RabbitMQ 入门

    ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("localhost");
    Connection connection = factory.newConnection();
    Channel channel = connection.createChannel();
 
    channel.queueDeclare(QUEUE_NAME, false, false, false, null); //(如果没有就)创建Queue
    String message = "Hello World!";
    channel.basicPublish("", QUEUE_NAME, null, message.getBytes());//以byte的方式发布
    System.out.println(" [x] Sent ‘" + message + "‘");
 
    channel.close();
    connection.close();

    ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("localhost");
    Connection connection = factory.newConnection();
    Channel channel = connection.createChannel();
 
    channel.queueDeclare(QUEUE_NAME, false, false, false, null);//看一下Queue是否存在
 
    QueueingConsumer consumer = new QueueingConsumer(channel);
    channel.basicConsume(QUEUE_NAME, true, consumer);
 
    while (true) {
      QueueingConsumer.Delivery delivery = consumer.nextDelivery();//阻塞，直到接收到一条消息
      String message = new String(delivery.getBody());
      System.out.println(" [x] Received ‘" + message + "‘");
    }

String EXCHANGE_NAME = "logs";
 
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
// 设置 exchange 类型
channel.exchangeDeclare(EXCHANGE_NAME /*exchange名称*/, "fanout"/*类型*/);
// 发布消息时，指定 exchange 名称
channel.basicPublish( EXCHANGE_NAME , "", null, message.getBytes());
channel.close();
connection.close();

ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
// 设置exchange名称和类型
channel.exchangeDeclare(EXCHANGE_NAME, "fanout");
// 创建一个临时的、带有随机名称的Queue，用来与 exchange 绑定
String queueName = channel.queueDeclare().getQueue();
hannel.queueBind(queueName, EXCHANGE_NAME, ""); // 绑定
System.out.println(" [*] Waiting for messages. To exit press CTRL+C");
QueueingConsumer consumer = new QueueingConsumer(channel);
channel.basicConsume(queueName, true, consumer);
while (true) {
            QueueingConsumer.Delivery delivery = consumer.nextDelivery();
            String message = new String(delivery.getBody());
            System.out.println(" [x] Received ‘" + message + "‘");
 }