（六）消息隊列之ActiveMQ詳細入門教程

本文爲學習筆記，主要用於記錄本人學習過程。內容爲轉載！！！！

ActiveMQ介紹

     MQ是消息中間件，是一種在分佈式系統中應用程序藉以傳遞消息的媒介，常用的有ActiveMQ，RabbitMQ，kafka。ActiveMQ是Apache下的開源項目，完全支持JMS1.1和J2EE1.4規範的JMS Provider實現。 
特點： 
1、支持多種語言編寫客戶端 
2、對spring的支持，很容易和spring整合 
3、支持多種傳輸協議：TCP,SSL,NIO,UDP等 
4、支持AJAX 
消息形式： 
1、點對點（queue） 
2、一對多（topic） 

ActiveMQ安裝

我這裏提供一個安裝好的虛擬機：http://download.csdn.net/download/liuyuanq123/10217892 
服務器運行後，我們可以直接訪問到activeMQ的界面： 

然後點擊queues可以看到現在沒有一條消息： 

ActiveMQ測試

      編寫一個測試類對ActiveMQ進行測試，首先得向pom文件中添加ActiveMQ相關的jar包：

<span style="color:#000000"><code>     <span style="color:#006666"><<span style="color:#4f4f4f">dependency</span>></span>  
         <span style="color:#006666"><<span style="color:#4f4f4f">groupId</span>></span>org.apache.activemq<span style="color:#006666"></<span style="color:#4f4f4f">groupId</span>></span>  
         <span style="color:#006666"><<span style="color:#4f4f4f">artifactId</span>></span>activemq-all<span style="color:#006666"></<span style="color:#4f4f4f">artifactId</span>></span>  
    <span style="color:#006666"></<span style="color:#4f4f4f">dependency</span>></span>  </code></span>

• queue的發送代碼如下:

<span style="color:#000000"><code>    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">testMQProducerQueue</span>() <span style="color:#000088">throws</span> Exception{
        <span style="color:#880000">//1、創建工廠連接對象，需要制定ip和端口號</span>
        ConnectionFactory connectionFactory = <span style="color:#000088">new</span> ActiveMQConnectionFactory(<span style="color:#009900">"tcp://192.168.156.44:61616"</span>);
        <span style="color:#880000">//2、使用連接工廠創建一個連接對象</span>
        Connection connection = connectionFactory.createConnection();
        <span style="color:#880000">//3、開啓連接</span>
        connection.start();
        <span style="color:#880000">//4、使用連接對象創建會話（session）對象</span>
        Session session = connection.createSession(<span style="color:#000088">false</span>, Session.AUTO_ACKNOWLEDGE);
        <span style="color:#880000">//5、使用會話對象創建目標對象，包含queue和topic（一對一和一對多）</span>
        Queue queue = session.createQueue(<span style="color:#009900">"test-queue"</span>);
        <span style="color:#880000">//6、使用會話對象創建生產者對象</span>
        MessageProducer producer = session.createProducer(queue);
        <span style="color:#880000">//7、使用會話對象創建一個消息對象</span>
        TextMessage textMessage = session.createTextMessage(<span style="color:#009900">"hello!test-queue"</span>);
        <span style="color:#880000">//8、發送消息</span>
        producer.send(textMessage);
        <span style="color:#880000">//9、關閉資源</span>
        producer.close();
        session.close();
        connection.close();
    }</code></span>

