### 消费者 ``` 我们此处假设消费者1只接收两种类型的消息：更新商品和删除商品 ``` ~~~ public class Recv { private final static String QUEUE_NAME = "topic_exchange_queue_1"; private final static String EXCHANGE_NAME = "topic_exchange_test"; public static void main(String[] argv) throws Exception { // 获取到连接 Connection connection = ConnectionUtil.getConnection(); // 获取通道 Channel channel = connection.createChannel(); // 声明队列 channel.queueDeclare(QUEUE_NAME, false, false, false, null); // 绑定队列到交换机，同时指定需要订阅的routing key。需要 update、delete channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "item.update"); channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "item.delete"); // 定义队列的消费者 DefaultConsumer consumer = new DefaultConsumer(channel) { // 获取消息，并且处理，这个方法类似事件监听，如果有消息的时候，会被自动调用 @Override public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body) throws IOException { // body 即消息体 String msg = new String(body); System.out.println(" [消费者1] received : " + msg + "!"); } }; // 监听队列，自动ACK channel.basicConsume(QUEUE_NAME, true, consumer); } } ~~~ ### 消费者2 ``` 我们此处假设消费者2接收所有类型的消息：新增商品，更新商品和删除商品。 ``` ~~~ public class Recv2 { private final static String QUEUE_NAME = "topic_exchange_queue_2"; private final static String EXCHANGE_NAME = "topic_exchange_test"; public static void main(String[] argv) throws Exception { // 获取到连接 Connection connection = ConnectionUtil.getConnection(); // 获取通道 Channel channel = connection.createChannel(); // 声明队列 channel.queueDeclare(QUEUE_NAME, false, false, false, null); // 绑定队列到交换机，同时指定需要订阅的routing key。订阅 insert、update、delete channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "item.*"); // 定义队列的消费者 DefaultConsumer consumer = new DefaultConsumer(channel) { // 获取消息，并且处理，这个方法类似事件监听，如果有消息的时候，会被自动调用 @Override public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body) throws IOException { // body 即消息体 String msg = new String(body); System.out.println(" [消费者2] received : " + msg + "!"); } }; // 监听队列，自动ACK channel.basicConsume(QUEUE_NAME, true, consumer); } } ~~~