RabbitMQ开发向导

连接RabbitMQ

        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost(IP_ADDRESS);
        factory.setPort(PORT);
        factory.setUsername("root");
        factory.setPassword("root123");

        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

也可使用URI方式来实现

factory.setUri("amqp://userName:password@ipAddress:portNumber/virtualHost");

使用交换器和队列

channel.exchangeDeclare(exchangeName, "direct", true);
String queueName = channel.queueDeclare().getQueue();
channel.queueBind(queueName, exchangeName, routingKey);

发送消息

byte[] messageBodyBytes = "Hello ,World!".getBytes();
channel.basicPublish(exchangeName, routingKey, null, messageBodyBytes);

消费消息

1. 推模式
   不同的订阅采用不同的消费者标签（consumerTag）来区分彼此，在同一个Channel中消费者也需要通过唯一的消费者标签以作区分。

boolean autoAck = false;
channel.basicQos(64);
channel.basicConsume(queueName, autoAck, "myConsumerTag", 
      Consumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println("recv message: " + new String(body));
                try {
                    TimeUnit.SECONDS.sleep(1);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                channel.basicAck(envelope.getDeliveryTag(), false);
            }
        };

2. 拉模式

GetResponse response = channel.basicGet(QUEUE_NAME, false);
channel.basicAck(response.getEnvelope().getDeliveryTag(), false);

消费端的确认和拒绝