接收代碼：

<span style="color:#000000"><code>    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">TestMQConsumerQueue</span>() <span style="color:#000088">throws</span> Exception{
        <span style="color:#880000">//1、創建工廠連接對象，需要制定ip和端口號</span>
        ConnectionFactory connectionFactory = <span style="color:#000088">new</span> ActiveMQConnectionFactory(<span style="color:#009900">"tcp://192.168.156.44:61616"</span>);
        <span style="color:#880000">//2、使用連接工廠創建一個連接對象</span>
        Connection connection = connectionFactory.createConnection();
        <span style="color:#880000">//3、開啓連接</span>
        connection.start();
        <span style="color:#880000">//4、使用連接對象創建會話（session）對象</span>
        Session session = connection.createSession(<span style="color:#000088">false</span>, Session.AUTO_ACKNOWLEDGE);
        <span style="color:#880000">//5、使用會話對象創建目標對象，包含queue和topic（一對一和一對多）</span>
        Queue queue = session.createQueue(<span style="color:#009900">"test-queue"</span>);
        <span style="color:#880000">//6、使用會話對象創建生產者對象</span>
        MessageConsumer consumer = session.createConsumer(queue);
        <span style="color:#880000">//7、向consumer對象中設置一個messageListener對象，用來接收消息</span>
        consumer.setMessageListener(<span style="color:#000088">new</span> MessageListener() {

            <span style="color:#9b859d">@Override</span>
            <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">onMessage</span>(Message message) {
                <span style="color:#880000">// TODO Auto-generated method stub</span>
                <span style="color:#000088">if</span>(message <span style="color:#000088">instanceof</span> TextMessage){
                    TextMessage textMessage = (TextMessage)message;
                    <span style="color:#000088">try</span> {
                        System.out.println(textMessage.getText());
                    } <span style="color:#000088">catch</span> (JMSException e) {
                        <span style="color:#880000">// TODO Auto-generated catch block</span>
                        e.printStackTrace();
                    }
                }
            }
        });
        <span style="color:#880000">//8、程序等待接收用戶消息</span>
        System.in.read();
        <span style="color:#880000">//9、關閉資源</span>
        consumer.close();
        session.close();
        connection.close();
    }</code></span>

• 然後當我們運行queue發送的時候可以看到隊列裏已經有一條消息了，但沒有發送出去： 

然後在運行queue 的接收端，可以看到消息已經發出了： 


接着對topic進行測試，發送代碼如下：

<span style="color:#000000"><code>    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">TestTopicProducer</span>() <span style="color:#000088">throws</span> Exception{
        <span style="color:#880000">//1、創建工廠連接對象，需要制定ip和端口號</span>
        ConnectionFactory connectionFactory = <span style="color:#000088">new</span> ActiveMQConnectionFactory(<span style="color:#009900">"tcp://192.168.156.44:61616"</span>);
        <span style="color:#880000">//2、使用連接工廠創建一個連接對象</span>
        Connection connection = connectionFactory.createConnection();
        <span style="color:#880000">//3、開啓連接</span>
        connection.start();
        <span style="color:#880000">//4、使用連接對象創建會話（session）對象</span>
        Session session = connection.createSession(<span style="color:#000088">false</span>, Session.AUTO_ACKNOWLEDGE);
        <span style="color:#880000">//5、使用會話對象創建目標對象，包含queue和topic（一對一和一對多）</span>
        Topic topic = session.createTopic(<span style="color:#009900">"test-topic"</span>);
        <span style="color:#880000">//6、使用會話對象創建生產者對象</span>
        MessageProducer producer = session.createProducer(topic);
        <span style="color:#880000">//7、使用會話對象創建一個消息對象</span>
        TextMessage textMessage = session.createTextMessage(<span style="color:#009900">"hello!test-topic"</span>);
        <span style="color:#880000">//8、發送消息</span>
        producer.send(textMessage);
        <span style="color:#880000">//9、關閉資源</span>
        producer.close();
        session.close();
        connection.close();
    }</code></span>

• 接收代碼：

<span style="color:#000000"><code>    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">TestTopicConsumer</span>() <span style="color:#000088">throws</span> Exception{
        <span style="color:#880000">//1、創建工廠連接對象，需要制定ip和端口號</span>
        ConnectionFactory connectionFactory = <span style="color:#000088">new</span> ActiveMQConnectionFactory(<span style="color:#009900">"tcp://192.168.156.44:61616"</span>);
        <span style="color:#880000">//2、使用連接工廠創建一個連接對象</span>
        Connection connection = connectionFactory.createConnection();
        <span style="color:#880000">//3、開啓連接</span>
        connection.start();
        <span style="color:#880000">//4、使用連接對象創建會話（session）對象</span>
        Session session = connection.createSession(<span style="color:#000088">false</span>, Session.AUTO_ACKNOWLEDGE);
        <span style="color:#880000">//5、使用會話對象創建目標對象，包含queue和topic（一對一和一對多）</span>
        Topic topic = session.createTopic(<span style="color:#009900">"test-topic"</span>);
        <span style="color:#880000">//6、使用會話對象創建生產者對象</span>
        MessageConsumer consumer = session.createConsumer(topic);
        <span style="color:#880000">//7、向consumer對象中設置一個messageListener對象，用來接收消息</span>
        consumer.setMessageListener(<span style="color:#000088">new</span> MessageListener() {

