前言

說(shuō)明

開(kāi)發(fā)環(huán)境：IDEA，Active MQ

項(xiàng)目構(gòu)建：Maven

軟件環(huán)境：Spring，Spring JMS，Active MQ

項(xiàng)目描述：Spring JMS與Active MQ進(jìn)行通訊

目的

入門(mén)Spring JMS、Active MQ，使用Spring JMS向Active MQ的Message Queue發(fā)消息和讀消息。

PS：
demo整合過(guò)程均親測(cè)，按順序編碼已測(cè)試通過(guò)
項(xiàng)目代碼有注釋?zhuān)晒├砬甯鱾€(gè)class和各個(gè)方法塊及屬性的作用。

編碼

1. 開(kāi)啟Active MQ服務(wù)

2. 使用maven導(dǎo)入依賴(lài)庫(kù)

pom.xml

<dependencies>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.apache.activemq</groupId>
            <artifactId>activemq-all</artifactId>
            <version>5.9.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jms</artifactId>
            <version>4.0.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>4.0.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>4.0.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.apache.xbean</groupId>
            <artifactId>xbean-spring</artifactId>
            <version>3.16</version>
        </dependency>

    </dependencies>

3. 創(chuàng)建application.properties，封裝Message Queue的配置

application.properties

jms.broker.url=tcp://localhost:61616
jms.queue.name=bar

4. JMS全局配置，配置與ActiveMQ的連接

JMSConfiguration.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:amq="http://activemq.apache.org/schema/core"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://activemq.apache.org/schema/core
       http://activemq.apache.org/schema/core/activemq-core-5.8.0.xsd">

    <!-- 配置與ActiveMQ的連接 -->

    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location">
            <value>application.properties</value>
        </property>
    </bean>

    <!-- Activemq connection factory -->
    <bean id="amqConnectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
        <constructor-arg index="0" value="${jms.broker.url}" />
        <property name="useAsyncSend" value="true" />
    </bean>

    <!-- ConnectionFactory Definition -->
    <bean id="connectionFactory" class="org.springframework.jms.connection.CachingConnectionFactory">
        <constructor-arg ref="amqConnectionFactory" />
    </bean>

    <!--  Default Destination Queue Definition-->
    <bean id="defaultDestination" class="org.apache.activemq.command.ActiveMQQueue">
        <constructor-arg index="0" value="${jms.queue.name}" />
    </bean>

    <!-- JmsTemplate Definition -->
    <bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
        <property name="connectionFactory" ref="connectionFactory"/>
        <property name="defaultDestination" ref="defaultDestination"/>
    </bean>

    <!-- Message Sender Definition -->
    <bean id="messageSender" class="com.net.jms.MessageSender">
        <constructor-arg index="0" ref="jmsTemplate" />
    </bean>

</beans>

分析：

（1） 配置ActiveMQ提供的ActiveMQConnectionFactory

（2） 配置一個(gè)Spring JMS提供的CachingConnectionFactory

（3） 定義一個(gè)ActiveMQ Queue作為消息的接收Queue（即Destination）

（4） 創(chuàng)建JmsTemplate

（5） 自定義一個(gè)MessageSender，使用該JmsTemplate進(jìn)行消息發(fā)送

5. 創(chuàng)建MessageSender，提供發(fā)送消息的服務(wù)

MessageSender.java

package com.net.jms;

import org.springframework.jms.core.JmsTemplate;
import org.springframework.stereotype.Component;

/**
 * 發(fā)送消息的服務(wù)：發(fā)送字符串信息
 */

@Component
public class MessageSender {

    private final JmsTemplate jmsTemplate;

    public MessageSender(JmsTemplate jmsTemplate) {
        this.jmsTemplate = jmsTemplate;
    }

    public void send(final String text) {
        jmsTemplate.convertAndSend(text);
        System.out.println("send: " + text);
    }

}

作用：通過(guò)jmsTemplate發(fā)送一個(gè)字符串信息

6. 配置一個(gè)Listener來(lái)監(jiān)聽(tīng)和處理當(dāng)前的Message Queue

JMSReceiver.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!-- 配置一個(gè)Listener來(lái)監(jiān)聽(tīng)和處理當(dāng)前的Message Queue -->

    <!-- Message Receiver Definition -->
    <bean id="messageReceiver" class="com.net.jms.MessageReceiver" />

    <bean class="org.springframework.jms.listener.SimpleMessageListenerContainer">
        <property name="connectionFactory" ref="connectionFactory"/>
        <property name="destinationName" value="${jms.queue.name}"/>
        <property name="messageListener" ref="messageReceiver"/>
    </bean>

</beans>

自定義了一個(gè)MessageListener，且使用Spring提供的SimpleMessageListenerContainer作為Container。

7. 創(chuàng)建MessageListener的具體實(shí)現(xiàn)

MessageReceiver.java

package com.net.jms;

import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.TextMessage;

/**
 * 消息偵聽(tīng)器：監(jiān)聽(tīng)當(dāng)前的Message Queue
 * 從Queue中讀取消息，并輸出到當(dāng)前控制臺(tái)中
 */
public class MessageReceiver implements MessageListener {

    public void onMessage(Message message) {

        if (message instanceof TextMessage){

            TextMessage textMessage = (TextMessage) message;
            try {

                String text = textMessage.getText();
                System.out.println(String.format("Received: %s",text));
                try {

                    Thread.sleep(100);
                } catch (InterruptedException e){
                    e.printStackTrace();
                }
            } catch (JMSException e){
                e.printStackTrace();
            }
        }
    }
}

作用：從Queue中讀取消息，并輸出到當(dāng)前控制臺(tái)中。

8. 創(chuàng)建兩個(gè)測(cè)試類(lèi)，一個(gè)用于發(fā)送消息到ActiveMQ的MessageQueue中，一個(gè)用于從MessageQueue中讀取消息

SenderApp.java

package com.net;

import com.net.jms.MessageSender;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.util.StringUtils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 * 發(fā)送消息到ActiveMQ的Message Queue
 */
public class SenderApp {

    public static void main(String[] args) throws IOException {

        start("JMSConfiguration.xml");
    }

    public static void start(String configLocation) throws IOException {

        MessageSender sender = getMessageSender(configLocation);
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        System.out.println("Please input your message:");
        String text = br.readLine();
        while (!StringUtils.isEmpty(text)) {

            System.out.println(String.format("send message: %s", text));
            sender.send(text);
            text = br.readLine();
        }
    }

    public static MessageSender getMessageSender(String configLocation) {

        ApplicationContext context = new ClassPathXmlApplicationContext(configLocation);
        return (MessageSender) context.getBean("messageSender");
    }

}

ReceiverApp.java

package com.net;

import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * 從Message Queue中讀取消息
 */
public class ReceiverApp {

    public static void main(String[] args) {

        new ClassPathXmlApplicationContext("JMSConfiguration.xml", "JMSReceiver.xml");
    }

}

9. 測(cè)試：運(yùn)行SenderApp.java，在控制臺(tái)輸入消息，接著運(yùn)行ReceiverApp.java，結(jié)果如下

總結(jié)

到此，spring jms與activemq的通信就已經(jīng)集成結(jié)束了。