六、springboot+ activemq

1.创建工程

idea  链接：https://pan.baidu.com/s/1tTY0JBmmqk-GVwm4Q-uxDg 密码：ozjz

file--> new -->project

spring initializr--> 选择默认的  default  -->  next

填好项目信息 --> next 

到这里项目就搭建完成了。

打开 application.properties 文件 添加  spring.activemq.in-memory=true  spring.activemq.pool.enabled=false

spring.activemq.in-memory=true
#是否是内存模式，默认为true.
spring.activemq.pool.enabled=false
#是否创建PooledConnectionFactory，而非ConnectionFactory，默认false

#指定ActiveMQ broker的URL，默认自动生成.#spring.activemq.password#指定broker的密码.#spring.activemq.user#指定broker的用户.

如果使用外部 mq 开启broker-url  将in-memory设置为false

1. 生产者

import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.command.ActiveMQTopic;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.annotation.JmsListener;
import org.springframework.jms.core.JmsMessagingTemplate;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.jms.MessageNotWriteableException;
import javax.jms.Queue;
import javax.jms.Topic;

/**
 * @author Yang
 * @create 2018-04-23 16:50
 * 描述：
 */
@RestController
public class Producer {

    @Autowired
    private JmsMessagingTemplate jmsMessagingTemplate;


    @RequestMapping("sendqueue")
    public void sendQueue(String msg) throws MessageNotWriteableException {
        final Queue queue = new ActiveMQQueue("queue");
        jmsMessagingTemplate.convertAndSend(queue, msg);

    }

    @RequestMapping("sendtopic")
    public void sendTopic(String msg) throws MessageNotWriteableException {
        final Topic topic = new ActiveMQTopic("topic");
        jmsMessagingTemplate.convertAndSend(topic, msg);

    }

    @JmsListener(destination = "returnmsg")

    public void returnmsg(String msg) {

        System.out.println("*********" + msg + "*************");
    }


}

2.消费者

@JmsListener(destination="queue)  监听

@SendTo("returnmsg")，该注解的意思是将return回的值，再发送的"returnmsg"队列中

import org.springframework.jms.annotation.JmsListener;
import org.springframework.messaging.handler.annotation.SendTo;
import org.springframework.stereotype.Component;

/**
 * @author Yang
 * @create 2018-04-23 16:54
 * 描述：
 */
@Component
public class Consumer {

    @JmsListener(destination = "queue")
    @SendTo("returnmsg")
    public String receiveQueue(String msg) {
        System.out.println("==============" + msg + "==================");
        return "老铁我收到了"+msg;
    }

    @JmsListener(destination = "topic")
    @SendTo("returnmsg")
    public String receiveTopic(String msg){
        System.out.println("==topic=====" + msg + "=======topic====");
        return "topic"+msg;
    }

    @JmsListener(destination = "topic")
    public void receiveTopic2(String msg){
        System.out.println("==topic2=====" + msg + "=======topic2====");
    }
}

启动时 添加@EnableJms      @EnableJms会启动jms的注解扫描，相当于<jms:annotation-d riven/>

@SpringBootApplication
@EnableJms
public class DemoApplication {


   public static void main(String[] args) {

      SpringApplication.run(DemoApplication.class, args);
   }
}

队列（queue）：

http://localhost:8080/sendqueue?msg=hello%20mq

测试 topic

需要在  application.properties  添加 

spring.jms.pub-sub-domain=true
#如果为True，则是Topic；如果是false或者默认，则是queue。

http://localhost:8080/sendtopic?msg=hello%20mq%20topic

queue 和topic 二者不共存的，需要让 queue与topic共存 请看下篇文章

七、springboot+activemq topic与 queue 并存实现方案

https://blog.****.net/Mr_yangzc/article/details/80065374