            <span style="color:#9b859d">@Override</span>
            <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">onMessage</span>(Message message) {
                <span style="color:#880000">// TODO Auto-generated method stub</span>
                <span style="color:#000088">if</span>(message <span style="color:#000088">instanceof</span> TextMessage){
                    TextMessage textMessage = (TextMessage)message;
                    <span style="color:#000088">try</span> {
                        System.out.println(textMessage.getText());
                    } <span style="color:#000088">catch</span> (JMSException e) {
                        <span style="color:#880000">// TODO Auto-generated catch block</span>
                        e.printStackTrace();
                    }
                }
            }
        });
        <span style="color:#880000">//8、程序等待接收用戶消息</span>
        System.in.read();
        <span style="color:#880000">//9、關閉資源</span>
        consumer.close();
        session.close();
        connection.close();
    }</code></span>

• 然後運行topic發送： 

可以看到消息已經發送出去。再運行topic接收： 

可以看到有了一個消費者，但是沒有接收的消息，這是因爲正常情況下我們的topic消息不會再服務器持久化，所以要先打開消費者，再打開生產者，這個時候我們再運行生產者發送一條消息看到消息已經接收到了： 

ActiveMQ整合spring及項目中運用

      activeMQ與spring看一整合到一起使用，除了添加ActiveMQ相關的jar包外，還需要添加spring的jar包：

<span style="color:#000000"><code>    <span style="color:#006666"><<span style="color:#4f4f4f">dependency</span>></span>  
        <span style="color:#006666"><<span style="color:#4f4f4f">groupId</span>></span>org.springframework<span style="color:#006666"></<span style="color:#4f4f4f">groupId</span>></span>  
        <span style="color:#006666"><<span style="color:#4f4f4f">artifactId</span>></span>spring-context<span style="color:#006666"></<span style="color:#4f4f4f">artifactId</span>></span>  
    <span style="color:#006666"></<span style="color:#4f4f4f">dependency</span>></span>  </code></span>

• 然後編寫applicationContext-activemq.xml文件， 

代碼如下：

<span style="color:#000000"><code><span style="color:#006666"><?xml version="1.0" encoding="UTF-8"?></span>  
<span style="color:#006666"><<span style="color:#4f4f4f">beans</span> <span style="color:#4f4f4f">xmlns</span>=<span style="color:#009900">"http://www.springframework.org/schema/beans"</span>  
    <span style="color:#4f4f4f">xmlns:context</span>=<span style="color:#009900">"http://www.springframework.org/schema/context"</span> <span style="color:#4f4f4f">xmlns:p</span>=<span style="color:#009900">"http://www.springframework.org/schema/p"</span>  
    <span style="color:#4f4f4f">xmlns:aop</span>=<span style="color:#009900">"http://www.springframework.org/schema/aop"</span> <span style="color:#4f4f4f">xmlns:tx</span>=<span style="color:#009900">"http://www.springframework.org/schema/tx"</span>  
    <span style="color:#4f4f4f">xmlns:dubbo</span>=<span style="color:#009900">"http://code.alibabatech.com/schema/dubbo"</span>  
    <span style="color:#4f4f4f">xmlns:xsi</span>=<span style="color:#009900">"http://www.w3.org/2001/XMLSchema-instance"</span>  
    <span style="color:#4f4f4f">xsi:schemaLocation</span>=<span style="color:#009900">"http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd  
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd  
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd  
    http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd  
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd"</span>></span>  

