【ActiveMQ】ActiveMQ与Spring实现发邮件

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本文详细介绍如何利用ActiveMQ消息队列实现生产者与消费者的通信流程，并通过具体案例展示消息监听器的应用。

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消费者如何知道生产者的动静？当生产者发送了消息到ActiveMQ中的时候，消费者是如何轻松的获得该消息的。

这是由JMS提供的三种消息监听器实现的。我们先来了解基础概念：

1、MessageListener

这是JMS的一个接口，定义了一个用于处理接受到消息的onMessage方法，该接口仅仅一个这样的方法，

也仅仅有Message一个参数。他就是为了接受消息的。请见以下代码：

package com.consume;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.TextMessage;


public class ConsumerMessageListener implements MessageListener{

	public void onMessage(Message message) {
		TextMessage textMessage=(TextMessage) message;
		System.out.println("哈哈哈哈哈");
		try {
			System.out.println("消费者:"+textMessage.getText());
		} catch (JMSException e) {
			
			e.printStackTrace();
		}
		
	}
     
}

2、SessionAwareMessageListener

这个是由spring为我们提供的，他不是JMS的MessageListener，这个接口仅仅有一个方法，那就是onMessage

方法，有2个参数，一个参数用来接受当前的消息message，另一个发送消息的sesson对象。其中session对象就是

用来告诉消息的提供者发送回复消息的。

请看这个接口的定义：

请见以下代码：

@Component
public class ConsumerSessionAwareMessageListener implements SessionAwareMessageListener<Message> {

	private static final Log log = LogFactory.getLog(ConsumerSessionAwareMessageListener.class);

	@Autowired
	private JmsTemplate activeMqJmsTemplate;
	@Autowired
	private Destination sessionAwareQueue;
	@Autowired
	private MailBiz bailBiz;

	public synchronized void onMessage(Message message, Session session) {
		try {
			ActiveMQTextMessage msg = (ActiveMQTextMessage) message;
			final String ms = msg.getText();
			log.info("==>receive message:" + ms);
			MailParam mailParam = JSONObject.parseObject(ms, MailParam.class);// 转换成相应的对象
			if (mailParam == null) {
				return;
			}

			try {
				bailBiz.mailSend(mailParam);
			} catch (Exception e) {
				// 发送异常，重新放回队列
//				activeMqJmsTemplate.send(sessionAwareQueue, new MessageCreator() {
//					public Message createMessage(Session session) throws JMSException {
//						return session.createTextMessage(ms);
//					}
//				});
				log.error("==>MailException:", e);
			}
		} catch (Exception e) {
			log.error("==>", e);
		}
	}
}

Spring和ActiveMQ结合，首先需要在配置文件中配置，也就是当配置文件一加载，开始实例化监听器，然后就开始监听生产者的消息了。所以需要配置<bean>.

