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