C语言系统化精讲 重塑你的编程思想 打造坚实的开发基础

C语言系统化精讲 重塑你的编程思想 打造坚实的开发基础

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1.基本行列音讯发送和接纳

简单模型，使用默许exchange，发送到指定queue，1对1发送接纳。
发送方-->(默许Exchange)-->Queue-->接纳方

（1）发送指定行列音讯
import java.io.IOException;
import java.util.concurrent.TimeoutException;

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

public class SendDemo {
private final static String QUEUE_NAME = "hello";

public static void main(String[] argv) {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
Connection connection = null;
try {
connection = factory.newConnection();
Channel channel = connection.createChannel();
// 界说非耐久queue
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
String message = "Hello World!";
// 发送音讯到默许exchange，指定queue
channel.basicPublish("", QUEUE_NAME, null, message.getBytes("UTF-8"));
System.out.println(" [x] Sent '" + message + "'");
channel.close();
connection.close();
} catch (IOException e) {
e.printStackTrace();
} catch (TimeoutException e) {
e.printStackTrace();
}
}
}

（2）经过拉形式消费音讯（不引荐）
import java.io.IOException;
import java.util.concurrent.TimeoutException;

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

/**
* 经过拉形式消费音讯（不引荐）
*
* @date 2019年3月8日 下午3:31:14
*/
public class RecvPull {
private final static String QUEUE_NAME = "hello";

public static void main(String[] argv) {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
Connection connection = null;
try {
connection = factory.newConnection();
Channel channel = connection.createChannel();
// 界说非耐久queue
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
System.out.println(" [*] Waiting for messages. To exit press CTRL+C");
// 开端消费指定queue的音讯
while (true) {
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
GetResponse response = channel.basicGet(QUEUE_NAME, true);
if (response == null) {
continue;
}
String responseStr = new String(response.getBody());
System.out.println("responseStr: " + responseStr);
}
} catch (IOException e) {
e.printStackTrace();
} catch (TimeoutException e) {
e.printStackTrace();
}
}
}

（3）经过推形式消费音讯（引荐）
import java.io.IOException;
import java.util.concurrent.TimeoutException;

import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.Consumer;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;

/**
* 经过推形式消费音讯（引荐）
*
* @date 2019年3月8日 下午3:31:56
*/
public class RecvPush {
private final static String QUEUE_NAME = "hello";

public static void main(String[] argv) {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
Connection connection = null;
try {
connection = factory.newConnection();
Channel channel = connection.createChannel();
// 界说非耐久queue
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
System.out.println(" [*] Waiting for messages. To exit press CTRL+C");
// 界说监听消费者
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 + "'");
}
};
// 开端消费指定queue的音讯
channel.basicConsume(QUEUE_NAME, true, consumer);

} catch (IOException e) {
e.printStackTrace();
} catch (TimeoutException e) {
e.printStackTrace();
}
}
}