最近由于公司项目需要 -ActiveMQ接收+发送消息,用的是ActiveMQ</span>。由于这方面网上的例子不是很多,而且有的也不完整。于是经过几天的摸索学习,在网上找到了合适的方案。
ProducerTool.java用于发送消息:
java 代码
- package homework;
-
- import javax.jms.Connection;
- import javax.jms.DeliveryMode;
- 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 ProducerTool {
-
- private String user = ActiveMQConnection.DEFAULT_USER;
-
- private String password = ActiveMQConnection.DEFAULT_PASSWORD;
-
- private String url = ActiveMQConnection.DEFAULT_BROKER_URL;
-
- private String subject = "TOOL.DEFAULT";
-
- private Destination destination = null;
-
- private Connection connection = null;
-
- private Session session = null;
-
- private MessageProducer producer = null;
-
-
- private void initialize() throws JMSException, Exception {
- ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(
- user, password, url);
- connection = connectionFactory.createConnection();
- session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
- destination = session.createQueue(subject);
- producer = session.createProducer(destination);
- producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
- }
-
-
- public void produceMessage(String message) throws JMSException, Exception {
- initialize();
- TextMessage msg = session.createTextMessage(message);
- connection.start();
- System.out.println("Producer:->Sending message: " + message);
- producer.send(msg);
- System.out.println("Producer:->Message sent complete!");
- }
-
-
- public void close() throws JMSException {
- System.out.println("Producer:->Closing connection");
- if (producer != null)
- producer.close();
- if (session != null)
- session.close();
- if (connection != null)
- connection.close();
- }
- }
ConsumerTool.java用于接受消息,我用的是基于消息监听的机制,需要实现MessageListener接口,这个接口有个onMessage方法,当接受到消息的时候会自动调用这个函数对消息进行处理。
java 代码
- package homework;
-
- import javax.jms.Connection;
- import javax.jms.Destination;
- import javax.jms.JMSException;
- import javax.jms.MessageConsumer;
- import javax.jms.Session;
- import javax.jms.MessageListener;
- import javax.jms.Message;
- import javax.jms.TextMessage;
-
- import org.apache.activemq.ActiveMQConnection;
- import org.apache.activemq.ActiveMQConnectionFactory;
-
- public class ConsumerTool implements MessageListener {
-
- private String user = ActiveMQConnection.DEFAULT_USER;
-
- private String password = ActiveMQConnection.DEFAULT_PASSWORD;
-
- private String url = ActiveMQConnection.DEFAULT_BROKER_URL;
-
- private String subject = "TOOL.DEFAULT";
-
- private Destination destination = null;
-
- private Connection connection = null;
-
- private Session session = null;
-
- private MessageConsumer consumer = null;
-
-
- private void initialize() throws JMSException, Exception {
- ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(
- user, password, url);
- connection = connectionFactory.createConnection();
- session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
- destination = session.createQueue(subject);
- consumer = session.createConsumer(destination);
-
- }
-
-
- public void consumeMessage() throws JMSException, Exception {
- initialize();
- connection.start();
-
- System.out.println("Consumer:->Begin listening...");
-
- consumer.setMessageListener(this);
-
- }
-
-
- public void close() throws JMSException {
- System.out.println("Consumer:->Closing connection");
- if (consumer != null)
- consumer.close();
- if (session != null)
- session.close();
- if (connection != null)
- connection.close();
- }
-
-
- public void onMessage(Message message) {
- try {
- if (message instanceof TextMessage) {
- TextMessage txtMsg = (TextMessage) message;
- String msg = txtMsg.getText();
- System.out.println("Consumer:->Received: " + msg);
- } else {
- System.out.println("Consumer:->Received: " + message);
- }
- } catch (JMSException e) {
-
- e.printStackTrace();
- }
- }
- }
如果想主动的去接受消息,而不用消息监听的话,把consumer.setMessageListener(this)改为Message message = consumer.receive(),手动去调用MessageConsumer的receive方法即可。
下面是测试类Test.java:
java 代码
- package homework;
-
- import javax.jms.JMSException;
-
- public class Test {
-
-
-
-
- public static void main(String[] args) throws JMSException, Exception {
-
- ConsumerTool consumer = new ConsumerTool();
- ProducerTool producer = new ProducerTool();
-
- consumer.consumeMessage();
-
-
- Thread.sleep(500);
- producer.produceMessage("Hello, world!");
- producer.close();
-
-
- Thread.sleep(500);
- consumer.close();
- }
- }
ActiveMQ的一个简单实例-ActiveMQ接收+发送消息
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