RabbitMQ-使用Java操作简单队列 simple queues

1.获取连接工具类

 为了方便每次获取连接，封装一个简单的工具类

package com.ithzk.rabbitmq.utils;

import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

/** * @author hzk * @date 2018/3/7 */
public class RabbitMQConnectionUtils {


    /** * 若connection timeout 连接不上尝试关闭防火墙或者放开端口访问 * @return * @throws IOException * @throws TimeoutException */
    public static Connection getConnection() throws IOException, TimeoutException {
        //定义一个连接工厂
        ConnectionFactory connectionFactory = new ConnectionFactory();

        //设置服务器地址
        connectionFactory.setHost("10.200.52.118");

        //AMQP 15672
        connectionFactory.setPort(5672);

        //vhost
        connectionFactory.setVirtualHost("/vhost_hzk");

        //设置用户名
        connectionFactory.setUsername("hzk");

        //设置密码
        connectionFactory.setPassword("hzk");

        return connectionFactory.newConnection();
    }
}

2.消息生产者/发送者

package com.ithzk.rabbitmq.simple;

import com.ithzk.rabbitmq.utils.RabbitMQConnectionUtils;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

/** * @author hzk * @date 2018/3/7 */
public class Send {

    private static final String QUEUE_NAME="test_simple_queue";

    public static void main(String[] args) throws IOException, TimeoutException {

        //获取一个连接
        Connection connection = RabbitMQConnectionUtils.getConnection();

        //从连接中获取一个通道
        Channel channel = connection.createChannel();

        //创建队列申明
        channel.queueDeclare(QUEUE_NAME,false,false,false,null);

        String msg = "simgple queue";

        channel.basicPublish("",QUEUE_NAME,null,msg.getBytes());

        System.out.println("send msg:"+msg);

        channel.close();

        connection.close();

    }
}

3.消息消费者/接收者

 新、老两种接收消息的方式

package com.ithzk.rabbitmq.simple;

import com.ithzk.rabbitmq.utils.RabbitMQConnectionUtils;
import com.rabbitmq.client.*;
import org.junit.Test;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

/** * @author hzk * @date 2018/3/7 */
public class Recv {

    private static final String QUEUE_NAME = "test_simple_queue";

    public static void main(String[] args) throws IOException, TimeoutException {

        //获取连接
        Connection connection = RabbitMQConnectionUtils.getConnection();

        //从连接中获取通道
        Channel channel = connection.createChannel();

        //创建队列申明
        channel.queueDeclare(QUEUE_NAME,false,false,false,null);

        //定义消费者
        DefaultConsumer consumer = new DefaultConsumer(channel) {

            /** * 获取到达消息 * @param consumerTag * @param envelope * @param properties * @param body * @throws IOException */
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                String msg = new String(body, "utf-8");
                System.out.println("recv msg:" + msg);
            }
        };

        //监听队列
        channel.basicConsume(QUEUE_NAME,true,consumer);

    }

    /** * 老方式接收队列信息 * @throws IOException * @throws TimeoutException * @throws InterruptedException */
    @Test
    public void oldRecv() throws IOException, TimeoutException, InterruptedException {
        //获取连接
        Connection connection = RabbitMQConnectionUtils.getConnection();

        //从连接中获取通道
        Channel channel = connection.createChannel();

        //定义队列消费者
        QueueingConsumer queueingConsumer = new QueueingConsumer(channel);

        //监听队列
        channel.basicConsume(QUEUE_NAME,true,queueingConsumer);

        while (true){
            QueueingConsumer.Delivery delivery = queueingConsumer.nextDelivery();
            String msg = new String(delivery.getBody());
            System.out.println("old Recv msg:"+msg);
        }


    }

}

 ps:如若连接超时 connection timeout 检查防火墙配置，可临时关闭防火墙或者放开对应端口访问

service iptables stop 临时关闭防火墙直到手动启动或者是重启电脑
iptables -I INPUT -p tcp --dport xxx -j ACCEPT  开放端口访问