如何创建SpringBoot项目
访问https://start.spring.io/。
依次选择构建工具Maven Project、语言java、Spring Boot版本2.0.5，点击Generate Project下载项目压缩包，解压后倒入到ide中即可。（idea集成了SpringBoot，可直接创建项目）
如何整合ActiveMQ
1、添加spring-boot-starter-activemq依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-activemq</artifactId>
</dependency>
2、添加配置
spring.activemq.in-memory=true
spring.activemq.pool.enabled=false
3、添加SampleActiveMQApplication类
@SpringBootApplication
@EnableJms
public class SampleActiveMQApplication {
@Bean
public Queue queue() {
return new ActiveMQQueue("sample.queue");
}
public static void main(String[] args) {
SpringApplication.run(SampleActiveMQApplication.class, args);
}
}
4、添加Consumer类
@Component
public class Consumer {
@JmsListener(destination = "sample.queue")
public void receiveQueue(String text) {
System.out.println(text);
}
}
5、添加Producer类
@Component
public class Producer implements CommandLineRunner {
@Autowired
private JmsMessagingTemplate jmsMessagingTemplate;
@Autowired
private Queue queue;
@Override
public void run(String... args) throws Exception {
send("Sample message");
System.out.println("Message was sent to the Queue");
}
public void send(String msg) {
this.jmsMessagingTemplate.convertAndSend(this.queue, msg);
}
}
6、启动服务
控制台输出：
Message was sent to the Queue
Sample message
以上例子使用的是SpringBoot内部的ActiveMQ，实际使用时肯定会用外部的ActiveMQ。
如何连接外部的ActiveMQ
1、添加依赖
<dependency>
<groupId>org.apache.activemq</groupId>
<artifactId>activemq-pool</artifactId>
</dependency>
2、修改配置
spring.activemq.broker-url=tcp://localhost:61616
spring.activemq.close-timeout=5000
spring.activemq.in-memory=false
spring.activemq.pool.enabled=true
spring.activemq.pool.max-connections=100
spring.activemq.send-timeout=3000
3、启动服务
首先，确保ActiveMQ已经启动。控制台输出：
Message was sent to the Queue
Sample message
如何使用topic
1、在SampleActiveMQApplication中添加：
@Bean
public Topic topic() {
return new ActiveMQTopic("sample.topic");
}
@Bean
public JmsListenerContainerFactory<?> jmsListenerContainerTopic(ConnectionFactory activeMQConnectionFactory) {
DefaultJmsListenerContainerFactory bean = new DefaultJmsListenerContainerFactory();
bean.setPubSubDomain(true);
bean.setConnectionFactory(activeMQConnectionFactory);
return bean;
}
2、创建TopicConsumer类
@Component
public class TopicConsumer {
@JmsListener(destination = "sample.topic", containerFactory = "jmsListenerContainerTopic")
public void receiveTopic1(String text) {
System.out.println(text);
}
@JmsListener(destination = "sample.topic", containerFactory = "jmsListenerContainerTopic")
public void receiveTopic2(String text) {
System.out.println(text);
}
}
3、创建TopicProducer类
@Component
public class TopicProducer implements CommandLineRunner {
@Autowired
private JmsMessagingTemplate jmsMessagingTemplate;
@Autowired
private Topic topic;
@Override
public void run(String... args) throws Exception {
send("Topic message");
System.out.println("Message was sent to the Topic");
}
public void send(String msg) {
this.jmsMessagingTemplate.convertAndSend(this.topic, msg);
}
}
4、启动服务
控制台输出：
Message was sent to the Topic
Topic message
Topic message