activeMQ_helloworld(一)

一、activeMQ下载，直接在Linux上wget http://mirror.bit.edu.cn/apache//activemq/5.14.5/apache-activemq-5.14.5-bin.tar.gz

使用tar -zxvf 解压即可，启动activeMQ很简单，直接cd到bin目录，./activemq start即可

activeMQ的默认端口是61616，后台管理界面的端口是8161，如果你的防火墙拦截了这些端口，你需要打开这些端口或者是关闭防火墙，

vim /etc/sysconfig/iptables

修改后需要让修改生效，键入/etc/init.d/iptables restart这条命令即可

2、打开管理界面http://192.168.243.128:8161/admin，输入用户名admin，密码admin，可以看到以下界面

二、生产者代码

 package com.aciveMQ;

 import javax.jms.Connection;
 import javax.jms.ConnectionFactory;
 import javax.jms.JMSException;
 import javax.jms.MessageProducer;
 import javax.jms.Queue;
 import javax.jms.Session;
 import javax.jms.TextMessage;

 import org.apache.activemq.ActiveMQConnectionFactory;

 public class Producer {

     private static final String BROKER_URL = "tcp://192.168.243.128:61616";

     public static void main(String[] args) {
         ConnectionFactory connectionFactory;// 连接工厂
         Connection connection = null;// 连接
         Session session = null;// 会话
         Queue destination;// 目标
         MessageProducer messageProducer;// 消息生产者

         connectionFactory = new ActiveMQConnectionFactory(BROKER_URL);

         try {
             connection = connectionFactory.createConnection();

             // 第一个参数表示是否加事物操作，第二个参数Session.AUTO_ACKNOWLEDGE表示自动确认接收，
             //
             session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
             destination = session.createQueue("myFirstQueue");// 创建一个叫做myFirstQueue的目标队列

             messageProducer = session.createProducer(destination);// 创建消息生产者
             TextMessage tm = session.createTextMessage("hello world");

             connection.start();

             messageProducer.send(tm);
             session.commit();// 启动了事物就必须提交，否则不能发消息
         } catch (JMSException e) {
             e.printStackTrace();
         } finally {
             if (connection != null) {
                 try {
                     session.close();
                     connection.close();
                 } catch (JMSException e) {
                     e.printStackTrace();
                 }
             }

         }
     }

 }

2、消费者

 package com.aciveMQ;

 import javax.jms.Connection;
 import javax.jms.ConnectionFactory;
 import javax.jms.JMSException;
 import javax.jms.MessageConsumer;
 import javax.jms.Queue;
 import javax.jms.Session;
 import javax.jms.TextMessage;

 import org.apache.activemq.ActiveMQConnectionFactory;

 /**
  * @author may
  *
  */
 public class Consumer {
     private static final String BROKER_URL = "tcp://192.168.243.128:61616";

     public static void main(String[] args) {

         ConnectionFactory connectionFactory = null;// 连接工厂
         Connection connection = null;// 连接
         Session session = null;// 会话
         Queue destination;// 目标
         MessageConsumer messageConsumer;

         try {
             connectionFactory = new ActiveMQConnectionFactory(BROKER_URL);
             connection = connectionFactory.createConnection();
             // 第一个参数表示是否加事物操作，第二个参数Session.AUTO_ACKNOWLEDGE表示自动确认接收，
             // 消费消息不需要加事物
             session = connection.createSession(Boolean.FALSE, Session.AUTO_ACKNOWLEDGE);
             destination = session.createQueue("myFirstQueue");// 创建一个叫做myFirstQueue的目标主题
             messageConsumer = session.createConsumer(destination);

             connection.start();

             // receive（long argue）在取到队列中的消息后，会按每1s钟的时间再次读取
             TextMessage textMessage = (TextMessage) messageConsumer.receive();
             if (textMessage != null) {

                 System.out.println(textMessage.getText());

             }

             // System.out.println(textMessage);

         } catch (JMSException e) {
             e.printStackTrace();
         } finally {
             if (connection != null) {
                 try {
                     session.close();
                     connection.close();
                 } catch (JMSException e) {
                     e.printStackTrace();
                 }
             }

         }

     }

 }

3、pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.</modelVersion>

    <groupId>com.aciveMQ</groupId>
    <artifactId>activeMQ_hello</artifactId>
    <version>0.0.-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>activeMQ_hello</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.apache.activemq</groupId>
            <artifactId>activemq-all</artifactId>
            <version>5.14.</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.</version>
            <scope>test</scope>
        </dependency>

    </dependencies>
</project>

三、测试
启动生产者，然后再启动消费者，就会输出hello world。