    <span style="color:#880000"><!-- 配置能夠產生connection的connectionfactory，由JMS對應的服務廠商提供 --></span>
    <span style="color:#006666"><<span style="color:#4f4f4f">bean</span> <span style="color:#4f4f4f">id</span>=<span style="color:#009900">"tagertConnectionFactory"</span> <span style="color:#4f4f4f">class</span>=<span style="color:#009900">"org.apache.activemq.ActiveMQConnectionFactory"</span>></span>
        <span style="color:#006666"><<span style="color:#4f4f4f">constructor-arg</span> <span style="color:#4f4f4f">name</span>=<span style="color:#009900">"brokerURL"</span> <span style="color:#4f4f4f">value</span>=<span style="color:#009900">"tcp://192.168.156.44:61616"</span>/></span>
    <span style="color:#006666"></<span style="color:#4f4f4f">bean</span>></span>
    <span style="color:#880000"><!-- 配置spring管理真正connectionfactory的connectionfactory，相當於spring對connectionfactory的一層封裝 --></span>
    <span style="color:#006666"><<span style="color:#4f4f4f">bean</span> <span style="color:#4f4f4f">id</span>=<span style="color:#009900">"connectionFactory"</span> <span style="color:#4f4f4f">class</span>=<span style="color:#009900">"org.springframework.jms.connection.SingleConnectionFactory"</span>></span>
        <span style="color:#006666"><<span style="color:#4f4f4f">property</span> <span style="color:#4f4f4f">name</span>=<span style="color:#009900">"targetConnectionFactory"</span> <span style="color:#4f4f4f">ref</span>=<span style="color:#009900">"tagertConnectionFactory"</span>/></span>
    <span style="color:#006666"></<span style="color:#4f4f4f">bean</span>></span>
    <span style="color:#880000"><!-- 配置生產者 --></span>
    <span style="color:#880000"><!-- Spring使用JMS工具類，可以用來發送和接收消息 --></span>
    <span style="color:#006666"><<span style="color:#4f4f4f">bean</span> <span style="color:#4f4f4f">id</span>=<span style="color:#009900">"jmsTemplate"</span> <span style="color:#4f4f4f">class</span>=<span style="color:#009900">"org.springframework.jms.core.JmsTemplate"</span>></span>
        <span style="color:#880000"><!-- 這裏是配置的spring用來管理connectionfactory的connectionfactory --></span>
        <span style="color:#006666"><<span style="color:#4f4f4f">property</span> <span style="color:#4f4f4f">name</span>=<span style="color:#009900">"connectionFactory"</span> <span style="color:#4f4f4f">ref</span>=<span style="color:#009900">"connectionFactory"</span>/></span>
    <span style="color:#006666"></<span style="color:#4f4f4f">bean</span>></span>
    <span style="color:#880000"><!-- 配置destination --></span>
    <span style="color:#880000"><!-- 隊列目的地 --></span>
    <span style="color:#006666"><<span style="color:#4f4f4f">bean</span> <span style="color:#4f4f4f">id</span>=<span style="color:#009900">"queueDestination"</span> <span style="color:#4f4f4f">class</span>=<span style="color:#009900">"org.apache.activemq.command.ActiveMQQueue"</span>></span>
        <span style="color:#006666"><<span style="color:#4f4f4f">constructor-arg</span> <span style="color:#4f4f4f">value</span>=<span style="color:#009900">"spring-queue"</span>/></span>
    <span style="color:#006666"></<span style="color:#4f4f4f">bean</span>></span>
    <span style="color:#880000"><!-- 話題目的地 --></span>
    <span style="color:#006666"><<span style="color:#4f4f4f">bean</span> <span style="color:#4f4f4f">id</span>=<span style="color:#009900">"itemAddTopic"</span> <span style="color:#4f4f4f">class</span>=<span style="color:#009900">"org.apache.activemq.command.ActiveMQTopic"</span>></span>
        <span style="color:#006666"><<span style="color:#4f4f4f">constructor-arg</span> <span style="color:#4f4f4f">value</span>=<span style="color:#009900">"item-add-topic"</span>/></span>
    <span style="color:#006666"></<span style="color:#4f4f4f">bean</span>></span>
<span style="color:#006666"></<span style="color:#4f4f4f">beans</span>></span>  </code></span>

