深入浅出JMS(三)--ActiveMQ简单的HelloWorld实例

第一篇博文深入浅出JMS(一)–JMS基本概念，我们介绍了JMS的两种消息模型：点对点和发布订阅模型，以及消息被消费的两个方式：同步和异步，JMS编程模型的对象，最后说了JMS的优点。

第二篇博文深入浅出JMS(二)–ActiveMQ简单介绍以及安装，我们介绍了消息中间件ActiveMQ，安装，启动，以及优缺点。

这篇博文，我们使用ActiveMQ为大家实现一种点对点的消息模型。如果你对点对点模型的认识较浅，可以看一下第一篇博文的介绍。

JMS其实并没有想象的那么高大上，看完这篇博文之后，你就知道什么叫简单，下面直接进入主题。

开发环境

我们使用的是ActiveMQ 5.11.1 Release的Windows版，官网最新版是ActiveMQ 5.12.0 Release，大家可以自行下载，下载地址。

需要注意的是，开发时候，要将apache-activemq-5.11.1-bin.zip解压缩后里面的activemq-all-5.11.1.jar包加入到classpath下面，这个包包含了所有jms接口api的实现。

搭建开发环境

建立项目 

我们只需要建立一个java项目就可以了，导入jar包，项目截图： 



点对点的消息模型，只需要一个消息生成者和消息消费者，下面我们编写代码。

package com.wpl.activemq.test;

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;

/**

 * @author wpl

 * */

public class JMS_Producer {

//默认连接名
private static final String USERNAME=ActiveMQConnection.DEFAULT_USER;
//默认连接密码
private static final String PASSWORD=ActiveMQConnection.DEFAULT_PASSWORD;
//默认连接地址
private static final String BROKEURL=ActiveMQConnection.DEFAULT_BROKER_URL;
//发送的消息数量
private static final int totalNum=10;

public static void main(String[] args) {

//连接工厂
ConnectionFactory connectionFactory;
//连接
Connection connection = null;
//会话，接受或者发送消息的线程
Session session;
//消息的目的地
Destination destination;
//消息生产者
MessageProducer messageProducer;

//实例化连接工厂
connectionFactory=new ActiveMQConnectionFactory(USERNAME, PASSWORD, BROKEURL);

try {
//通过连接工厂获取连接
connection=connectionFactory.createConnection();
//启动连接
connection.start();
//创建session
session=connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
//创建一个名为Helloworld的消息队列
destination=session.createQueue("HelloWorld");
//创建消息生产者
messageProducer=session.createProducer(destination);
//发送消息
sendMessage(session, messageProducer);
session.commit();

} catch (JMSException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
if(connection!=null)
try {
connection.close();
} catch (JMSException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}

//消息发送的函数
public static void sendMessage(Session session,MessageProducer messageProducer) throws JMSException
{
for(int i=0;i<totalNum;i++)
{
//创建一个文本消息
TextMessage textMessage=session.createTextMessage("ActiveMQ消息:"+i);
//打印出来
System.out.println("ActiveMQ发送消息:"+i);
//消息生产者发送消息
messageProducer.send(textMessage);
}

}

}

<ul style="box-sizing: border-box; font-family: "microsoft yahei"; font-size: 14px; line-height: 26px;"><li style="box-sizing: border-box;">编写生产者</li></ul><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); border: 1px solid rgba(128, 128, 128, 0.0745098); border-radius: 0px; background-color: rgba(128, 128, 128, 0.0470588);"><code class="language-java hljs  has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">package</span> com.tgb.activemq;

<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> javax.jms.Connection;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> javax.jms.ConnectionFactory;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> javax.jms.Destination;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> javax.jms.JMSException;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> javax.jms.MessageProducer;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> javax.jms.Session;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> javax.jms.TextMessage;

<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> org.apache.activemq.ActiveMQConnection;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> org.apache.activemq.ActiveMQConnectionFactory;
<span class="hljs-javadoc" style="color: rgb(136, 0, 0); box-sizing: border-box;">/**
* 消息的生产者（发送者）
*<span class="hljs-javadoctag" style="color: rgb(102, 0, 102); box-sizing: border-box;"> @author</span> liang
*
*/</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">class</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">JMSProducer</span> {</span>

