rabbitmq(2)简单队列

1、模型

一个生产者对应一个消费者:

这里写图片描述

2、代码

2.1、生产者

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private final static String QUEUE_NAME = "hello";

public static void main(String[] args) throws Exception {

ConnectionFactory factory = new ConnectionFactory();
factory.setHost("192.168.1.7");
factory.setUsername("root");
factory.setPassword("123456");

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

/*
* rabbitmq是否将该队列中的消息进行持久化,保证rabbitmq中的消息不会应为rabbitmq重启而丢失
* 已经存在的队列不可以修改该参数,除非进rabbitmq删除该队列,否则会抛出异常
* Caused by: com.rabbitmq.client.ShutdownSignalException:
* channel error; protocol method: #method<channel.close>(reply-code=406, reply-text=PRECONDITION_FAILED
* - inequivalent arg 'durable' for queue 'hello' in vhost '/': received 'true' but current is 'false', class-id=50, method-id=10)
*/
boolean durable = true;
channel.queueDeclare(QUEUE_NAME, durable, false, false, null);
String message = "Hello World!";
channel.basicPublish("", QUEUE_NAME, null, message.getBytes());
System.out.println(" [1] Sent '" + message + "'");

channel.close();
connection.close();
}

2.2、消费者

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private final static String QUEUE_NAME = "hello";

public static void main(String[] args) throws Exception {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("192.168.1.7");
factory.setUsername("root");
factory.setPassword("123456");

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

boolean durable = true;
channel.queueDeclare(QUEUE_NAME, durable, false, false, null);
System.out.println(" [*] Waiting for messages.");
Consumer consumer = new DefaultConsumer(channel) {
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties,
byte[] body) throws IOException {
String message = new String(body, "UTF-8");
System.out.println(" [1] Received '" + message + "'");
}
};
channel.basicConsume(QUEUE_NAME, true, consumer);
}