ActiveMQ的一个简单示例(转)

最近由于公司项目需要，开始学习JMS，用的是ActiveMQ。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，写了一个简单的小例子，现在贴出来与大家分享。ProducerTool.java用于发送消息：java 代码 1. package homework; 2. 3. import javax.jms.Connection; 4. import javax.jms.DeliveryMode; 5. import javax.jms.Destination; 6. import javax.jms.JMSException; 7. import javax.jms.MessageProducer; 8. import javax.jms.Session; 9. import javax.jms.TextMessage; 10. 11. import org.apache.activemq.ActiveMQConnection; 12. import org.apache.activemq.ActiveMQConnectionFactory; 13. 14. public class ProducerTool { 15. 16. private String user = ActiveMQConnection.DEFAULT_USER; 17. 18. private String password = ActiveMQConnection.DEFAULT_PASSWORD; 19. 20. private String url = ActiveMQConnection.DEFAULT_BROKER_URL; 21. 22. private String subject = "TOOL.DEFAULT"; 23. 24. private Destination destination = null; 25. 26. private Connection connection = null; 27. 28. private Session session = null; 29. 30. private MessageProducer producer = null; 31. 32. // 初始化 33. private void initialize() throws JMSException, Exception { 34. ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory( 35. user, password, url); 36. connection = connectionFactory.createConnection(); 37. session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); 38. destination = session.createQueue(subject); 39. producer = session.createProducer(destination); 40. producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT); 41. } 42. 43. // 发送消息 44. public void produceMessage(String message) throws JMSException, Exception { 45. initialize(); 46. TextMessage msg = session.createTextMessage(message); 47. connection.start(); 48. System.out.println("Producer:->Sending message: " + message); 49. producer.send(msg); 50. System.out.println("Producer:->Message sent complete!"); 51. } 52. 53. // 关闭连接 54. public void close() throws JMSException { 55. System.out.println("Producer:->Closing connection"); 56. if (producer != null) 57. producer.close(); 58. if (session != null) 59. session.close(); 60. if (connection != null) 61. connection.close(); 62. } 63. } 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 1. package homework; 2. 3. import javax.jms.Connection; 4. import javax.jms.Destination; 5. import javax.jms.JMSException; 6. import javax.jms.MessageConsumer; 7. import javax.jms.Session; 8. import javax.jms.MessageListener; 9. import javax.jms.Message; 10. import javax.jms.TextMessage; 11. 12. import org.apache.activemq.ActiveMQConnection; 13. import org.apache.activemq.ActiveMQConnectionFactory; 14. 15. public class ConsumerTool implements MessageListener { 16. 17. private String user = ActiveMQConnection.DEFAULT_USER; 18. 19. private String password = ActiveMQConnection.DEFAULT_PASSWORD; 20. 21. private String url = ActiveMQConnection.DEFAULT_BROKER_URL; 22. 23. private String subject = "TOOL.DEFAULT"; 24. 25. private Destination destination = null; 26. 27. private Connection connection = null; 28. 29. private Session session = null; 30. 31. private MessageConsumer consumer = null; 32. 33. // 初始化 34. private void initialize() throws JMSException, Exception { 35. ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory( 36. user, password, url); 37. connection = connectionFactory.createConnection(); 38. session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); 39. destination = session.createQueue(subject); 40. consumer = session.createConsumer(destination); 41. 42. } 43. 44. // 消费消息 45. public void consumeMessage() throws JMSException, Exception { 46. initialize(); 47. connection.start(); 48. 49. System.out.println("Consumer:->Begin listening..."); 50. // 开始监听 51. consumer.setMessageListener(this); 52. // Message message = consumer.receive(); 53. } 54. 55. // 关闭连接 56. public void close() throws JMSException { 57. System.out.println("Consumer:->Closing connection"); 58. if (consumer != null) 59. consumer.close(); 60. if (session != null) 61. session.close(); 62. if (connection != null) 63. connection.close(); 64. } 65. 66. // 消息处理函数 67. public void onMessage(Message message) { 68. try { 69. if (message instanceof TextMessage) { 70. TextMessage txtMsg = (TextMessage) message; 71. String msg = txtMsg.getText(); 72. System.out.println("Consumer:->Received: " + msg); 73. } else { 74. System.out.println("Consumer:->Received: " + message); 75. } 76. } catch (JMSException e) { 77. // TODO Auto-generated catch block 78. e.printStackTrace(); 79. } 80. } 81. } 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 1. package homework; 2. 3. import javax.jms.JMSException; 4. 5. public class Test { 6. 7. /** 8. * @param args 9. */ 10. public static void main(String[] args) throws JMSException, Exception { 11. // TODO Auto-generated method stub 12. ConsumerTool consumer = new ConsumerTool(); 13. ProducerTool producer = new ProducerTool(); 14. // 开始监听 15. consumer.consumeMessage(); 16. 17. // 延时500毫秒之后发送消息 18. Thread.sleep(500); 19. producer.produceMessage("Hello, world!"); 20. producer.close(); 21. 22. // 延时500毫秒之后停止接受消息 23. Thread.sleep(500); 24. consumer.close(); 25. } 26. }