<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//默认连接用户名</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</span> String USERNAME = ActiveMQConnection.DEFAULT_USER;
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//默认连接密码</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</span> String PASSWORD = ActiveMQConnection.DEFAULT_PASSWORD;
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//默认连接地址</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</span> String BROKEURL = ActiveMQConnection.DEFAULT_BROKER_URL;
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//发送的消息数量</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> SENDNUM = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">10</span>;

<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">main</span>(String[] args) {
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//连接工厂</span>
ConnectionFactory connectionFactory;
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//连接</span>
Connection connection = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>;
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//会话 接受或者发送消息的线程</span>
Session session;
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//消息的目的地</span>
Destination destination;
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//消息生产者</span>
MessageProducer messageProducer;
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//实例化连接工厂</span>
connectionFactory = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> ActiveMQConnectionFactory(JMSProducer.USERNAME, JMSProducer.PASSWORD, JMSProducer.BROKEURL);

<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">try</span> {
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//通过连接工厂获取连接</span>
connection = connectionFactory.createConnection();
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//启动连接</span>
connection.start();
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//创建session</span>
session = connection.createSession(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>, Session.AUTO_ACKNOWLEDGE);
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//创建一个名称为HelloWorld的消息队列</span>
destination = session.createQueue(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"HelloWorld"</span>);
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//创建消息生产者</span>
messageProducer = session.createProducer(destination);
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//发送消息</span>
sendMessage(session, messageProducer);

session.commit();

} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">catch</span> (Exception e) {
e.printStackTrace();
}<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">finally</span>{
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span>(connection != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>){
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">try</span> {
connection.close();
} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">catch</span> (JMSException e) {
e.printStackTrace();
}
}
}

}
<span class="hljs-javadoc" style="color: rgb(136, 0, 0); box-sizing: border-box;">/**
* 发送消息
*<span class="hljs-javadoctag" style="color: rgb(102, 0, 102); box-sizing: border-box;"> @param</span> session
*<span class="hljs-javadoctag" style="color: rgb(102, 0, 102); box-sizing: border-box;"> @param</span> messageProducer  消息生产者
*<span class="hljs-javadoctag" style="color: rgb(102, 0, 102); box-sizing: border-box;"> @throws</span> Exception
*/</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">sendMessage</span>(Session session,MessageProducer messageProducer) <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">throws</span> Exception{
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">for</span> (<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> i = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>; i < JMSProducer.SENDNUM; i++) {
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//创建一条文本消息 </span>
TextMessage message = session.createTextMessage(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"ActiveMQ 发送消息"</span> +i);
System.out.println(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"发送消息：Activemq 发送消息"</span> + i);
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//通过消息生产者发出消息 </span>
messageProducer.send(message);
}

