初步使用ActiveMQ
参考：http://t.csdnimg.cn/DxjMm
ActiveMQ的安装
官方的下载地址：http://activemq.apache.org/components/classic/download
（1）运行：解压后，进入bin目录，执行对应版本的 activemq.bat
管理页面：ActiveMQ的默认端口是8161，通过http://localhost:8161/admin/ 可以进 入管理页面
消息生产者程序
依赖
org.apache.activemq
activemq-core
5.7.0
生产者
package com.example.activiti.mq;
import org.apache.activemq.ActiveMQConnectionFactory;
import javax.jms.*;
public class ProducerDemo {
public static void main(String[] args) {
//创建mq连接工厂
//管理路径8161 生产路径61616
ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(
"tcp://localhost:61616"
);
Connection conn = null;
try {
//打开mq连接
conn = connectionFactory.createConnection();
conn.start();
//创建mq会话
Session session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
//创建消息队列
Destination destination = session.createQueue("text-queue-1");
//基于队列创建消息发布者
MessageProducer msgProducer = session.createProducer(destination);
msgProducer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
//向消息队列发送信息
for (int i = 1; i <= 5; i++) {
TextMessage msg = session.createTextMessage();
msg.setText("消息，"+ i);
msgProducer.send(msg);
System.out.println("生产者： "+ msg.getText());
}
} catch (JMSException e) {
throw new RuntimeException(e);
}finally {
if (conn != null){
try {
conn.close();
}catch (JMSException e){
e.printStackTrace();
}
}
}
}
}
消费者
package com.example.activiti.mq;
import org.apache.activemq.ActiveMQConnectionFactory;
import javax.jms.*;
public class ConsumerDemo {
public static void main(String[] args){
ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616");
Connection conn = null;
try {
conn = connectionFactory.createConnection();
conn.start();
Session session = conn.createSession(false,Session.AUTO_ACKNOWLEDGE);
Destination destination = session.createQueue("text-queue-1");
MessageConsumer msgConsumer = session.createConsumer(destination);
while (true){
TextMessage msg = (TextMessage) msgConsumer.receive();
if (msg == null)
break;
System.out.println("消费者"+msg.getText());
}
} catch (JMSException e) {
throw new RuntimeException(e);
}finally {
if (conn != null){
try {
conn.close();
}catch (JMSException e){
e.printStackTrace();
}
}
}
}
}
使用 Spring Boot 简化JMS开发 发送字符串消息
依赖
org.springframework.boot
spring-boot-starter-activemq
yml
spring:
activemq:
broker-url: tcp://127.0.0.1:61616
user: root
password: 1234
packages:
trusted:
- com.example.activemq.pojo
启动类
import jakarta.jms.Queue;
import org.apache.activemq.command.ActiveMQQueue;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
@SpringBootApplication
public class BootJmsDemoApplication {
//在Spring配置类中创建Destination（消息目的地）——Queue（队列）
@Bean(name = "msgQueue")
public Queue msgQueue(){
return new ActiveMQQueue("boot-queue-msg");
}
}生产者
package com.example.activemq.controller;
import jakarta.jms.Queue;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.jms.core.JmsMessagingTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class MsgProducerController {
@Autowired
@Qualifier("msgQueue")
private Queue msgQueue;
//spring提供了JmsMessagingTemplate来简化JMS的调用，直接可以向指定队列发送消 息。
@Autowired
private JmsMessagingTemplate jmsTemplate;
@GetMapping("/send-msg")
public void sendMsg(){
jmsTemplate.convertAndSend(msgQueue,"测试发送消息");
}
}
消费者
package com.example.activemq.controller;
import jakarta.jms.Queue;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.jms.annotation.JmsListener;
import org.springframework.jms.core.JmsMessagingTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class MsgConsumerController {
//spring 提供了“@JmsListener”注解，用于指定接收特定队列消息的消费者方法
@JmsListener(destination = "boot-queue-msg")
public void receive(String msg){
System.out.println("消费者，接收到："+msg);
}
}
发送对象消息
使用JmsMessagingTemplate还可从生产者向消费者以发送对象，对象实际上会被序列化 到消息队列中。
启动类
@Bean(name = "userQueue")
public Queue userQueue(){
return new ActiveMQQueue("boot-queue-user");
}生产者
package com.example.activemq.controller;
import com.example.activemq.pojo.User;
import jakarta.jms.Queue;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.jms.core.JmsMessagingTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class UserProducerController {
@Autowired
@Qualifier("userQueue")
private Queue userQueue;
@Autowired
private JmsMessagingTemplate jmsTemplate;
@GetMapping("/send-user")
public void sendUser(){
User user = new User(1,"zhangsan","张三");
jmsTemplate.convertAndSend(userQueue,user);
}
}
消费者
package com.example.activemq.controller;
import com.example.activemq.pojo.User;
import org.springframework.jms.annotation.JmsListener;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class UserConsumerController {
@JmsListener(destination = "boot-queue-user")
public void receive(User user){
System.out.println("消费者，接收到："+user);
}
}