1.安装Erlang语言,和RabbitMQ server(可以选择windows和linux系统)(这个可以百度),我用的windows环境。
进入../sbin (rabbitMQ安装目录)
rabbitmqctl -q status //打印了一些rabbitmq服务状态信息,包括内存,硬盘,和使用erlong的版本信息
rabbitmqctl list_queues //查看所有队列消息
2. 默认情况下RabbitMQ服务的用户名和密码都是“guest”,这个账户是有限制的,默认只能通过localhost访问,远程访问权限受限,所以需要给它添加一个用户,并设置相应的访问权限。
添加一个新用户 "root",密码是“root”:
E:\RabbitMQ\rabbitmq_server-3.7.7\sbin>rabbitmqctl add_user root root Creating user " root " ....
为root用户设置权限:
E:\RabbitMQ\rabbitmq_server-3.7.7\sbin>rabbitmqctl set_permission -p / root ".*" ".*" ".*" Setting permissions for user "root " in vhost "/" ...
设置root用户为管理员角色:
E:\RabbitMQ\rabbitmq_server-3.7.7\sbin>rabbitmqctl set_user_tags root administrator Setting tags for user " root" to [administrator] ...
3.新建maven项目,导入依赖
<dependency>
<groupId>com.rabbitmq</groupId>
<artifactId>amqp-client</artifactId>
<version>5.2.0</version>
</dependency>
4.客户端消息生产者代码
package com.wusu.consumer;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.MessageProperties;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class RabbitmqProducer {
private static final String EXCHANGE_NAME="exchange_demo";
private static final String ROUTING_KEY="routingkey_demo";
private static final String QUEUE_NAME="queue_demo";
private static final String IP_ADDRESS="127.0.0.1";
private static final int PORT=5672;
public static void main(String[] args) throws IOException, TimeoutException {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost(IP_ADDRESS);
factory.setPort(PORT);
factory.setUsername("root");
factory.setPassword("root");
Connection connection = factory.newConnection(); //创建连接
Channel channel = connection.createChannel();//创建信道
//创建一个type="direct" 、持久化,非自动删除的交换器
channel.exchangeDeclare(EXCHANGE_NAME,"direct",true,false,null);
//创建一个持久化,非排他的,非自动删除的队列
channel.queueDeclare(QUEUE_NAME,true,false,false,null);
//将交换器与队列通过路由绑定
channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,ROUTING_KEY);
//发送持久化信息
String message = "hello world";
channel.basicPublish(EXCHANGE_NAME,ROUTING_KEY,MessageProperties.PERSISTENT_TEXT_PLAIN,message.getBytes());
channel.close();
connection.close();
}
}
5.客户端消息消费者代码
package com.wusu.producer;
import com.rabbitmq.client.*;
import org.omg.CORBA.TIMEOUT;
import java.awt.*;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
public class RabbitmqConsumer {
private static final String QUEUE_NAME="queue_demo";
private static final String IP_ADDRESS="127.0.0.1";
private static final int PORT=5672;
public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {
Address[] addresses = {new Address(IP_ADDRESS, PORT)};
ConnectionFactory factory = new ConnectionFactory();
factory.setPassword("root");
factory.setUsername("root");
Connection connection = factory.newConnection(addresses); //创建连接
Channel channel = connection.createChannel();//创建信道
channel.basicQos(64);//设置客户端最多接受违背ack的信息的个数
Consumer consumer = new DefaultConsumer(channel){
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
System.out.println("recieve message :"+new String(body));
try {
TimeUnit.SECONDS.sleep(1);
}catch (InterruptedException e){
e.printStackTrace();
}
channel.basicAck(envelope.getDeliveryTag(),false);
}
};
channel.basicConsume(QUEUE_NAME,consumer);
TimeUnit.SECONDS.sleep(5);
channel.close();
connection.close();
}
}
6.通过rabbitMQ控制台查看消息情况
首先进入安装目录的.../sbin中,使用如下命令开启网页版控制台
E:\RabbitMQ\rabbitmq_server-3.7.7\sbin>rabbitmq-plugins enable rabbitmq_management
然后本地使用http://127.0.0.1:15672 即可打开RabbitMQ的控制台
如下所示,生产者生产了一条消息:
当本地消费者把这条消息消费后,里面的消息就没有了。