springamqp的exchange

参考博客地址：http://www.infoq.com/cn/articles/AMQP-RabbitMQ/、http://www.open-open.com/lib/view/open1453350095355.html

rabbitmq安装地址：http://blog.csdn.net/xia744510124/article/details/51226310

exchange：是一个交换器，负责将生产者生产的消息，选择性交给与它绑定哪个queue，然后通过queue由消费者消费queue中的消息。
exchange的类型有四种：direct、fanout、topic、header
direct:直接交换器，工作方式类似于单播，Exchange会将消息发送完全匹配ROUTING_KEY的Queue
fanout:广播是式交换器，不管消息的ROUTING_KEY设置为什么，Exchange都会将消息转发给所有绑定的queue
topic:交换器用过模式匹配分析消息的routing-key属性。它将routing-key和binding-key的字符串切分成单词。这些单词之间用点隔开。它同样也会识别两个通配符：#匹配0个或者多个单词，*匹配一个单词(记住单词和点分割符)
headers:消息体的header匹配（忽略）
依赖包

<dependency>    <groupId>org.springframework.amqp</groupId>    <artifactId>spring-rabbit</artifactId>    <version>1.5.6.RELEASE</version></dependency>

direct交换方式配置文件
在applicaionContext_1.xml中

<?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:p="http://www.springframework.org/schema/p" xmlns:rabbit="http://www.springframework.org/schema/rabbit"    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/rabbit http://www.springframework.org/schema/rabbit/spring-rabbit-1.5.xsd">    <rabbit:connection-factory id="connectionFactory"        host="xxxxxx" port="5672" username="xxxxxx" password="xxxxxx" />    <!-- <property name="channelCacheSize" value="25"/> -->    <rabbit:template id="amqpTemplate" connection-factory="connectionFactory" reply-timeout="2000" />    <rabbit:admin connection-factory="connectionFactory" />    <rabbit:queue name="hello" />    <rabbit:queue name="world" />    <rabbit:direct-exchange name="direct.exchange">        <rabbit:bindings>            <!--将hello与exchange绑定，并指定一个binding-key-->            <rabbit:binding queue="hello" key="binding" />            <!--将world与exchange绑定，并指定一个binding-key-->            <rabbit:binding queue="world" key="binding" />        </rabbit:bindings>    </rabbit:direct-exchange></beans>

测试代码

@Testpublic void testWithNameAndPassword() {    ApplicationContext acc = new ClassPathXmlApplicationContext("applicationContext_1.xml");    AmqpTemplate template = acc.getBean(AmqpTemplate.class);    //发送消息并指定exchange和routing-key    template.send("direct.exchange", "binding", new Message("nihao".getBytes(), new MessageProperties()));    ((AbstractApplicationContext) acc).destroy();}

代码没执行前Rabbitmq：

可以看到没有任何queue

只存在默认的exchange，没有我们定义名为remoting.exchange的exchange

代码执行后的Rabbitmq：

生成了我们定义的hello、world queue，并队列里面有了一条消息？生产者发布消息的时候会带一个routing-key到指定的exchange，让后exchange根据binding-key和routing-key匹配关系，将消息发到匹配的queue中去

生成了direct.exchange

topic交换方式配置文件

<?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:p="http://www.springframework.org/schema/p" xmlns:rabbit="http://www.springframework.org/schema/rabbit"    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/rabbit http://www.springframework.org/schema/rabbit/spring-rabbit-1.5.xsd">    <rabbit:connection-factory id="connectionFactory"        host="xxxxxx" port="5672" username="xxxxxx" password="xxxxxx" />    <!-- <property name="channelCacheSize" value="25"/> -->    <rabbit:template id="amqpTemplate" connection-factory="connectionFactory" reply-timeout="2000" />    <rabbit:admin connection-factory="connectionFactory" />    <rabbit:queue name="hello" />    <rabbit:queue name="world" />    <rabbit:topic-exchange name="topic.exchange">        <rabbit:bindings>            <!--绑定queue hello和匹配模式 *匹配一个单词-->            <rabbit:binding queue="hello" pattern="he.*" />            <!--绑定queue world和匹配模式 #匹配多个单词-->            <rabbit:binding queue="world" pattern="he.#" />        </rabbit:bindings>    </rabbit:topic-exchange></beans>

测试代码：

@Testpublic void testWithNameAndPassword() {    @SuppressWarnings("resource")    ApplicationContext acc = new ClassPathXmlApplicationContext("applicationContext_1.xml");    AmqpTemplate template = acc.getBean(AmqpTemplate.class);    template.send("topic.exchange", "he.he", new Message("nihao".getBytes(), new MessageProperties()));    ((AbstractApplicationContext) acc).destroy();}

接着direct运行结果再次运行程序

两个队列又多了一条消息?hello的binding-key为he.*,world的binding-key为he.#,发布消息传的routing-key为he.he,显然hello，world队列都能匹配上，所以exchange会把消息都传给它们

生成了topic.exchange并且type为topic

fanout与header就不演示了！