4.activeMQ订阅者

稍微改一下代码就好啦

package activeMQ2;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;

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

/*
 * 消息生产者-发布者
 */
public class JMSProducer {
    static String userName=ActiveMQConnection.DEFAULT_USER;
    static String password=ActiveMQConnection.DEFAULT_PASSWORD;
    static String brokerURL=ActiveMQConnection.DEFAULT_BROKER_URL;
    static int sendnum=10;
    public static void main(String[] args) {
    
        
        // TODO Auto-generated method stub
        ConnectionFactory connectionFactory=new ActiveMQConnectionFactory(userName, password, brokerURL);
        Connection connection = null ;
        Session session;// 会话，接受或发送消息的线程
        Destination destination;
        MessageProducer messageProducer;
        try {
            connection=connectionFactory.createConnection();
            connection.start();
            /*
             * Session.AUTO_ACKNOWLEDGE 用户成功从receive方法返回的时候，或从MessageListener.onMessage方法
             * 成功返回时，会话会自动确认客户收到消息
             * Session.CLIENT_ACKNOWLEDGE 客户通过消息的acknowledge方法确认，注意一个被消费的消息将自动确认所
             * 有已被会话消费的消息。
             * Session.SESSION_TRANSACTED 会话迟钝的确认消息的提交
             */
            session=connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
            destination=session.createTopic("FirstTopic1");//创建消息
            messageProducer=session.createProducer(destination);
            sendMessage(session, messageProducer);//发送消息
            session.commit();//提交
        } catch (JMSException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
            if(connection!=null){
                try {
                    connection.close();
                } catch (JMSException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    
    }
    /*
     * 产生消息并发消息
     */
    public static void sendMessage(Session session,MessageProducer messageProducer) throws JMSException {
        for(int i=0;i<sendnum;i++){
            TextMessage textMessage=session.createTextMessage("Message"+i);
            messageProducer.send(textMessage);
            System.out.println("开始发布消息Message"+i);
        }
        // TODO Auto-generated method stub

    }
}

package activeMQ2;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.Session;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
/*
 * 消息消费-订阅者1
 */
public class JMSConsumer {
	static String userName=ActiveMQConnection.DEFAULT_USER;
	static String password=ActiveMQConnection.DEFAULT_PASSWORD;
	static String brokerURL=ActiveMQConnection.DEFAULT_BROKER_URL;
	public static void main(String[] args) {
		ConnectionFactory connectionFactory=new ActiveMQConnectionFactory(userName, password, brokerURL);
		Connection connection = null ;
		Session session;// 会话，接受或发送消息的线程
		Destination destination;
		MessageConsumer messageConsumer;
		try {
			connection=connectionFactory.createConnection();
			connection.start();
			session=connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
			destination=session.createTopic("FirstTopic1");//创建连接的消息队列
			messageConsumer=session.createConsumer(destination);
			messageConsumer.setMessageListener(new Listener());//注册消息监听
		} catch (JMSException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
//		while(true){
//			
//		}
	}

}

　　

package activeMQ2;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.TextMessage;
/*
 * 消息监听-订阅者1
 */
public class Listener implements MessageListener{

    @Override
    public void onMessage(Message message) {
        try {
            System.out.println("订阅者1收到消息"+((TextMessage) message).getText());
        } catch (JMSException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }

}

再来一个

package activeMQ2;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.Session;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
/*
 * 消息消费-订阅者2
 */
public class JMSConsumer2 {
    static String userName=ActiveMQConnection.DEFAULT_USER;
    static String password=ActiveMQConnection.DEFAULT_PASSWORD;
    static String brokerURL=ActiveMQConnection.DEFAULT_BROKER_URL;
    public static void main(String[] args) {
        ConnectionFactory connectionFactory=new ActiveMQConnectionFactory(userName, password, brokerURL);
        Connection connection = null ;
        Session session;// 会话，接受或发送消息的线程
        Destination destination;
        MessageConsumer messageConsumer;
        try {
            connection=connectionFactory.createConnection();
            connection.start();
            session=connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
            destination=session.createTopic("FirstTopic1");//创建连接的消息队列
            messageConsumer=session.createConsumer(destination);
            messageConsumer.setMessageListener(new Listener2());//注册消息监听
        } catch (JMSException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
//        while(true){
//            
//        }
    }

}

package activeMQ2;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.TextMessage;
/*
 * 消息监听-订阅者2
 */
public class Listener2 implements MessageListener{

	@Override
	public void onMessage(Message message) {
		try {
			System.out.println("订阅者2收到消息"+((TextMessage) message).getText());
		} catch (JMSException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}

}

　　

先订阅

在发布消息