这篇文章主要介绍了RabbitMQ 最常用的三大模式实例解析,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下
Direct 模式
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
public class DirectProducer {
public static void main(String[] args) throws Exception {
//1. 创建一个 ConnectionFactory 并进行设置
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
factory.setVirtualHost("/");
factory.setUsername("guest");
factory.setPassword("guest");
//2. 通过连接工厂来创建连接
Connection connection = factory.newConnection();
//3. 通过 Connection 来创建 Channel
Channel channel = connection.createChannel();
//4. 声明
String exchangeName = "test_direct_exchange";
String routingKey = "item.direct";
//5. 发送
String msg = "this is direct msg";
channel.basicPublish(exchangeName, routingKey, null, msg.getBytes());
System.out.println("Send message : " + msg);
//6. 关闭连接
channel.close();
connection.close();
}
}
import com.rabbitmq.client.*;
import java.io.IOException;
public class DirectConsumer {
public static void main(String[] args) throws Exception {
//1. 创建一个 ConnectionFactory 并进行设置
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
factory.setVirtualHost("/");
factory.setUsername("guest");
factory.setPassword("guest");
factory.setAutomaticRecoveryEnabled(true);
factory.setNetworkRecoveryInterval(3000);
//2. 通过连接工厂来创建连接
Connection connection = factory.newConnection();
//3. 通过 Connection 来创建 Channel
Channel channel = connection.createChannel();
//4. 声明
String exchangeName = "test_direct_exchange";
String queueName = "test_direct_queue";
String routingKey = "item.direct";
channel.exchangeDeclare(exchangeName, "direct", true, false, null);
channel.queueDeclare(queueName, false, false, false, null);
//一般不用代码绑定，在管理界面手动绑定
channel.queueBind(queueName, exchangeName, routingKey);
//5. 创建消费者并接收消息
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(" [x] Received '" + message + "'");
}
};
//6. 设置 Channel 消费者绑定队列
channel.basicConsume(queueName, true, consumer);
}
}
Send message : this is direct msg [x] Received 'this is direct msg'
Topic 模式
可以使用通配符进行模糊匹配
例如
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
public class TopicProducer {
public static void main(String[] args) throws Exception {
//1. 创建一个 ConnectionFactory 并进行设置
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
factory.setVirtualHost("/");
factory.setUsername("guest");
factory.setPassword("guest");
//2. 通过连接工厂来创建连接
Connection connection = factory.newConnection();
//3. 通过 Connection 来创建 Channel
Channel channel = connection.createChannel();
//4. 声明
String exchangeName = "test_topic_exchange";
String routingKey1 = "item.update";
String routingKey2 = "item.delete";
String routingKey3 = "user.add";
//5. 发送
String msg = "this is topic msg";
channel.basicPublish(exchangeName, routingKey1, null, msg.getBytes());
channel.basicPublish(exchangeName, routingKey2, null, msg.getBytes());
channel.basicPublish(exchangeName, routingKey3, null, msg.getBytes());
System.out.println("Send message : " + msg);
//6. 关闭连接
channel.close();
connection.close();
}
}
import com.rabbitmq.client.*;
import java.io.IOException;
public class TopicConsumer {
public static void main(String[] args) throws Exception {
//1. 创建一个 ConnectionFactory 并进行设置
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
factory.setVirtualHost("/");
factory.setUsername("guest");
factory.setPassword("guest");
factory.setAutomaticRecoveryEnabled(true);
factory.setNetworkRecoveryInterval(3000);
//2. 通过连接工厂来创建连接
Connection connection = factory.newConnection();
//3. 通过 Connection 来创建 Channel
Channel channel = connection.createChannel();
//4. 声明
String exchangeName = "test_topic_exchange";
String queueName = "test_topic_queue";
String routingKey = "item.#";
channel.exchangeDeclare(exchangeName, "topic", true, false, null);
channel.queueDeclare(queueName, false, false, false, null);
//一般不用代码绑定，在管理界面手动绑定
channel.queueBind(queueName, exchangeName, routingKey);
//5. 创建消费者并接收消息
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(" [x] Received '" + message + "'");
}
};
//6. 设置 Channel 消费者绑定队列
channel.basicConsume(queueName, true, consumer);
}
}
Send message : this is topc msg [x] Received 'this is topc msg' [x] Received 'this is topc msg'
Fanout 模式
不处理路由键，只需要简单的将队列绑定到交换机上发送到交换机的消息都会被转发到与该交换机绑定的所有队列上。
Fanout交换机转发消息是最快的。
import com.rabbitmq.client.*;
import java.io.IOException;
public class FanoutConsumer {
public static void main(String[] args) throws Exception {
//1. 创建一个 ConnectionFactory 并进行设置
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
factory.setVirtualHost("/");
factory.setUsername("guest");
factory.setPassword("guest");
factory.setAutomaticRecoveryEnabled(true);
factory.setNetworkRecoveryInterval(3000);
//2. 通过连接工厂来创建连接
Connection connection = factory.newConnection();
//3. 通过 Connection 来创建 Channel
Channel channel = connection.createChannel();
//4. 声明
String exchangeName = "test_fanout_exchange";
String queueName = "test_fanout_queue";
String routingKey = "item.#";
channel.exchangeDeclare(exchangeName, "fanout", true, false, null);
channel.queueDeclare(queueName, false, false, false, null);
//一般不用代码绑定，在管理界面手动绑定
channel.queueBind(queueName, exchangeName, routingKey);
//5. 创建消费者并接收消息
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(" [x] Received '" + message + "'");
}
};
//6. 设置 Channel 消费者绑定队列
channel.basicConsume(queueName, true, consumer);
}
}
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
public class FanoutProducer {
public static void main(String[] args) throws Exception {
//1. 创建一个 ConnectionFactory 并进行设置
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
factory.setVirtualHost("/");
factory.setUsername("guest");
factory.setPassword("guest");
//2. 通过连接工厂来创建连接
Connection connection = factory.newConnection();
//3. 通过 Connection 来创建 Channel
Channel channel = connection.createChannel();
//4. 声明
String exchangeName = "test_fanout_exchange";
String routingKey1 = "item.update";
String routingKey2 = "";
String routingKey3 = "ookjkjjkhjhk";//任意routingkey
//5. 发送
String msg = "this is fanout msg";
channel.basicPublish(exchangeName, routingKey1, null, msg.getBytes());
channel.basicPublish(exchangeName, routingKey2, null, msg.getBytes());
channel.basicPublish(exchangeName, routingKey3, null, msg.getBytes());
System.out.println("Send message : " + msg);
//6. 关闭连接
channel.close();
connection.close();
}
}
Send message : this is fanout msg [x] Received 'this is fanout msg' [x] Received 'this is fanout msg' [x] Received 'this is fanout msg'
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。
