//為channel定義queue的屬性，queueName為Queue名稱channel.queueDeclare( queueName , false, false, false, null) ;String msg = "Hello World!";//發送訊息channel.basicPublish("", queueName , null , msg.getBytes());System.out.println("send message[" + msg + "] to "+ queueName +" success!");channel.close(); conn.close(); }}

Recv01.java

package com.zf.rabbitmq01;import java.io.IOException;import com.rabbitmq.client.Channel;import com.rabbitmq.client.Connection;import com.rabbitmq.client.ConnectionFactory;import com.rabbitmq.client.ConsumerCancelledException;import com.rabbitmq.client.QueueingConsumer;import com.rabbitmq.client.QueueingConsumer.Delivery;import com.rabbitmq.client.ShutdownSignalException;/** * 接收訊息 * @author zhoufeng * */public class Recv01 {public static void main(String[] args) throws IOException, ShutdownSignalException, ConsumerCancelledException, InterruptedException {ConnectionFactory connFac = new ConnectionFactory() ;connFac.setHost("127.0.0.1");Connection conn = connFac.newConnection() ;Channel channel = conn.createChannel() ;String queueName = "queue01";channel.queueDeclare(queueName, false, false, false, null) ;//上面的部分，與Sender01是一樣的//配置好擷取訊息的方式QueueingConsumer consumer = new QueueingConsumer(channel) ;channel.basicConsume(queueName, true, consumer) ;//迴圈擷取訊息while(true){//擷取訊息，如果沒有訊息，這一步將會一直阻塞Delivery delivery = consumer.nextDelivery() ;String msg = new String(delivery.getBody()) ;  System.out.println("received message[" + msg + "] from " + queueName);}}}

此時，無論先後啟動哪個類  ，都沒有關係 ，如果執行Sender01時  Recv01還沒有啟動 ， 那麼訊息將被儲存在RabbitMQ-Server上面，直到Recv01啟動後擷取，才會被移除