前面幾篇講解了如何使用rabbitMq，這一篇主要講解spring集成rabbitmq。
首先引入配置文件org.springframework.amqp，如下
<dependency>
<groupId>org.springframework.amqp</groupId>
<artifactId>spring-rabbit</artifactId>
<version>1.6.0.RELEASE</version>
</dependency>
<rabbit:connection-factory id="connectionFactory" host="${rabbit.hosts}"
port="${rabbit.port}" username="${rabbit.username}" password="${rabbit.password}" virtual-host="${rabbit.virtualHost}"
channel-cache-size="50"/>
<rabbit:admin connection-factory="connectionFactory"/>
<!--定義消息隊列-->
<rabbit:queue name="spittle.alert.queue.1" durable="true" auto-delete="false"/>
<rabbit:queue name="spittle.alert.queue.2" durable="true" auto-delete="false"/>
<rabbit:queue name="spittle.alert.queue.3" durable="true" auto-delete="false"/>
<!--綁定隊列-->
<rabbit:fanout-exchange id="spittle.fanout" name="spittle.fanout" durable="true">
<rabbit:bindings>
<rabbit:binding queue="spittle.alert.queue.1"></rabbit:binding>
<rabbit:binding queue="spittle.alert.queue.2"></rabbit:binding>
<rabbit:binding queue="spittle.alert.queue.3"></rabbit:binding>
</rabbit:bindings>
</rabbit:fanout-exchange>
二：配置生成者
<import resource="amqp-share.xml"/>
<!--創建消息隊列模板-->
<rabbit:template id="rabbitTemplate" connection-factory="connectionFactory"
exchange="spittle.fanout" message-converter="jsonMessageConverter">
</rabbit:template>
<bean id="jsonMessageConverter" class="org.springframework.amqp.support.converter.JsonMessageConverter"></bean>
三：生產者程序
public class Spittle implements Serializable {
private Long id;
private Spitter spitter;
private String message;
private Date postedTime;
public Spittle(Long id, Spitter spitter, String message, Date postedTime) {
this.id = id;
this.spitter = spitter;
this.message = message;
this.postedTime = postedTime;
}
public Long getId() {
return this.id;
}
public String getMessage() {
return this.message;
}
public Date getPostedTime() {
return this.postedTime;
}
public Spitter getSpitter() {
return this.spitter;
}
}
public class ProducerMain {
public static void main(String[] args) throws Exception {
ApplicationContext context = new ClassPathXmlApplicationContext("amqp/amqp-producer.xml");
AmqpTemplate template = (AmqpTemplate) context.getBean("rabbitTemplate");
for (int i = 0; i < 20; i++) {
System.out.println("Sending message #" + i);
Spittle spittle = new Spittle((long) i, null, "Hello world (" + i + ")", new Date());
template.convertAndSend(spittle);
Thread.sleep(5000);
}
System.out.println("Done!");
}
}
其中convertAndSend方法默認第一個參數是交換機名稱，第二個參數是路由名稱，第三個才是我們發送的數據，現在我們啟動程序，效果如下
第四個：消費者程序
首先編寫一個用於監聽生產者發送信息的代碼
/**
* Created by Administrator on 2016/11/18.
*/
public class SpittleAlertHandler implements MessageListener {
@Override
public void onMessage(Message message) {
try {
String body=new String(message.getBody(),"UTF-8");
System.out.println(body);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
}
一定要注意實現MessageListener，我們只需要獲取message的body即可，通過json來轉換我們需要的程序（比如我們可以發送一個map，map存放方法和實體，這樣我們可以通過反射來調用不同的程序來運行）。
下面我們配置消費者
<import resource="amqp-share.xml"/>
<rabbit:listener-container connection-factory="connectionFactory">
<rabbit:listener ref="spittleListener" method="onMessage" queues="spittle.alert.queue.1,spittle.alert.queue.3,spittle.alert.queue.2"/>
</rabbit:listener-container>
<bean id="spittleListener" class="com.lp.summary.rabbitmq.impl.SpittleAlertHandler"/>
其中spittleListener是監聽的程序，method是執行的方法，queues是我們監聽的隊列，多個隊列可以逗號隔開（因為我們采用的是分發，所以三個隊列獲取的消息是相同的，這裡為了簡便我放在一個監聽程序中了，其實我們可以寫三個消費者，每個消費者監聽一個隊列）
現在只需要啟動程序即可運行
public class ConsumerMain {
public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext("amqp/amqp-consumer.xml");
}
}
當然direct跟上面的情況差不多，只不過這個是根據路由匹配，先把數據發送到交換機，然後綁定路由和隊列，通過交換機id和路由來找到隊列，下面是一些主要的配置
<rabbit:queue id="spring-test-queue1" durable="true" auto-delete="false" exclusive="false" name="spring-test-queue1"></rabbit:queue>
<rabbit:queue name="spring-test-queue2" durable="true" auto-delete="false" exclusive="false"></rabbit:queue>
<!--交換機定義-->
<!--rabbit:direct-exchange：定義exchange模式為direct，
意思就是消息與一個特定的路由鍵完全匹配，才會轉發。
rabbit:binding：設置消息queue匹配的key-->
<rabbit:direct-exchange name="${rabbit.exchange.direct}" durable="true" auto-delete="false" id="${rabbit.exchange.direct}">
<rabbit:bindings>
<rabbit:binding queue="spring-test-queue1" key="spring.test.queueKey1"/>
<rabbit:binding queue="spring-test-queue2" key="spring.test.queueKey2"/>
</rabbit:bindings>
</rabbit:direct-exchange>
<!--spring template聲明-->
<rabbit:template exchange="${rabbit.exchange.direct}" id="rabbitTemplate" connection-factory="connectionFactory"
message-converter="jsonMessageConverter"></rabbit:template>
<!--消息對象轉成成json-->
<bean id="jsonMessageConverter" class="org.springframework.amqp.support.converter.JsonMessageConverter"></bean>
下面是消費者監聽配置
<rabbit:listener-container connection-factory="connectionFactory" acknowledge="auto">
<rabbit:listener queues="spring-test-queue1" method="onMessage" ref="queueListenter"></rabbit:listener>
</rabbit:listener-container>
<rabbit:listener-container connection-factory="connectionFactory" acknowledge="auto">
<rabbit:listener queues="spring-test-queue2" method="onMessage" ref="queueListenter"></rabbit:listener>
</rabbit:listener-container>
下面是程序
public static void main(String[] args) {
ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext-rabbitmq-producer.xml");
MQProducer mqProducer=(MQProducer) context.getBean("mqProducer");
mqProducer.sendDateToQueue("spring.test.queueKey1","Hello World spring.test.queueKey1");
mqProducer.sendDateToQueue("spring.test.queueKey2","Hello World spring.test.queueKey2");
}
實際情況可能需要我們去分離消費者和生成者的程序。當然spring還有負載均衡的配置，這裡就不多介紹了。