• 然後在我們淘淘商城中，商品添加到數據庫的時候，對應也要添加數據到我們的solr索引中，所以生產者應該在插入數據後創建： 

當然，在xml文件中配置好的jmstemplate和destination也要注入進來：

<span style="color:#000000"><code>    <span style="color:#9b859d">@Autowired</span>
    <span style="color:#000088">private</span> JmsTemplate jmsTemplate;
    <span style="color:#9b859d">@Resource</span>(name=<span style="color:#009900">"itemAddTopic"</span>)
    <span style="color:#000088">private</span> Destination destination;</code></span>

然後消費者應該寫在我們的搜索工程中，首先添加spring和activeMQ的jar包，然後配置xml文件，再編寫一個監聽器，當接收到消息時，就講數據存入索引庫，xml文件代碼如下：

<span style="color:#000000"><code><span style="color:#006666"><?xml version="1.0" encoding="UTF-8"?></span>  
<span style="color:#006666"><<span style="color:#4f4f4f">beans</span> <span style="color:#4f4f4f">xmlns</span>=<span style="color:#009900">"http://www.springframework.org/schema/beans"</span>  
    <span style="color:#4f4f4f">xmlns:context</span>=<span style="color:#009900">"http://www.springframework.org/schema/context"</span> <span style="color:#4f4f4f">xmlns:p</span>=<span style="color:#009900">"http://www.springframework.org/schema/p"</span>  
    <span style="color:#4f4f4f">xmlns:aop</span>=<span style="color:#009900">"http://www.springframework.org/schema/aop"</span> <span style="color:#4f4f4f">xmlns:tx</span>=<span style="color:#009900">"http://www.springframework.org/schema/tx"</span>  
    <span style="color:#4f4f4f">xmlns:dubbo</span>=<span style="color:#009900">"http://code.alibabatech.com/schema/dubbo"</span>  
    <span style="color:#4f4f4f">xmlns:xsi</span>=<span style="color:#009900">"http://www.w3.org/2001/XMLSchema-instance"</span>  
    <span style="color:#4f4f4f">xsi:schemaLocation</span>=<span style="color:#009900">"http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd  
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd  
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd  
    http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd  
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd"</span>></span>  

