activeMQ在java中的简单使用

原文地址：

https://www.songliguo.com/activemq-getting-started.html（菜鸟教程）

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如果是建立maven工程，引入的依赖jar 包局只要写一个就好！

<dependency>
		<groupId>org.apache.activemq</groupId>
		<artifactId>activemq-all</artifactId>
		<version>5.9.1</version>
	</dependency>

如果不是maven的需要导入apache-activemq-5.9.1下的lib目录下需要用到的jar文件，项目结构如下图所示：

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第一部分：

         首先是消息队列（关于创建消息的两种（queue和topic的区别，大家自行百度））

         消息提供者：

package cn.gxm.first;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;

public class Provider {

	private static final int SEND_NUMBER = 10;
	
	public static void main(String[] args) {
		
		//ConnectionFactory是连接工厂，JMS用它创建连接
		ConnectionFactory connectionFactory;
		//Connection JMS客户端到JMS provider的连接
		Connection connection = null;
		//Session 一个发送或者接收消息的线程
		Session session;
		//Destination 消息发送目的地，消息发送给谁接收
		Destination destination;
		//MessageProducer 消息发送者
		MessageProducer messageProducer;
		//构造ConnectionFactory 实例对象，此处采用ActiveMQ的实现jar
		connectionFactory = new ActiveMQConnectionFactory(
				ActiveMQConnection.DEFAULT_USER, //即admin
				ActiveMQConnection.DEFAULT_PASSWORD,//即admin
				"tcp://192.168.80.3:61616");//61616是在activemq.xml中定义的用来通信的端口，而8186是jetty的访问端口
		
		try {
			//构造工厂得到连接对象
			connection = connectionFactory.createConnection();
			//启动
			connection.start();
			//获取操作连接
			session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
			//创建一个Queue，名称为SongLiGuo_FirstQueue(创建queue)
                        destination = session.createQueue("FirstQueue");
			//得到消息生产者【发送者】
			messageProducer = session.createProducer(destination);
			//设置不持久化，根据实际情况而定
			messageProducer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
			//构造消息，此处写死，项目就是参数或者方法获取
			sendMessage(session, messageProducer);
			session.commit();
		} catch (Exception e) {
			e.printStackTrace();
		}finally {
			try {
				if(null != connection){
					connection.close();
				}
			} catch (Throwable ignore) {
			}
		}
	}
	
	 public static void sendMessage(Session session, MessageProducer producer)throws Exception {
	        for (int i = 1; i <= SEND_NUMBER; i++) {
	            TextMessage message = session.createTextMessage("ActiveMq 发送的消息" + i);
	            // 发送消息到目的地方
	            System.out.println("发送消息：" + "ActiveMq 发送的消息" + i);
	            producer.send(message);
	        }
	    }
	
}

            此时登陆activemq的控制台就会发现10条消息，因为没有消费者，所以现在一直在（queue） 

            消息消费者：

package cn.gxm.first;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.MessageConsumer;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;


public class Consumer {

	public static void main(String[] args) {
		
		//connectionFactory 连接工厂，JMS用它创建连接
		ConnectionFactory connectionFactory;
		//connection JMS客户端到JMS provider 的连接
		Connection connection = null;
		//session一个发送或者接收的线程
		Session session;
		//destination 消息目的地，发送给谁接收
		Destination destination;
		//消费者消息接收者
		MessageConsumer consumer;
		
		connectionFactory = new ActiveMQConnectionFactory(
				ActiveMQConnection.DEFAULT_USER, //即admin
				ActiveMQConnection.DEFAULT_PASSWORD,//即admin
				"tcp://192.168.80.3:61616");//61616是在activemq.xml中定义的用来通信的端口，而8186是jetty的访问端口
		
		try {
			//构造工厂得到连接对象
			connection = connectionFactory.createConnection();
			//启动
			connection.start();	
			//获取操作连接
			session = connection.createSession(Boolean.FALSE, Session.AUTO_ACKNOWLEDGE);
			destination = session.createQueue("FirstQueue");
            consumer = session.createConsumer(destination);
            while(true){
            	//设置接收者收消息的时间，为了方便测试，这里暂定设置为100s
            	TextMessage message = (TextMessage)consumer.receive(100);
            	if(null != message){
            		System.out.println("收到消息==="+message.getText());
            	}else{
            		break;
            	}
            }
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			try {
				if(null != connection){
					connection.close();
				}
			} catch (Throwable ignore) {
			}
		}
	}
	