}
}
</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li><li style="box-sizing: border-box; padding: 0px 5px;">25</li><li style="box-sizing: border-box; padding: 0px 5px;">26</li><li style="box-sizing: border-box; padding: 0px 5px;">27</li><li style="box-sizing: border-box; padding: 0px 5px;">28</li><li style="box-sizing: border-box; padding: 0px 5px;">29</li><li style="box-sizing: border-box; padding: 0px 5px;">30</li><li style="box-sizing: border-box; padding: 0px 5px;">31</li><li style="box-sizing: border-box; padding: 0px 5px;">32</li><li style="box-sizing: border-box; padding: 0px 5px;">33</li><li style="box-sizing: border-box; padding: 0px 5px;">34</li><li style="box-sizing: border-box; padding: 0px 5px;">35</li><li style="box-sizing: border-box; padding: 0px 5px;">36</li><li style="box-sizing: border-box; padding: 0px 5px;">37</li><li style="box-sizing: border-box; padding: 0px 5px;">38</li><li style="box-sizing: border-box; padding: 0px 5px;">39</li><li style="box-sizing: border-box; padding: 0px 5px;">40</li><li style="box-sizing: border-box; padding: 0px 5px;">41</li><li style="box-sizing: border-box; padding: 0px 5px;">42</li><li style="box-sizing: border-box; padding: 0px 5px;">43</li><li style="box-sizing: border-box; padding: 0px 5px;">44</li><li style="box-sizing: border-box; padding: 0px 5px;">45</li><li style="box-sizing: border-box; padding: 0px 5px;">46</li><li style="box-sizing: border-box; padding: 0px 5px;">47</li><li style="box-sizing: border-box; padding: 0px 5px;">48</li><li style="box-sizing: border-box; padding: 0px 5px;">49</li><li style="box-sizing: border-box; padding: 0px 5px;">50</li><li style="box-sizing: border-box; padding: 0px 5px;">51</li><li style="box-sizing: border-box; padding: 0px 5px;">52</li><li style="box-sizing: border-box; padding: 0px 5px;">53</li><li style="box-sizing: border-box; padding: 0px 5px;">54</li><li style="box-sizing: border-box; padding: 0px 5px;">55</li><li style="box-sizing: border-box; padding: 0px 5px;">56</li><li style="box-sizing: border-box; padding: 0px 5px;">57</li><li style="box-sizing: border-box; padding: 0px 5px;">58</li><li style="box-sizing: border-box; padding: 0px 5px;">59</li><li style="box-sizing: border-box; padding: 0px 5px;">60</li><li style="box-sizing: border-box; padding: 0px 5px;">61</li><li style="box-sizing: border-box; padding: 0px 5px;">62</li><li style="box-sizing: border-box; padding: 0px 5px;">63</li><li style="box-sizing: border-box; padding: 0px 5px;">64</li><li style="box-sizing: border-box; padding: 0px 5px;">65</li><li style="box-sizing: border-box; padding: 0px 5px;">66</li><li style="box-sizing: border-box; padding: 0px 5px;">67</li><li style="box-sizing: border-box; padding: 0px 5px;">68</li><li style="box-sizing: border-box; padding: 0px 5px;">69</li><li style="box-sizing: border-box; padding: 0px 5px;">70</li><li style="box-sizing: border-box; padding: 0px 5px;">71</li><li style="box-sizing: border-box; padding: 0px 5px;">72</li><li style="box-sizing: border-box; padding: 0px 5px;">73</li><li style="box-sizing: border-box; padding: 0px 5px;">74</li><li style="box-sizing: border-box; padding: 0px 5px;">75</li><li style="box-sizing: border-box; padding: 0px 5px;">76</li><li style="box-sizing: border-box; padding: 0px 5px;">77</li><li style="box-sizing: border-box; padding: 0px 5px;">78</li><li style="box-sizing: border-box; padding: 0px 5px;">79</li><li style="box-sizing: border-box; padding: 0px 5px;">80</li><li style="box-sizing: border-box; padding: 0px 5px;">81</li><li style="box-sizing: border-box; padding: 0px 5px;">82</li><li style="box-sizing: border-box; padding: 0px 5px;">83</li><li style="box-sizing: border-box; padding: 0px 5px;">84</li><li style="box-sizing: border-box; padding: 0px 5px;">85</li><li style="box-sizing: border-box; padding: 0px 5px;">86</li><li style="box-sizing: border-box; padding: 0px 5px;">87</li><li style="box-sizing: border-box; padding: 0px 5px;">88</li><li style="box-sizing: border-box; padding: 0px 5px;">89</li><li style="box-sizing: border-box; padding: 0px 5px;">90</li></ul>

编写消费者
package com.wpl.activemq.test;

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;

/**

 * 消息接收者

 * 

 * @author wpl

 * 

 */

public class JMS_Consumer {

// 默认连接名
private static final String USERNAME = ActiveMQConnection.DEFAULT_USER;
// 默认连接密码
private static final String PASSWORD = ActiveMQConnection.DEFAULT_PASSWORD;
// 默认连接地址
private static final String BROKEURL = ActiveMQConnection.DEFAULT_BROKER_URL;

public static void main(String[] args) {

//连接工厂
ConnectionFactory connectionFactory;
//连接
Connection connection=null;
//会话，接受消息和发送消息的线程
Session session;
//消息的目的地
Destination destination;
//消息的消费者
MessageConsumer consumer;

//实例化连接工厂
connectionFactory=new ActiveMQConnectionFactory(USERNAME,PASSWORD,BROKEURL);

try {
//通过连接工厂创建连接
connection=connectionFactory.createConnection();
//启动连接
connection.start();
//创建session
session=connection.createSession(false,Session.AUTO_ACKNOWLEDGE);
//创建一个名为Helloworld的消息队列
destination=session.createQueue("HelloWorld");

