ActiveMQ初实践之【一】——入门实例

一、准备工作

1. 下载：官方网站下载ActiveMQ

2. 安装：直接解压运行bin目录下面的activemq.bat文件

3. 启动成功后登陆：http://localhost:8161/admin/

4. 创建一个Queue，命名为FirstQueue，到这里准备工作OK

二、开始实例

首先，创建一个普通的java项目，然后导入java包（本人导入的是activemq-all-5.9.0.jar）

其次，创建消息发送者

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;public class Sender {    // 连接工厂    private static ConnectionFactory connectionFactory;    static {        connectionFactory = new ActiveMQConnectionFactory(                ActiveMQConnection.DEFAULT_USER,                ActiveMQConnection.DEFAULT_PASSWORD, "tcp://localhost:61616");    }    public static void send(Session session, MessageProducer producer)            throws JMSException {        for (int i = 0; i < 10; i++) {            // 创建消息            TextMessage msg = session.createTextMessage("消息" + i);            // 发送消息            producer.send(msg);            System.out.println("发送消息：消息" + i);        }    }    public static void main(String[] args) {        // 连接        Connection connection = null;        // 会话        Session session = null;        // 目的地，消息要发往的地方        Destination destination;        // 消息发送者        MessageProducer producer = null;        try {            // 获取消息连接            connection = connectionFactory.createConnection();            // 开启连接            connection.start();            // 通过连接创建会话            session = connection.createSession(Boolean.TRUE,                    Session.AUTO_ACKNOWLEDGE);            // 创建消息队列            destination = session.createQueue("FirstQueue");            // 创建发送者            producer = session.createProducer(destination);            // 发送消息            send(session, producer);        } catch (JMSException e) {            e.printStackTrace();        } finally {            try {                session.commit();                connection.close();            } catch (JMSException e) {                e.printStackTrace();            }        }    }}

最后，添加消息接受者

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 javax.jms.TextMessage;import org.apache.activemq.ActiveMQConnection;import org.apache.activemq.ActiveMQConnectionFactory;public class Consumer {    private static ConnectionFactory connectionFactory;    static {        connectionFactory = new ActiveMQConnectionFactory(                ActiveMQConnection.DEFAULT_USER,                ActiveMQConnection.DEFAULT_PASSWORD, "tcp://localhost:61616");    }    public static void main(String[] args) {        Connection connection = null;        Session session = null;        Destination destination;        MessageConsumer consumer = null;        try {            connection = connectionFactory.createConnection();            connection.start();            session = connection.createSession(Boolean.FALSE,                    Session.AUTO_ACKNOWLEDGE);            destination = session.createQueue("FirstQueue");            consumer = session.createConsumer(destination);            while (true) {                TextMessage msg = (TextMessage) consumer.receive(30000);                if (msg != null) {                    System.out.println("接收到的消息：" + msg.getText());                } else {                    break;                }            }        } catch (JMSException e) {            e.printStackTrace();        } finally {            try {                consumer.close();                session.commit();                connection.close();            } catch (JMSException e) {                e.printStackTrace();            }        }    }}

运行结果

• sender

log4j:WARN No appenders could be found for logger (org.apache.activemq.transport.WireFormatNegotiator).log4j:WARN Please initialize the log4j system properly.log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.发送消息：消息0发送消息：消息1发送消息：消息2发送消息：消息3发送消息：消息4发送消息：消息5发送消息：消息6发送消息：消息7发送消息：消息8发送消息：消息9

• Consumer

log4j:WARN No appenders could be found for logger (org.apache.activemq.transport.WireFormatNegotiator).log4j:WARN Please initialize the log4j system properly.log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.接收到的消息：消息0接收到的消息：消息1接收到的消息：消息2接收到的消息：消息3接收到的消息：消息4接收到的消息：消息5接收到的消息：消息6接收到的消息：消息7接收到的消息：消息8接收到的消息：消息9

注意：接受消息还可以通过MessageListener接收

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 ConsumerListener {    private static ConnectionFactory connectionFactory;    static {        connectionFactory = new ActiveMQConnectionFactory(                ActiveMQConnection.DEFAULT_USER,                ActiveMQConnection.DEFAULT_PASSWORD, "tcp://localhost:61616");    }    public static void main(String[] args) {        Connection connection = null;        Session session = null;        Destination destination;        MessageConsumer consumer = null;        try {            connection = connectionFactory.createConnection();            connection.start();            session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);            destination = session.createQueue("FirstQueue");            consumer = session.createConsumer(destination);            consumer.setMessageListener(new MessageListener() {                @Ovoutide                public void onMessage(Message message) {                    TextMessage msg = (TextMessage) message;                    try {                        System.out.println(msg.getText());                    } catch (JMSException e) {                        e.printStackTrace();                    }                }            });        } catch (JMSException e) {            e.printStackTrace();        }finally{            try {                consumer.close();                session.commit();                connection.close();            } catch (JMSException e) {                e.printStackTrace();            }        }    }}

实例托管于coding