rabbitmq的java调用实例

本文将介绍rabbitmq在用java进行调用的代码实现

一、添加maven依赖

    com.rabbitmq
    amqp-client
    4.1.0

二、消息生产者

关键点如下：

1、创建ConnectionFactory，包括设置rabbitmq服务的地址与端口号（amqp默认端口是5672）、用户名、密码、vhost(默认是/) ;

2、获取Connection ;

3、获取Channel ,并在其上声明queue、exchanger，并通过routingkey把queue在exchanger进行绑定 ;

代码实例如下：

public class RabbitmqProducerMain {


    public static void main(String[] args) throws Exception {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("192.168.0.107");
        factory.setPort(5672);
        factory.setUsername("admin");
        factory.setPassword("123456");
        factory.setVirtualHost("vhostOne");

        Connection connection =  factory.newConnection();

        Channel channel = connection.createChannel();
        String queueName = "queueOne";
        String exchangeName = "exchangerOne";
        String routingKey = "queueOne";
        channel.exchangeDeclare(exchangeName,"direct");
        channel.queueDeclare(queueName,false,false,false,null);
        channel.queueBind(queueName,exchangeName,routingKey);

        int msgCnt =15000;
        while(msgCnt-->0){
            String msg = "msg"+Math.random()*100;
            channel.basicPublish(exchangeName,routingKey,null,msg.getBytes());  //发送消息
            System.out.println("produce msg :"+msg);
            TimeUnit.MILLISECONDS.sleep((long) (Math.random()*500));
        }
        channel.close();
        connection.close();
    }


}

三、消息消费者

关键点如下：

1、创建ConnectionFactory，包括设置rabbitmq服务的地址与端口号（amqp默认端口是5672）、用户名、密码、vhost(默认是/) ;

2、获取Connection ;

3、获取Channel ,并在其上声明queue ;

4、定义消费消息Consumer；

5、消费消息channel.basicConsume(queueName,false,"queueOne",consumer);

代码实例如下：

public class RabbitmqConsumerMain {

    public static void main(String[] args) throws Exception {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("192.168.0.107");
        factory.setPort(5672);
        factory.setUsername("admin");
        factory.setPassword("123456");
        factory.setVirtualHost("vhostOne");

        Connection connection =  factory.newConnection();

        Channel channel = connection.createChannel();
        String queueName = "queueOne";
        channel.queueDeclare(queueName,false,false,false,null);

        channel.basicQos(5);  //每次取5条消息

        Consumer consumer = new DefaultConsumer(channel){
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                //消费消费
                String msg = new String(body,"utf-8");
                System.out.println("consume msg: "+msg);
                try {
                    TimeUnit.MILLISECONDS.sleep((long) (Math.random()*500));
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                //手动消息确认
                getChannel().basicAck(envelope.getDeliveryTag(),false);
            }
        };


        //调用消费消息
        channel.basicConsume(queueName,false,"queueOne",consumer);

    }
}