//创建消费者
consumer=session.createConsumer(destination);
//显示消息的哈
while(true)
{
TextMessage textMessage=(TextMessage) consumer.receive(10000);
if(textMessage!=null)
{
System.out.println("ActiveMQ接受的消息："+textMessage.getText());
}else{
break;
}

}

} catch (JMSException e) {

e.printStackTrace();
}

}

}

<code class="language-java hljs  has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">package</span> com.tgb.activemq;

<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> javax.jms.Connection;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> javax.jms.ConnectionFactory;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> javax.jms.Destination;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> javax.jms.JMSException;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> javax.jms.MessageConsumer;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> javax.jms.Session;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> javax.jms.TextMessage;

<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> org.apache.activemq.ActiveMQConnection;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> org.apache.activemq.ActiveMQConnectionFactory;
<span class="hljs-javadoc" style="color: rgb(136, 0, 0); box-sizing: border-box;">/**
* 消息的消费者（接受者）
*<span class="hljs-javadoctag" style="color: rgb(102, 0, 102); box-sizing: border-box;"> @author</span> liang
*
*/</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">class</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">JMSConsumer</span> {</span>

<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</span> String USERNAME = ActiveMQConnection.DEFAULT_USER;<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//默认连接用户名</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</span> String PASSWORD = ActiveMQConnection.DEFAULT_PASSWORD;<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//默认连接密码</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</span> String BROKEURL = ActiveMQConnection.DEFAULT_BROKER_URL;<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//默认连接地址</span>

<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">main</span>(String[] args) {
ConnectionFactory connectionFactory;<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//连接工厂</span>
Connection connection = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>;<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//连接</span>

Session session;<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//会话 接受或者发送消息的线程</span>
Destination destination;<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//消息的目的地</span>

MessageConsumer messageConsumer;<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//消息的消费者</span>

<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//实例化连接工厂</span>
connectionFactory = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> ActiveMQConnectionFactory(JMSConsumer.USERNAME, JMSConsumer.PASSWORD, JMSConsumer.BROKEURL);

<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">try</span> {
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//通过连接工厂获取连接</span>
connection = connectionFactory.createConnection();
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//启动连接</span>
connection.start();
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//创建session</span>
session = connection.createSession(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">false</span>, Session.AUTO_ACKNOWLEDGE);
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//创建一个连接HelloWorld的消息队列</span>
destination = session.createQueue(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"HelloWorld"</span>);
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//创建消息消费者</span>
messageConsumer = session.createConsumer(destination);

<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">while</span> (<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>) {
TextMessage textMessage = (TextMessage) messageConsumer.receive(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">100000</span>);
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span>(textMessage != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>){
System.out.println(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"收到的消息:"</span> + textMessage.getText());
}<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">break</span>;
}
}

} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">catch</span> (JMSException e) {
e.printStackTrace();
}

}
}
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运行

首先，启动ActiveMQ，如何启动ActiveMQ如何启动，请看第二篇博文。在浏览器中输入：http://localhost:8161/admin/，然后开始执行：

运行发送者，eclipse控制台输出，如下图： 


 

此时，我们先看一下ActiveMQ服务器，Queues内容如下： 



我们可以看到创建了一个名称为HelloWorld的消息队列，队列中有10条消息未被消费，我们也可以通过Browse查看是哪些消息，如下图： 



如果这些队列中的消息，被删除，消费者则无法消费。

我们继续运行一下消费者，eclipse控制台打印消息，如下： 


 

此时，我们先看一下ActiveMQ服务器，Queues内容如下： 



我们可以看到HelloWorld的消息队列发生变化，多一个消息者，队列中的10条消息被消费了，点击Browse查看，已经为空了。 

点击Active Consumers，我们可以看到这个消费者的详细信息： 



我们的实例到此就结束了，大家可以自己多点ActiveMQ服务器的内容，进一步熟悉ActiveMQ。

总结

这篇博文我们实现了点对点的消息模型以及发送的一个同步消息，是不是非常的简单？

下面博文，我们将实现一个ActiveMQ和Spring整合的实例。

转载自：http://blog.csdn.net/jiuqiyuliang/article/details/48608237