    <span style="color:#880000"><!-- 配置能夠產生connection的connectionfactory，由JMS對應的服務廠商提供 --></span>
    <span style="color:#006666"><<span style="color:#4f4f4f">bean</span> <span style="color:#4f4f4f">id</span>=<span style="color:#009900">"tagertConnectionFactory"</span> <span style="color:#4f4f4f">class</span>=<span style="color:#009900">"org.apache.activemq.ActiveMQConnectionFactory"</span>></span>
        <span style="color:#006666"><<span style="color:#4f4f4f">constructor-arg</span> <span style="color:#4f4f4f">name</span>=<span style="color:#009900">"brokerURL"</span> <span style="color:#4f4f4f">value</span>=<span style="color:#009900">"tcp://192.168.156.44:61616"</span>/></span>
    <span style="color:#006666"></<span style="color:#4f4f4f">bean</span>></span>
    <span style="color:#880000"><!-- 配置spring管理真正connectionfactory的connectionfactory，相當於spring對connectionfactory的一層封裝 --></span>
    <span style="color:#006666"><<span style="color:#4f4f4f">bean</span> <span style="color:#4f4f4f">id</span>=<span style="color:#009900">"connectionFactory"</span> <span style="color:#4f4f4f">class</span>=<span style="color:#009900">"org.springframework.jms.connection.SingleConnectionFactory"</span>></span>
        <span style="color:#006666"><<span style="color:#4f4f4f">property</span> <span style="color:#4f4f4f">name</span>=<span style="color:#009900">"targetConnectionFactory"</span> <span style="color:#4f4f4f">ref</span>=<span style="color:#009900">"tagertConnectionFactory"</span>/></span>
    <span style="color:#006666"></<span style="color:#4f4f4f">bean</span>></span>
    <span style="color:#880000"><!-- 配置destination --></span>
    <span style="color:#880000"><!-- 隊列目的地 --></span>
    <span style="color:#006666"><<span style="color:#4f4f4f">bean</span> <span style="color:#4f4f4f">id</span>=<span style="color:#009900">"queueDestination"</span> <span style="color:#4f4f4f">class</span>=<span style="color:#009900">"org.apache.activemq.command.ActiveMQQueue"</span>></span>
        <span style="color:#006666"><<span style="color:#4f4f4f">constructor-arg</span> <span style="color:#4f4f4f">value</span>=<span style="color:#009900">"spring-queue"</span>/></span>
    <span style="color:#006666"></<span style="color:#4f4f4f">bean</span>></span>
    <span style="color:#880000"><!-- 話題目的地 --></span>
    <span style="color:#006666"><<span style="color:#4f4f4f">bean</span> <span style="color:#4f4f4f">id</span>=<span style="color:#009900">"itemAddTopic"</span> <span style="color:#4f4f4f">class</span>=<span style="color:#009900">"org.apache.activemq.command.ActiveMQTopic"</span>></span>
        <span style="color:#006666"><<span style="color:#4f4f4f">constructor-arg</span> <span style="color:#4f4f4f">value</span>=<span style="color:#009900">"item-add-topic"</span>/></span>
    <span style="color:#006666"></<span style="color:#4f4f4f">bean</span>></span>
    <span style="color:#880000"><!-- 配置監聽器 --></span>
    <span style="color:#006666"><<span style="color:#4f4f4f">bean</span> <span style="color:#4f4f4f">id</span>=<span style="color:#009900">"myListener"</span> <span style="color:#4f4f4f">class</span>=<span style="color:#009900">"com.taotao.search.listener.MyListener"</span>/></span>
    <span style="color:#006666"><<span style="color:#4f4f4f">bean</span> <span style="color:#4f4f4f">id</span>=<span style="color:#009900">"itemAddListener"</span> <span style="color:#4f4f4f">class</span>=<span style="color:#009900">"com.taotao.search.listener.ItemAddListener"</span>/></span>
    <span style="color:#880000"><!-- 系統監聽器 --></span>
<span style="color:#880000"><!--    <bean class="org.springframework.jms.listener.DefaultMessageListenerContainer">
        <property name="connectionFactory" ref="connectionFactory"/>
        <property name="destination" ref="queueDestination"/>
        <property name="messageListener" ref="myListener"/>
    </bean> --></span>
    <span style="color:#006666"><<span style="color:#4f4f4f">bean</span> <span style="color:#4f4f4f">class</span>=<span style="color:#009900">"org.springframework.jms.listener.DefaultMessageListenerContainer"</span>></span>
        <span style="color:#006666"><<span style="color:#4f4f4f">property</span> <span style="color:#4f4f4f">name</span>=<span style="color:#009900">"connectionFactory"</span> <span style="color:#4f4f4f">ref</span>=<span style="color:#009900">"connectionFactory"</span>/></span>
        <span style="color:#006666"><<span style="color:#4f4f4f">property</span> <span style="color:#4f4f4f">name</span>=<span style="color:#009900">"destination"</span> <span style="color:#4f4f4f">ref</span>=<span style="color:#009900">"itemAddTopic"</span>/></span>
        <span style="color:#006666"><<span style="color:#4f4f4f">property</span> <span style="color:#4f4f4f">name</span>=<span style="color:#009900">"messageListener"</span> <span style="color:#4f4f4f">ref</span>=<span style="color:#009900">"itemAddListener"</span>/></span>
    <span style="color:#006666"></<span style="color:#4f4f4f">bean</span>></span>
<span style="color:#006666"></<span style="color:#4f4f4f">beans</span>></span>  </code></span>

• 接收消息代碼： 

最後同時打開測試即可。

 

 

轉載自：https://blog.csdn.net/liuyuanq123/article/details/79109218