åœ?Java 里有 JMS 的多个实玎ͼŒActiveMQ 是Apache出品åQŒæœ€‹¹è¡Œçš„，能力强劲的开源消息æ€Èº¿ã€‚ActiveMQ 是一个完全支持JMS1.1å’ŒJ2EE 1.4规范çš?JMS Provider实现ã€?/p>

       JMS 定义了两¿Uæ–¹å¼ï¼šQuereåQˆç‚¹å¯¹ç‚¹åQ‰ï¼›TopicåQˆå‘å¸?订阅åQ‰ã€?/p>

       ConnectionFactory 是连接工厂，负责创徏Connection。Connection 负责创徏 Session。Destination 是消息的目的地ã€?/p>

       Session 创徏 MessageProduceråQˆç”¨æ¥å‘消息åQ?å’?MessageConsumeråQˆç”¨æ¥æŽ¥æ”¶æ¶ˆæ¯ï¼‰ã€?/p>

       ActiveMQ的官方网址åQ?a >http://activemq.apache.org。在此可以下载ActiveMQ的最新版本和阅读相关文档ã€?/p>

       下面是ä‹É用ActiveMQ发送和接收消息的JAVA实现åQ?/p>

       1、消息发送è€?/p>

       package com.jmsd;

       import javax.jms.BytesMessage;
import javax.jms.Connection;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MapMessage;
import javax.jms.MessageProducer;
import javax.jms.ObjectMessage;
import javax.jms.Session;
import javax.jms.StreamMessage;
import javax.jms.TextMessage;

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

/**
* 说明åQ?activemq send message
*
* @author xajava
* @version 创徏旉™—´åQ?012-10-24 下午1:22:40
*/
public class JmsSender {

private String USER = ActiveMQConnection.DEFAULT_USER;
private String PASSWORD = ActiveMQConnection.DEFAULT_PASSWORD;
private String URL = ActiveMQConnection.DEFAULT_BROKER_URL;
private String SUBJECT = "ActiveMQ.Demo";

private Destination destination = null;
private Connection conn = null;
private Session session = null;
private MessageProducer producer = null;

// 初始�br /> private void initialize() throws JMSException, Exception {
// ˜qžæŽ¥å·¥åŽ‚
ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(USER, PASSWORD, URL);
conn = connectionFactory.createConnection();
// 事务性会话，自动¼‹®è®¤æ¶ˆæ¯
session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
// 消息的目的地åQˆQueue/TopicåQ?br />destination = session.createQueue(SUBJECT);
// destination = session.createTopic(SUBJECT);
// 消息的提供者（生äñ”者）
producer = session.createProducer(destination);
// 不持久化消息
producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
}

public void sendMessage(String msgType) throws JMSException, Exception {
initialize();
// ˜qžæŽ¥åˆ°JMS提供者（服务器）
conn.start();
// 发送文本消�br />if ("text".equals(msgType)) {
String textMsg = "ActiveMQ Text Message!";
TextMessage msg = session.createTextMessage();
// TextMessage msg = session.createTextMessage(textMsg);
msg.setText(textMsg);
producer.send(msg);
}
// 发送Map消息
if ("map".equals(msgType)) {
MapMessage msg = session.createMapMessage();
msg.setBoolean("boolean", true);
msg.setShort("short", (short) 0);
msg.setLong("long", 123456);
msg.setString("MapMessage", "ActiveMQ Map Message!");
producer.send(msg);
}
// 发送流消息
if ("stream".equals(msgType)) {
String streamValue = "ActiveMQ stream Message!";
StreamMessage msg = session.createStreamMessage();
msg.writeString(streamValue);
msg.writeBoolean(false);
msg.writeLong(1234567890);
producer.send(msg);
}
// 发送对象消�br />if ("object".equals(msgType)) {
JmsObjectMessageBean jmsObject = new JmsObjectMessageBean("ActiveMQ Object Message", 18, false);
ObjectMessage msg = session.createObjectMessage();
msg.setObject(jmsObject);
producer.send(msg);
}
// 发送字节消�br />if ("bytes".equals(msgType)) {
String byteValue = "字节消息";
BytesMessage msg = session.createBytesMessage();
msg.writeBytes(byteValue.getBytes());
producer.send(msg);
}
}

// 关闭˜qžæŽ¥
public void close() throws JMSException {
if (producer != null)
producer.close();
if (session != null)
session.close();
if (conn != null)
conn.close();
}

}

2、消息接收�/p>

package com.jmsd;

import java.util.Enumeration;

import javax.jms.BytesMessage;
import javax.jms.Connection;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MapMessage;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.ObjectMessage;
import javax.jms.Session;
import javax.jms.StreamMessage;
import javax.jms.TextMessage;

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

/**
* 说明åQ?br /> *
* @author xajava
* @version 创徏旉™—´åQ?012-10-24 下午2:06:48
*/
public class JmsReceiver implements MessageListener {

private String USER = ActiveMQConnection.DEFAULT_USER;
private String PASSWORD = ActiveMQConnection.DEFAULT_PASSWORD;
private String URL = ActiveMQConnection.DEFAULT_BROKER_URL;
private String SUBJECT = "ActiveMQ.Demo";

private Destination dest = null;
private Connection conn = null;
private Session session = null;
private MessageConsumer consumer = null;

private boolean stop = false;