}

             此时登陆activemq的控制台就会发现0条消息，因为出现了消费者，并且消费了指定的消息队列 

             关于主页面的消息名称的解释：

Name	消息队列的名称，消费者根据提供者的队列的名称，从相应的队列中获取消息！
Number Of Pending Messages	需要被处理的消息
Number Of Consumers	当前有几个消费者
Messages Enqueued	当前消息的总的条数
Messages Dequeued	已近被处理的消息条数

---

第二部分：话题队列

消息提供者：

package cn.gxm.topic;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;

public class Provider {

	private static final int SEND_NUMBER = 10;
	
	public static void main(String[] args) {
		
		//ConnectionFactory是连接工厂，JMS用它创建连接
		ConnectionFactory connectionFactory;
		//Connection JMS客户端到JMS provider的连接
		Connection connection = null;
		//Session 一个发送或者接收消息的线程
		Session session;
		//Destination 消息发送目的地，消息发送给谁接收
		Destination destination;
		//MessageProducer 消息发送者
		MessageProducer messageProducer;
		//构造ConnectionFactory 实例对象，此处采用ActiveMQ的实现jar
		connectionFactory = new ActiveMQConnectionFactory(
				ActiveMQConnection.DEFAULT_USER, //即admin
				ActiveMQConnection.DEFAULT_PASSWORD,//即admin
				"tcp://192.168.80.3:61616");//61616是在activemq.xml中定义的用来通信的端口，而8186是jetty的访问端口
		
		try {
			//构造工厂得到连接对象
			connection = connectionFactory.createConnection();
			//启动
			connection.start();
			//获取操作连接
			session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
			//创建一个Queue，名称为SongLiGuo_FirstQueue(创建queue)
                        destination = session.createTopic("FirstTopic");
			//得到消息生产者【发送者】
			messageProducer = session.createProducer(destination);
			//设置不持久化，根据实际情况而定
			messageProducer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
			//构造消息，此处写死，项目就是参数或者方法获取
			sendMessage(session, messageProducer);
			session.commit();
		} catch (Exception e) {
			e.printStackTrace();
		}finally {
			try {
				if(null != connection){
					connection.close();
				}
			} catch (Throwable ignore) {
			}
		}
	}
	
	 public static void sendMessage(Session session, MessageProducer producer)throws Exception {
	        for (int i = 1; i <= SEND_NUMBER; i++) {
	            TextMessage message = session.createTextMessage("ActiveMq 发送的消息" + i);
	            // 发送消息到目的地方
	            System.out.println("发送消息：" + "ActiveMq 发送的消息" + i);
	            producer.send(message);
	        }
	    }
	
}

 消息消费者：

package cn.gxm.topic;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;


public class Consumer {

	public static void main(String[] args) {
		
		//connectionFactory 连接工厂，JMS用它创建连接
		ConnectionFactory connectionFactory;
		//connection JMS客户端到JMS provider 的连接
		Connection connection = null;
		//session一个发送或者接收的线程
		Session session;
		//destination 消息目的地，发送给谁接收
		Destination destination;
		//消费者消息接收者
		MessageConsumer consumer;
		
		connectionFactory = new ActiveMQConnectionFactory(
				ActiveMQConnection.DEFAULT_USER, //即admin
				ActiveMQConnection.DEFAULT_PASSWORD,//即admin
				"tcp://192.168.80.3:61616");//61616是在activemq.xml中定义的用来通信的端口，而8186是jetty的访问端口
		
		try {
			//构造工厂得到连接对象
			connection = connectionFactory.createConnection();
			//启动
			connection.start();	
			//获取操作连接
			session = connection.createSession(Boolean.FALSE, Session.AUTO_ACKNOWLEDGE);
			destination = session.createTopic("FirstTopic");
            consumer = session.createConsumer(destination);
            TextMessage message = (TextMessage)consumer.receive(100);
            consumer.setMessageListener(new MessageListener() {
				
				public void onMessage(Message message) {
					try {
						//确认接收到了数据，可以在队列中删除
						message.acknowledge();
						System.out.println("收到消息==="+((TextMessage) message).getText());
					} catch (JMSException e) {
						e.printStackTrace();
					}
				}
			});
            System.in.read();
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			try {
				if(null != connection){
					connection.close();
				}
			} catch (Throwable ignore) {
			}
		}
	}
	
}