1.基本介绍

在路由工作模式中，我们需要配置一个类型为direct的交换机，并且需要指定不同的路由键(routing key)，把对应的消息从交换机路由到不同的消息队列进行存储，由消费者进行消费。

P:生产者，向交换机发送消息的时候，会指定一个routing key
X:Exchange(交换机),接收生产者的消息，然后把消息传递给和routing key完全匹配的队列
C1:消费者，它所在队列指定了需要routing key为error的信息
C2：消费者，其所在队列指定了需要routing key 为 info、error、warning 的消息

2.生产者

public class Producer {
    public static String DIRECT_EXCHANGE = " direct_exchange";
    public static String DIRECT_QUEUE_1 = "direct_queue_1";
    public static String DIRECT_QUEUE_2 = "direct_queue_2";

    public static void main(String[] args) {
        try {
            Channel channel = ConnectUtil.getChannel();
            //声明交换机(交换机名称，交换机类型)
            channel.exchangeDeclare(DIRECT_EXCHANGE, BuiltinExchangeType.DIRECT);
            //声明队列
            channel.queueDeclare(DIRECT_QUEUE_1,true,false,false,null);
            channel.queueDeclare(DIRECT_QUEUE_2,true,false,false,null);
            //把交换机和队列1进行绑定
            channel.queueBind(DIRECT_QUEUE_1,DIRECT_EXCHANGE,"error");
            //把交换机和队列2进行绑定
            channel.queueBind(DIRECT_QUEUE_2,DIRECT_EXCHANGE,"info");
            channel.queueBind(DIRECT_QUEUE_2,DIRECT_EXCHANGE,"error");
            channel.queueBind(DIRECT_QUEUE_2,DIRECT_EXCHANGE,"warning");
            //发送消息
            String msg="日志信息:调用了xxx方法，日志级别是info";
             channel.basicPublish(DIRECT_EXCHANGE,"info",null,msg.getBytes());
            System.out.println("消息发送成功");
        } catch (IOException e) {
            e.printStackTrace();
        } catch (TimeoutException e) {
            e.printStackTrace();
        }


    }


}

3.消费者

消费者1

public class Consumer1 {
    public static void main(String[] args) {

        try {
            //获取信道对象
            Channel channel = ConnectUtil.getChannel();
            //消费消息
            DefaultConsumer consumer=new DefaultConsumer(channel){
                @Override
                public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                    System.out.println("消费者1接收到消息:"+new String(body,"UTF-8"));
                    System.out.println("消费者1把日志信息保存到数据库");
                }
            };
            channel.basicConsume(Producer.DIRECT_QUEUE_1,true,consumer);



        } catch (IOException e) {
            e.printStackTrace();
        } catch (TimeoutException e) {
            e.printStackTrace();
        }
    }
}

消费者2

public class Consumer2 {
    public static void main(String[] args) {

        try {
            //获取信道对象
            Channel channel = ConnectUtil.getChannel();
            //消费消息
            DefaultConsumer consumer=new DefaultConsumer(channel){
                @Override
                public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                    System.out.println("消费者2接收到消息:"+new String(body,"UTF-8"));
                    System.out.println("消费者2把日志信息输出到控制台");
                }
            };
            channel.basicConsume(Producer.DIRECT_QUEUE_2,true,consumer);



        } catch (IOException e) {
            e.printStackTrace();
        } catch (TimeoutException e) {
            e.printStackTrace();
        }
    }
}