// 初始�br /> private void initialize() throws JMSException, Exception {
  // ˜qžæŽ¥å·¥åŽ‚是用户创å»ø™¿žæŽ¥çš„对象.
  ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(USER, PASSWORD, URL);
  // ˜qžæŽ¥å·¥åŽ‚创徏一个jms connection
  conn = connectionFactory.createConnection();
  // 是生产和消费的一个单¾U¿ç¨‹ä¸Šä¸‹æ–‡ã€‚会话用于创建消息的生äñ”者，消费者和消息。会话提供了一个事务性的上下文ã€?br />  session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE); // 不支持事åŠ?br />  // 目的地是客户用来指定他生产消息的目标˜q˜æœ‰ä»–消è´ÒŽ¶ˆæ¯çš„来源的对è±?
  dest = session.createQueue(SUBJECT);
  // dest = session.createTopic(SUBJECT);
  // 会话创徏消息的生产者将消息发送到目的åœ?br />  consumer = session.createConsumer(dest);
}

/**
  * 消费消息
  *
  * @throws JMSException
  * @throws Exception
  */
public void receiveMessage() throws JMSException, Exception {
  initialize();
  conn.start();
  consumer.setMessageListener(this);
  // ½{‰å¾…接收消息
  while (!stop) {
   Thread.sleep(5000);
  }

}

@SuppressWarnings("rawtypes")
@Override
public void onMessage(Message msg) {
  try {
   if (msg instanceof TextMessage) {
    TextMessage message = (TextMessage) msg;
    System.out.println("------Received TextMessage------");
    System.out.println(message.getText());
   } else if (msg instanceof MapMessage) {
    MapMessage message = (MapMessage) msg;
    System.out.println("------Received MapMessage------");
    System.out.println(message.getLong("long"));
    System.out.println(message.getBoolean("boolean"));
    System.out.println(message.getShort("short"));
    System.out.println(message.getString("MapMessage"));
    System.out.println("------Received MapMessage for while------");
    Enumeration enumer = message.getMapNames();
    while (enumer.hasMoreElements()) {
     Object obj = enumer.nextElement();
     System.out.println(message.getObject(obj.toString()));
    }
   } else if (msg instanceof StreamMessage) {
    StreamMessage message = (StreamMessage) msg;
    System.out.println("------Received StreamMessage------");
    System.out.println(message.readString());
    System.out.println(message.readBoolean());
    System.out.println(message.readLong());
   } else if (msg instanceof ObjectMessage) {
    System.out.println("------Received ObjectMessage------");
    ObjectMessage message = (ObjectMessage) msg;
    JmsObjectMessageBean jmsObject = (JmsObjectMessageBean) message.getObject();
    System.out.println(jmsObject.getUserName() + "__" + jmsObject.getAge() + "__" + jmsObject.isFlag());
   } else if (msg instanceof BytesMessage) {
    System.out.println("------Received BytesMessage------");
    BytesMessage message = (BytesMessage) msg;
    byte[] byteContent = new byte[1024];
    int length = -1;
    StringBuffer content = new StringBuffer();
    while ((length = message.readBytes(byteContent)) != -1) {
     content.append(new String(byteContent, 0, length));
    }
    System.out.println(content.toString());
   } else {
    System.out.println(msg);
   }
   stop = true;
  } catch (JMSException e) {
   e.printStackTrace();
  } finally {
   try {
    this.close();
   } catch (JMSException e) {
    e.printStackTrace();
   }
  }
}

// 关闭˜qžæŽ¥
public void close() throws JMSException {
  System.out.println("Consumer:->Closing connection");
  if (consumer != null)
   consumer.close();
  if (session != null)
   session.close();
  if (conn != null)
   conn.close();
}
}

3、对象消�/p>

package com.jmsd;

import java.io.Serializable;

/**
* 说明åQ?JMS 对象消息½CÞZ¾‹å¯¹è±¡
*
* @author xajava
* @version 创徏旉™—´åQ?012-10-24 下午1:56:07
*/
public class JmsObjectMessageBean implements Serializable {

private static final long serialVersionUID = 2620024932905963095L;

private String userName;
private int age = 16;
private boolean flag = true;

public JmsObjectMessageBean(String userName,int age,boolean flag){
  this.setUserName(userName);
  this.setAge(age);
  this.setFlag(flag);
}

public String getUserName() {
  return userName;
}

public void setUserName(String userName) {
  this.userName = userName;
}

public int getAge() {
  return age;
}

public void setAge(int age) {
  this.age = age;
}

public boolean isFlag() {
  return flag;
}

public void setFlag(boolean flag) {
  this.flag = flag;
}

}
4、测试类

package com.jmsd;

import javax.jms.JMSException;

/**
* 说明åQ?
*
* @author  xajava
* @version 创徏旉™—´åQ?012-10-22 下午4:33:17
*/
public class Test {

public static void main(String[] args) throws JMSException, Exception {
  JmsSender sender = new JmsSender();
  JmsReceiver receiver = new JmsReceiver();
 
  sender.sendMessage("bytes");
  sender.close();
 
  receiver.receiveMessage();
  receiver.close();
 
}   
}

package com.jmsd;

import javax.jms.JMSException;

/**
* 说明åQ?
*
* @author  xajava
* @version 创徏旉™—´åQ?012-10-22 下午4:33:17
*/
public class Test {

public static void main(String[] args) throws JMSException, Exception {
JmsSender sender = new JmsSender();
JmsReceiver receiver = new JmsReceiver();

sender.sendMessage("bytes");
sender.close();

receiver.receiveMessage();
receiver.close();

}   
}
package com.jmsd;

import javax.jms.JMSException;

/**
* 说明åQ?
*
* @author  xajava
* @version 创徏旉™—´åQ?012-10-22 下午4:33:17
*/
public class Test {

public static void main(String[] args) throws JMSException, Exception {
  JmsSender sender = new JmsSender();
  JmsReceiver receiver = new JmsReceiver();
 
  sender.sendMessage("bytes");
  sender.close();
 
  receiver.receiveMessage();
  receiver.close();
 
}   
}