RabbitMQ的使用（五）RabbitMQ Java Client简单生产者、消费者代码示例

pom文件：

    
        
            com.rabbitmq
            amqp-client
            5.0.0
        

        
            org.springframework.amqp
            spring-rabbit
            2.0.2.RELEASE
        

        
            org.springframework.boot
            spring-boot-starter-web
        

        
            org.springframework.boot
            spring-boot-starter-amqp
        
    

连接工具类：

package top.wj.rabbitmq.client.utils;

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

import java.util.HashMap;
import java.util.Map;

public class ChannelUtils {
    public static Channel getChannelInstance(String connectionDescription) {
        try {
            ConnectionFactory connectionFactory = getConnectionFactory();
            Connection connection = connectionFactory.newConnection(connectionDescription);
            return connection.createChannel();
        } catch (Exception e) {
            throw new RuntimeException("获取Channel连接失败");
        }
    }

    private static ConnectionFactory getConnectionFactory() {
        ConnectionFactory connectionFactory = new ConnectionFactory();

        // 配置连接信息
        connectionFactory.setHost("127.0.0.1");
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("/");
        connectionFactory.setUsername("guest");
        connectionFactory.setPassword("guest");

        // 网络异常自动连接恢复
        connectionFactory.setAutomaticRecoveryEnabled(true);
        // 每10秒尝试重试连接一次
        connectionFactory.setNetworkRecoveryInterval(10000);

        return connectionFactory;
    }
}

创建生产者：

package top.wj.rabbitmq.client.producer;

import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.BuiltinExchangeType;
import com.rabbitmq.client.Channel;
import top.wj.rabbitmq.client.utils.ChannelUtils;

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

public class MessageProducer {
    public static void main(String[] args) throws IOException, TimeoutException {
        Channel channel = ChannelUtils.getChannelInstance("队列消息生产者");

        // 声明交换机 (交换机名, 交换机类型, 是否持久化, 是否自动删除, 是否是内部交换机, 交换机属性);
        channel.exchangeDeclare("rabbitmq.wj", BuiltinExchangeType.DIRECT, true, false, false, new HashMap<>());

        // 设置消息属性 发布消息 (交换机名, Routing key, 可靠消息相关属性 后续会介绍, 消息属性, 消息体);
        AMQP.BasicProperties basicProperties = new AMQP.BasicProperties().builder().deliveryMode(2).contentType("UTF-8").build();
        channel.basicPublish("rabbitmq.wj", "add", false, basicProperties, "body中的消息内容！".getBytes());
    }
}

创建消费者：

package top.wj.rabbitmq.client.consumer;

import com.rabbitmq.client.*;
import top.wj.rabbitmq.client.utils.ChannelUtils;

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

public class MessageConsumer {
    public static void main(String[] args) throws IOException, TimeoutException {
        Channel channel = ChannelUtils.getChannelInstance("队列消息消费者");

        // 声明队列 (队列名, 是否持久化, 是否排他, 是否自动删除, 队列属性);
        AMQP.Queue.DeclareOk declareOk = channel.queueDeclare("rabbitmq.wj.add", true, false, false, new HashMap<>());

        // 声明交换机 (交换机名, 交换机类型, 是否持久化, 是否自动删除, 是否是内部交换机, 交换机属性);
        channel.exchangeDeclare("rabbitmq.wj", BuiltinExchangeType.DIRECT, true, false, false, new HashMap<>());

        // 将队列Binding到交换机上 (队列名, 交换机名, Routing key, 绑定属性);
        channel.queueBind(declareOk.getQueue(), "rabbitmq.wj", "add", new HashMap<>());

        // 消费者订阅消息 监听如上声明的队列 (队列名, 是否自动应答(与消息可靠有关 后续会介绍), 消费者标签, 消费者)
        DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println(consumerTag);
                System.out.println(envelope.toString());
                System.out.println(properties.toString());
                System.out.println("消息内容:" + new String(body));
            }
        };
        channel.basicConsume(declareOk.getQueue(), true, "消费者标签",defaultConsumer );
    }
}

控制台打印信息：

消费者标签
Envelope(deliveryTag=1, redeliver=false, exchange=rabbitmq.wj, routingKey=add)
#contentHeader(content-type=UTF-8, content-encoding=null, headers=null, delivery-mode=2, priority=null, correlation-id=null, reply-to=null, expiration=null, message-id=null, timestamp=null, type=null, user-id=null, app-id=null, cluster-id=null)
消息内容:body中的消息内容！

rabbitmq管理界面显示：