3、MessageListenerAdapter

由以上可知，这个接口实现了上面的2个接口，所以除了有上面的方法外，还有很多其他的方法。

邮件发送的例子：

我们用邮件发送的例子来介绍一下生产者和消费者的行为。

首先生产者定义发送邮件的内容，和发送给谁，然后消费者运用接听来时时刻刻监听是否发送的人是自己，假如是自己，则受到消息。

首先我们来建立生产者工程

1、新建maven工程，引用spring和ActiveMQ的jar包

<dependencies>

		<dependency>
			<groupId>antlr</groupId>
			<artifactId>antlr</artifactId>
		</dependency>
		<dependency>
			<groupId>aopalliance</groupId>
			<artifactId>aopalliance</artifactId>
		</dependency>
		<dependency>
			<groupId>org.aspectj</groupId>
			<artifactId>aspectjweaver</artifactId>
		</dependency>
		<dependency>
			<groupId>cglib</groupId>
			<artifactId>cglib</artifactId>
		</dependency>
		<dependency>
			<groupId>net.sf.json-lib</groupId>
			<artifactId>json-lib</artifactId>
			<classifier>jdk15</classifier>
			<scope>compile</scope>
		</dependency>
		<dependency>
			<groupId>ognl</groupId>
			<artifactId>ognl</artifactId>
		</dependency>
		<dependency>
			<groupId>oro</groupId>
			<artifactId>oro</artifactId>
		</dependency>
		<dependency>
			<groupId>commons-beanutils</groupId>
			<artifactId>commons-beanutils</artifactId>
		</dependency>
		<dependency>
			<groupId>commons-codec</groupId>
			<artifactId>commons-codec</artifactId>
		</dependency>
		<dependency>
			<groupId>commons-collections</groupId>
			<artifactId>commons-collections</artifactId>
		</dependency>
		<dependency>
			<groupId>commons-digester</groupId>
			<artifactId>commons-digester</artifactId>
		</dependency>
		<dependency>
			<groupId>commons-fileupload</groupId>
			<artifactId>commons-fileupload</artifactId>
		</dependency>
		<dependency>
			<groupId>commons-io</groupId>
			<artifactId>commons-io</artifactId>
		</dependency>
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-lang3</artifactId>
		</dependency>
		<dependency>
			<groupId>commons-logging</groupId>
			<artifactId>commons-logging</artifactId>
		</dependency>
		<dependency>
			<groupId>commons-validator</groupId>
			<artifactId>commons-validator</artifactId>
		</dependency>
		<dependency>
			<groupId>dom4j</groupId>
			<artifactId>dom4j</artifactId>
		</dependency>
		<dependency>
			<groupId>net.sf.ezmorph</groupId>
			<artifactId>ezmorph</artifactId>
		</dependency>
		<dependency>
			<groupId>javassist</groupId>
			<artifactId>javassist</artifactId>
		</dependency>
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-log4j12</artifactId>
		</dependency>
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
		</dependency>

		<!-- Common Dependency End -->

		<!-- Spring Dependency Begin -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aop</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aspects</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-beans</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context-support</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jms</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-orm</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-oxm</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-tx</artifactId>
		</dependency>
		<dependency>
			<groupId>org.apache.activemq</groupId>
			<artifactId>activemq-all</artifactId>
		</dependency>
		<dependency>
			<groupId>org.apache.activemq</groupId>
			<artifactId>activemq-pool</artifactId>
		</dependency>
	</dependencies>

2、新建配置文件，分别是spring的配置文件和mq的配置文件

<?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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans  
           http://www.springframework.org/schema/beans/spring-beans-3.2.xsd  
           http://www.springframework.org/schema/aop   
           http://www.springframework.org/schema/aop/spring-aop-3.2.xsd  
           http://www.springframework.org/schema/tx  
           http://www.springframework.org/schema/tx/spring-tx-3.2.xsd  
           http://www.springframework.org/schema/context  
           http://www.springframework.org/schema/context/spring-context-3.2.xsd"
	default-autowire="byName" default-lazy-init="false">
	
	

	<!-- 采用注释的方式配置bean -->
	<context:annotation-config />

	<!-- 配置要扫描的包 -->
	<context:component-scan base-package="mq.demo" />

	<!-- 读入配置属性文件 -->
	<context:property-placeholder location="classpath:mq.properties" />

	<!-- proxy-target-class默认"false",更改为"ture"使用CGLib动态代理 -->
	<aop:aspectj-autoproxy proxy-target-class="true" />	
	
	<import resource="spring-mq.xml" />
</beans>

mq的配置文件：

<?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:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans  
           http://www.springframework.org/schema/beans/spring-beans-3.2.xsd  
           http://www.springframework.org/schema/aop   
           http://www.springframework.org/schema/aop/spring-aop-3.2.xsd  
           http://www.springframework.org/schema/tx  
           http://www.springframework.org/schema/tx/spring-tx-3.2.xsd  
           http://www.springframework.org/schema/context  
           http://www.springframework.org/schema/context/spring-context-3.2.xsd"
	default-autowire="byName" default-lazy-init="false">
	


	<!-- 真正可以产生Connection的ConnectionFactory，由对应的 JMS服务厂商提供 -->
	<bean id="targetConnectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
		<!-- ActiveMQ服务地址 -->
        <property name="brokerURL" value="${mq.brokerURL}" />
        <property name="userName" value="${mq.userName}"></property>
        <property name="password" value="${mq.password}"></property> 
	</bean>

    <!-- 
    	ActiveMQ为我们提供了一个PooledConnectionFactory，通过往里面注入一个ActiveMQConnectionFactory
    	可以用来将Connection、Session和MessageProducer池化，这样可以大大的减少我们的资源消耗。
    	要依赖于 activemq-pool包
     -->
	<bean id="pooledConnectionFactory" class="org.apache.activemq.pool.PooledConnectionFactory">
		<property name="connectionFactory" ref="targetConnectionFactory" />
		<property name="maxConnections" value="${mq.pool.maxConnections}" />
	</bean>

