（转）RabbitMQ学习之Headers交换类型（java）

http://blog.csdn.net/zhu_tianwei/article/details/40923131

Headers类型的exchange使用的比较少，它也是忽略routingKey的一种路由方式。是使用Headers来匹配的。Headers是一个键值对，可以定义成Hashtable。发送者在发送的时候定义一些键值对，接收者也可以再绑定时候传入一些键值对，两者匹配的话，则对应的队列就可以收到消息。匹配有两种方式all和any。这两种方式是在接收端必须要用键值"x-mactch"来定义。all代表定义的多个键值对都要满足，而any则代码只要满足一个就可以了。fanout，direct，topic exchange的routingKey都需要要字符串形式的，而headers exchange则没有这个要求，因为键值对的值可以是任何类型。

1.生产者Producer.Java

package cn.slimsmart.rabbitmq.demo.headers;

import java.util.Date;
import java.util.Hashtable;
import java.util.Map;

import org.springframework.amqp.core.ExchangeTypes;

import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.AMQP.BasicProperties;
import com.rabbitmq.client.AMQP.BasicProperties.Builder;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

public class Producer {
    private final static String EXCHANGE_NAME = "header-exchange";

    @SuppressWarnings("deprecation")
    public static void main(String[] args) throws Exception {
        // 创建连接和频道
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("192.168.36.102");
        // 指定用户 密码
        factory.setUsername("admin");
        factory.setPassword("admin");
        // 指定端口
        factory.setPort(AMQP.PROTOCOL.PORT);
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

        //声明转发器和类型headers
        channel.exchangeDeclare(EXCHANGE_NAME, ExchangeTypes.HEADERS,false,true,null);
        String message = new Date().toLocaleString() + " : log something";

        Map<String,Object> headers =  new Hashtable<String, Object>();
        headers.put("aaa", "01234");
        Builder properties = new BasicProperties.Builder();
        properties.headers(headers);

        // 指定消息发送到的转发器,绑定键值对headers键值对
        channel.basicPublish(EXCHANGE_NAME, "",properties.build(),message.getBytes());

        System.out.println("Sent message :'" + message + "'");
        channel.close();
        connection.close();
    }
}

2.消费者Consumer.java

package cn.slimsmart.rabbitmq.demo.headers;

import java.util.Hashtable;
import java.util.Map;

import org.springframework.amqp.core.ExchangeTypes;

import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.QueueingConsumer;

public class Consumer {
    private final static String EXCHANGE_NAME = "header-exchange";
    private final static String QUEUE_NAME = "header-queue";

    public static void main(String[] args) throws Exception {
        // 创建连接和频道
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("192.168.36.102");
        // 指定用户 密码
        factory.setUsername("admin");
        factory.setPassword("admin");
        // 指定端口
        factory.setPort(AMQP.PROTOCOL.PORT);
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

        //声明转发器和类型headers
        channel.exchangeDeclare(EXCHANGE_NAME, ExchangeTypes.HEADERS,false,true,null);
        channel.queueDeclare(QUEUE_NAME,false, false, true,null);

        Map<String, Object> headers = new Hashtable<String, Object>();
        headers.put("x-match", "any");//all any
        headers.put("aaa", "01234");
        headers.put("bbb", "56789");
        // 为转发器指定队列，设置binding 绑定header键值对
        channel.queueBind(QUEUE_NAME, EXCHANGE_NAME,"", headers);
        QueueingConsumer consumer = new QueueingConsumer(channel);
        // 指定接收者，第二个参数为自动应答，无需手动应答
        channel.basicConsume(QUEUE_NAME, true, consumer);
        while (true) {
            QueueingConsumer.Delivery delivery = consumer.nextDelivery();
            String message = new String(delivery.getBody());
            System.out.println(message);
        }
    }
}

实例代码：http://download.csdn.net/detail/tianwei7518/8136413