java 消息机制 ActiveMQ入门实例

发送消息

package SSM.test;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
/**
 * 发送消息
 * @author zhouhe
 * @date 2020/8/15 14:13
 */
public class Sender {
    private static final int SEND_NUMBER = 5;

    public static void main(String[] args) {
        // ConnectionFactory :连接工厂,JMS 用它创建连接
        ConnectionFactory connectionFactory; // Connection :JMS 客户端到JMS
        // Provider 的连接
        Connection connection = null; // Session: 一个发送或接收消息的线程
        Session session; // Destination :消息的目的地;消息发送给谁.
        Destination destination; // MessageProducer:消息发送者
        MessageProducer producer; // TextMessage message;
        // 构造ConnectionFactory实例对象,此处采用ActiveMq的实现jar
        connectionFactory = new ActiveMQConnectionFactory(
                ActiveMQConnection.DEFAULT_USER,
                ActiveMQConnection.DEFAULT_PASSWORD, "tcp://192.168.1.247:61616");
        try { // 构造从工厂得到连接对象
            connection = connectionFactory.createConnection();
            // 启动
            connection.start();
            // 获取操作连接
            session = connection.createSession(Boolean.TRUE,
                    Session.AUTO_ACKNOWLEDGE);
            // 获取session注意参数值xingbo.xu-queue是一个服务器的queue,须在在ActiveMq的console配置
            destination = session.createQueue("FirstQueue");
            // 得到消息生成者【发送者】
            producer = session.createProducer(destination);
            // 设置不持久化,此处学习,实际根据项目决定
            producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
            // 构造消息,此处写死,项目就是参数,或者方法获取
            sendMessage(session, producer);
            session.commit();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != connection)
                    connection.close();
            } catch (Throwable ignore) {
            }
        }
    }

    public static void sendMessage(Session session, MessageProducer producer)
            throws Exception {
        for (int i = 1; i <= SEND_NUMBER; i++) {
            TextMessage message = session.createTextMessage("ActiveMq 发送的消息"
                    + i);
            // 发送消息到目的地方

            System.out.println("发送消息:" + "ActiveMq 发送的消息" + i);
            producer.send(message);
        }
    }
}

 

 

 

 消费消息:

package SSM.test;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.MessageConsumer;
import javax.jms.Session;
import javax.jms.TextMessage;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
/**
 * 消费消息
 * @author zhouhe
 * @date 2020/8/15 14:16
 */
public class Receiver {
    public static void main(String[] args) {
        // ConnectionFactory :连接工厂,JMS 用它创建连接
        ConnectionFactory connectionFactory;
        // Connection :JMS 客户端到JMS Provider 的连接
        Connection connection = null;
        // Session: 一个发送或接收消息的线程
        Session session;
        // Destination :消息的目的地;消息发送给谁.
        Destination destination;
        // 消费者,消息接收者
        MessageConsumer consumer;
        connectionFactory = new ActiveMQConnectionFactory(
                ActiveMQConnection.DEFAULT_USER,
                ActiveMQConnection.DEFAULT_PASSWORD, "tcp://192.168.1.247:61616");
        try {
            // 构造从工厂得到连接对象
            connection = connectionFactory.createConnection();
            // 启动
            connection.start();
            // 获取操作连接
            session = connection.createSession(Boolean.FALSE,
                    Session.AUTO_ACKNOWLEDGE);
            // 获取session注意参数值xingbo.xu-queue是一个服务器的queue,须在在ActiveMq的console配置
            destination = session.createQueue("FirstQueue");
            consumer = session.createConsumer(destination);
            while (true) {
                // 设置接收者接收消息的时间,为了便于测试,这里谁定为100s
                TextMessage message = (TextMessage) consumer.receive(100000);
                if (null != message) {
                    System.out.println("收到消息" + message.getText());
                } else {
                    break;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != connection)
                    connection.close();
            } catch (Throwable ignore) {
            }
        }
    }
}

 

 

 最常用的是发送json数据,这里发送一个实体,转为json发送

 

posted @ 2020-08-15 14:21  农名工进城  阅读(167)  评论(0编辑  收藏  举报