	<!-- Spring用于管理真正的ConnectionFactory的ConnectionFactory -->
	<bean id="connectionFactory" class="org.springframework.jms.connection.SingleConnectionFactory">
		<!-- 目标ConnectionFactory对应真实的可以产生JMS Connection的ConnectionFactory -->
		<property name="targetConnectionFactory" ref="pooledConnectionFactory" />
	</bean>
	
	<!-- Spring提供的JMS工具类，它可以进行消息发送、接收等 -->
	
	<!-- 队列模板 -->
	<bean id="activeMqJmsTemplate" class="org.springframework.jms.core.JmsTemplate">  
	    <!-- 这个connectionFactory对应的是我们定义的Spring提供的那个ConnectionFactory对象 -->  
	    <property name="connectionFactory" ref="connectionFactory"/>  
	    <property name="defaultDestinationName" value="${queueName}"></property>
	</bean> 

</beans>

mq.properties文件的内容：

## MQ
mq.brokerURL=tcp\://192.168.120.153\:61616
mq.userName=lifen
mq.password=lifen.123
mq.pool.maxConnections=10
#queueName
queueName=fen.email.demo

3、由于是发送邮件，新建一个邮件的封装实体类，类名为MailParam

public class MailParam {

	/** 发件人 **/
	private String from;
	/** 收件人 **/
	private String to;
	/** 主题 **/
	private String subject;
	/** 邮件内容 **/
	private String content;

	public MailParam() {
	}

	public MailParam(String to, String subject, String content) {
		this.to = to;
		this.subject = subject;
		this.content = content;
	}

	public String getFrom() {
		return from;
	}

	public void setFrom(String from) {
		this.from = from;
	}

	public String getTo() {
		return to;
	}

	public void setTo(String to) {
		this.to = to;
	}

	public String getSubject() {
		return subject;
	}

	public void setSubject(String subject) {
		this.subject = subject;
	}

	public String getContent() {
		return content;
	}

	public void setContent(String content) {
		this.content = content;
	}
}

4、接下来就是MQ的生产者代码：

@Service("mqProducer")
public class MQProducer {
	
	@Autowired
	private JmsTemplate activeMqJmsTemplate;

	/**
	 * 发送消息.
	 * @param mail 
	 */
	public void sendMessage(final MailParam mail) {
		activeMqJmsTemplate.send(new MessageCreator() {
			public Message createMessage(Session session) throws JMSException {
				return session.createTextMessage(JSONObject.toJSONString(mail));
			}
		});
		
	}

}

5、新建测试类，我们来测试一下：

public class MQProducerTest {
	private static final Log log = LogFactory.getLog(MQProducerTest.class);

	public static void main(String[] args) {
		try {
			ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("classpath:spring/spring-context.xml");
			context.start();

			MQProducer mqProducer = (MQProducer) context.getBean("mqProducer");
			// 邮件发送
			MailParam mail = new MailParam();
			mail.setTo("lf0908lf@163.com");
			mail.setSubject("ActiveMQ测试");
			mail.setContent("通过ActiveMQ异步发送邮件！一定会成功的");

			mqProducer.sendMessage(mail);

			context.stop();
		} catch (Exception e) {
			log.error("==>MQ context start error:", e);
			System.exit(0);
		} finally {
			log.info("===>System.exit");
			System.exit(0);
		}
	}
}

我们在ActiveMQ的管理页面，就可以看到一个名为fen.email.demo的队列了。

接下来我们建立消费者的工程，

1、同样引用jar包，和生产者的jar包一样。

2、接着就是配置文件

spring-context的配置文件：

<?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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans  
           http://www.springframework.org/schema/beans/spring-beans-3.2.xsd  
           http://www.springframework.org/schema/aop   
           http://www.springframework.org/schema/aop/spring-aop-3.2.xsd  
           http://www.springframework.org/schema/tx  
           http://www.springframework.org/schema/tx/spring-tx-3.2.xsd  
           http://www.springframework.org/schema/context  
           http://www.springframework.org/schema/context/spring-context-3.2.xsd"
	default-autowire="byName" default-lazy-init="false">
	
	

	<!-- 采用注释的方式配置bean -->
	<context:annotation-config />

	<!-- 配置要扫描的包 -->
	<context:component-scan base-package="mq.demo" />

	<!-- 读入配置属性文件 -->
	<context:property-placeholder location="classpath:mq.properties,classpath:mail.properties" />

