java实现消息队列的两种方式

xiaoxiao2021-02-28  5

实现消息队列的两种方式

Apache ActiveMQ官方实例发送消息

直接在Apache官网http://activemq.apache.org/download-archives.html下载ActiveMQ源码 下载解压后拿到java代码实例 然后倒入IDE 如下: 请认真阅读readme.md文件,大致意思就是把项目打成两个jar包,然后启动服务,然后同时运行打的两个jar包,然后就能看到具体的调用信息。打jar包时直接利用maven打就行了,不用修改代码。 启动服务:

利用Spring消息模板发送消息

Spirng对Apache ActiveMQ提供了很好的支持 生成者代码:

package com.jms.service.impl; import com.jms.service.ProducerService; import org.springframework.jms.core.JmsTemplate; import org.springframework.stereotype.Service; import javax.annotation.Resource; import javax.jms.Destination; /** * 发送消息 */ @Service public class ProducerServiceImpl implements ProducerService { @Resource private JmsTemplate jmsTemplate; public void sendMessage(Destination destination, String msg) { System.out.println("向队列"+destination+"发送消息"); jmsTemplate.convertAndSend(destination,msg); } public void sendMessage(String msg) { System.out.println("向队列"+jmsTemplate.getDefaultDestination().toString()+"发送消息"); jmsTemplate.convertAndSend(msg); } }

消费者代码:

package com.jms.service.impl; import com.jms.service.CustomerService; import org.springframework.jms.core.JmsTemplate; import org.springframework.stereotype.Service; import javax.annotation.Resource; import javax.jms.Destination; import javax.jms.JMSException; import javax.jms.TextMessage; @Service public class CustomerServiceImpl implements CustomerService { @Resource private JmsTemplate jmsTemplate; /** * 接收消息 * @param destination */ public void receive(Destination destination) { TextMessage textMessage = (TextMessage) jmsTemplate.receive(destination); try { System.out.println("从队列》"+destination.toString()+"成功获取消息》"+textMessage.getText()); } catch (JMSException e) { e.printStackTrace(); } } }

Spring配置代码

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd "> <!-- 启动包扫描功能,以便注册带有@Controller、@Service、@repository、@Component等注解的类成为spring的bean --> <context:component-scan base-package="com.jms.service"> </context:component-scan> <!-- 配置根视图 --> <!--<mvc:view-controller path="/" view-name="index"/>--> <!--启用注解--> <mvc:annotation-driven /> <!-- 视图层配置 --> <!--<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">--> <!--<property name="prefix" value="/WEB-INF/view/"/>--> <!--<property name="suffix" value=".jsp"/>--> <!--</bean>--> <!-- 配置JMS连接工厂 --> <bean id="connectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory"> <property name="brokerURL" value="tcp://localhost:61616" /> </bean> <!-- 定义消息队列(Queue) --> <bean id="queueDestination" class="org.apache.activemq.command.ActiveMQQueue"> <!-- 设置消息队列的名字 --> <constructor-arg> <value>queue1</value> </constructor-arg> </bean> <!-- 配置JMS模板(Queue),Spring提供的JMS工具类,它发送、接收消息。 --> <bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate"> <property name="connectionFactory" ref="connectionFactory" /> <property name="defaultDestination" ref="queueDestination" /> <property name="receiveTimeout" value="10000" /> </bean> </beans>

测试代码

package com.jsm.test; import com.jms.service.CustomerService; import com.jms.service.ProducerService; import org.junit.Test; import org.springframework.context.support.ClassPathXmlApplicationContext; import javax.jms.Destination; /** * 消息队列测试类 */ public class JmsTest { @Test public void producerTest(){ ClassPathXmlApplicationContext springContext = new ClassPathXmlApplicationContext(new String[]{"classpath:spring-core.xml"}); ProducerService producerService = (ProducerService)springContext.getBean("producerServiceImpl"); CustomerService customerService = (CustomerService)springContext.getBean("customerServiceImpl"); Destination destination = (Destination)springContext.getBean("queueDestination"); producerService.sendMessage("测试消息队列"); customerService.receive(destination); } }

测试结果

代码地址 https://github.com/wahnn/SpringJMS https://gitee.com/wahnn/SpringJMS

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