``` 兩個變化： 1. 聲明Exchange，不再聲明Queue 2. 發送消息到Exchange，不再發送到Queue ``` ~~~ public class Send { private final static String EXCHANGE_NAME = "fanout_exchange_test"; public static void main(String[] argv) throws Exception { // 獲取到連接 Connection connection = ConnectionUtil.getConn(); // 獲取通道 Channel channel = connection.createChannel(); // 聲明exchange，指定類型為fanout channel.exchangeDeclare(EXCHANGE_NAME, "fanout"); // 消息內容 String message = "Hello everyone"; // 發布消息到Exchange channel.basicPublish(EXCHANGE_NAME, "", null, message.getBytes()); System.out.println(" [生產者] Sent '" + message + "'"); channel.close(); connection.close(); } } ~~~