	<!-- proxy-target-class默认"false",更改为"ture"使用CGLib动态代理 -->
	<aop:aspectj-autoproxy proxy-target-class="true" />	
	
	<import resource="spring-mq.xml" />
	<import resource="spring-mail.xml" />
	
</beans>

spring-mail的配置文件：

<?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:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:cache="http://www.springframework.org/schema/cache"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
	   http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
	   http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
       http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-3.2.xsd">
       
   
	
	<!-- Spring提供的发送电子邮件的高级抽象类 -->
	<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
		<property name="host" value="${mail.host}" />
		<property name="username" value="${mail.username}" />
		<property name="password" value="${mail.password}" />
		<property name="defaultEncoding" value="UTF-8"></property>
		<property name="javaMailProperties">
			<props>
				<prop key="mail.smtp.auth">${mail.smtp.auth}</prop>
				<prop key="mail.smtp.timeout">${mail.smtp.timeout}</prop>
			</props>
		</property>
	</bean>

	<bean id="simpleMailMessage" class="org.springframework.mail.SimpleMailMessage">
		<property name="from">
			<value>${mail.default.from}</value>
		</property>
	</bean>
	
	<!-- 配置线程池 -->
	<bean id="threadPool" class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">
		<!-- 线程池维护线程的最少数量 -->
		<property name="corePoolSize" value="5" />
		<!-- 线程池维护线程所允许的空闲时间 -->
		<property name="keepAliveSeconds" value="30000" />
		<!-- 线程池维护线程的最大数量 -->
		<property name="maxPoolSize" value="50" />
		<!-- 线程池所使用的缓冲队列 -->
		<property name="queueCapacity" value="100" />
	</bean>

</beans>

spring-mq的配置文件：

<?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:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans  
           http://www.springframework.org/schema/beans/spring-beans-3.2.xsd  
           http://www.springframework.org/schema/aop   
           http://www.springframework.org/schema/aop/spring-aop-3.2.xsd  
           http://www.springframework.org/schema/tx  
           http://www.springframework.org/schema/tx/spring-tx-3.2.xsd  
           http://www.springframework.org/schema/context  
           http://www.springframework.org/schema/context/spring-context-3.2.xsd"
	default-autowire="byName" default-lazy-init="false">
 <!--default-lazy-init 
           spring 在启动的时候，会默认加载整个对象实例图，从初始化ACTION配置，到service再到dao配置，乃至到数据
           库的连接。事务等等，当设置为false的时候，会大大减少初始化的时间，减少spring的启动速度。在开发阶段，可以设置为false
           但是到了生产环境中，设置为true
             -->
	<!-- 真正可以产生Connection的ConnectionFactory，由对应的 JMS服务厂商提供 -->
	<bean id="targetConnectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
		<!-- ActiveMQ服务地址 -->
        <property name="brokerURL" value="${mq.brokerURL}" />
        <property name="userName" value="${mq.userName}"></property>
        <property name="password" value="${mq.password}"></property> 
	</bean>

    <!-- 
    	ActiveMQ为我们提供了一个PooledConnectionFactory，通过往里面注入一个ActiveMQConnectionFactory
    	可以用来将Connection、Session和MessageProducer池化，这样可以大大的减少我们的资源消耗。
    	要依赖于 activemq-pool包
     -->
	<bean id="pooledConnectionFactory" class="org.apache.activemq.pool.PooledConnectionFactory">
		<property name="connectionFactory" ref="targetConnectionFactory" />
		<property name="maxConnections" value="${mq.pool.maxConnections}" />
	</bean>

	<!-- Spring用于管理真正的ConnectionFactory的ConnectionFactory -->
	<bean id="connectionFactory" class="org.springframework.jms.connection.SingleConnectionFactory">
		<!-- 目标ConnectionFactory对应真实的可以产生JMS Connection的ConnectionFactory -->
		<property name="targetConnectionFactory" ref="pooledConnectionFactory" />
	</bean>
	
	<!-- Spring提供的JMS工具类，它可以进行消息发送、接收等 -->
	
	<!-- 队列模板 -->
	<bean id="activeMqJmsTemplate" class="org.springframework.jms.core.JmsTemplate">  
	    <!-- 这个connectionFactory对应的是我们定义的Spring提供的那个ConnectionFactory对象 -->  
	    <property name="connectionFactory" ref="connectionFactory"/>  
	    <property name="defaultDestinationName" value="${queueName}"></property>
	</bean> 
	
	<!--这个是sessionAwareQueue目的地 -->
	<bean id="sessionAwareQueue" class="org.apache.activemq.command.ActiveMQQueue">
		<constructor-arg>
			<value>${queueName}</value>
		</constructor-arg>
	</bean>

	<!-- 可以获取session的MessageListener -->
	<bean id="consumerSessionAwareMessageListener" class="mq.demo.mqtest.listener.ConsumerSessionAwareMessageListener"></bean>

	<bean id="sessionAwareListenerContainer" class="org.springframework.jms.listener.DefaultMessageListenerContainer">
		<property name="connectionFactory" ref="connectionFactory" />
		<property name="destination" ref="sessionAwareQueue" />
		<property name="messageListener" ref="consumerSessionAwareMessageListener" />
	</bean>

</beans>

下面看一下文本文件：

mail.properties

#SMTP服务配置
#mail.host=smtp.qq.com
mail.host=smtp.163.com
mail.username=&&&&&   #邮箱的账号
#mail.port=25
mail.password=&&&&&  #邮箱号的密码
mail.smtp.auth=true
mail.smtp.timeout=30000
mail.default.from=&&&&  #邮箱的账号

mq.properties

## MQ
mq.brokerURL=tcp\://192.168.120.153\:61616
mq.userName=lifen
mq.password=lifen.123
mq.pool.maxConnections=10
#queueName
queueName=fen.email.demo

3、同时也有一个封装邮件参数的实体，和生产者一样，不再叙述。

4、队列监听器，时时刻刻监听者生产端：

@Component
public class ConsumerSessionAwareMessageListener implements SessionAwareMessageListener<Message> {

	private static final Log log = LogFactory.getLog(ConsumerSessionAwareMessageListener.class);

	@Autowired
	private JmsTemplate activeMqJmsTemplate;
	@Autowired
	private Destination sessionAwareQueue;
	@Autowired
	private MailBiz bailBiz;

	public synchronized void onMessage(Message message, Session session) {
		try {
			ActiveMQTextMessage msg = (ActiveMQTextMessage) message;
			final String ms = msg.getText();
			log.info("==>receive message:" + ms);
			MailParam mailParam = JSONObject.parseObject(ms, MailParam.class);// 转换成相应的对象
			if (mailParam == null) {
				return;
			}

			try {
				bailBiz.mailSend(mailParam);
			} catch (Exception e) {
				// 发送异常，重新放回队列
//				activeMqJmsTemplate.send(sessionAwareQueue, new MessageCreator() {
//					public Message createMessage(Session session) throws JMSException {
//						return session.createTextMessage(ms);
//					}
//				});
				log.error("==>MailException:", e);
			}
		} catch (Exception e) {
			log.error("==>", e);
		}
	}
}

5、邮件的业务逻辑类：

@Component("mailBiz")
public class MailBiz {

	@Autowired
	private JavaMailSender mailSender;// spring配置中定义
	@Autowired
	private SimpleMailMessage simpleMailMessage;// spring配置中定义
	@Autowired
	private ThreadPoolTaskExecutor threadPool;

	/**
	 * 发送模板邮件
	 * 
	 * @param mailParamTemp需要设置四个参数
	 *            templateName,toMail,subject,mapModel
	 * @throws Exception
	 * 
	 */
	public void mailSend(final MailParam mailParam) {
		threadPool.execute(new Runnable() {
			public void run() {
				try {
					simpleMailMessage.setFrom(simpleMailMessage.getFrom()); // 发送人,从配置文件中取得
					simpleMailMessage.setTo(mailParam.getTo()); // 接收人
					simpleMailMessage.setSubject(mailParam.getSubject());
					simpleMailMessage.setText(mailParam.getContent());
					mailSender.send(simpleMailMessage);
				} catch (MailException e) {
					throw e;
				}
			}
		});
	}
}

6、我们测试一下消费者，由于是加载配置文件的时候自动启动监听机制，开始监听，所以我们仅仅需要加载配置文件即可：

public class MQConsumerTest {
	private static final Log log = LogFactory.getLog(MQConsumer.class);

	public static void main(String[] args) {
		try {
			ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("classpath:spring/spring-context.xml");
			context.start();
		} catch (Exception e) {
			log.error("==>MQ context start error:", e);
			System.exit(0);
		}
	}
}

如图：

提醒：

在发送邮件的时候，需要开启以下的服务，要不然会报认证失败的错误，同时也要保证上面的用户名和密码都是正确的。