Rabbitmq 简明教程

RabbitMQ - Producer Application

现在，我们创建一个生产者应用程序，它将向 RabbitMQ 队列发送消息。

Now let’s create a producer application which will send message to the RabbitMQ Queue.

Create Project

使用 Eclipse 选择 File → New * → *Maven Project 。勾选 创建简单项目（跳过原型选择），然后单击下一步。

Using eclipse, select File → New * → *Maven Project. Tick the *Create a simple project(skip archetype selection) * and click Next.

按照以下所示输入详细信息 −

Enter the details, as shown below −

  1. groupId − com.tutorialspoint

  2. artifactId − producer

  3. version − 0.0.1-SNAPSHOT

  4. name − RabbitMQ Producer

单击“完成”按钮，将创建新项目。

Click on Finish button and a new project will be created.

pom.xml

现在更新 pom.xml 的内容以包含 RabbitMQ 的依赖项。

Now update the content of pom.xml to include dependencies for RabbitMQ.

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.tutorialspoint.activemq</groupId>
   <artifactId>producer</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <name>RabbitMQ Producer</name>
   <properties>
      <java.version>11</java.version>
   </properties>
   <dependencies>
      <dependency>
         <groupId>com.rabbitmq</groupId>
         <artifactId>amqp-client</artifactId>
         <version>5.14.2</version>
      </dependency>
      <dependency>
         <groupId>org.slf4j</groupId>
         <artifactId>slf4j-api</artifactId>
         <version>1.7.26</version>
      </dependency>
      <dependency>
         <groupId>org.slf4j</groupId>
         <artifactId>slf4j-simple</artifactId>
         <version>1.7.26</version>
      </dependency>
   </dependencies>
</project>

现在创建一个生产者类，它将向 RabbitMQ 队列发送消息。

Now create a Producer class which will send message to the RabbitMQ Queue.

package com.tutorialspoint.rabbitmq;

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

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

public class Producer {
   private static String QUEUE = "MyFirstQueue";

   public static void main(String[] args) throws IOException, TimeoutException {
      ConnectionFactory factory = new ConnectionFactory();
      factory.setHost("localhost");
      try (Connection connection = factory.newConnection();
         Channel channel = connection.createChannel()) {
         channel.queueDeclare(QUEUE, false, false, false, null);

         Scanner input = new Scanner(System.in);
         String message;
         do {
            System.out.println("Enter message: ");
            message = input.nextLine();
            channel.basicPublish("", QUEUE, null, message.getBytes());
         } while (!message.equalsIgnoreCase("Quit"));
      }
   }
}

生产者类创建一个连接，创建一个通道，连接到一个队列。如果用户输入“退出”，则应用程序终止，否则它将使用 basicPublish 方法向队列发送消息。

Producer class creates a connection, creates a channel, connects to a queue. If user enters quit then application terminates else it will send the message to the queue using basicPublish method.

我们在 RabbitMQ - Test Application 章节中运行此应用程序。

We’ll run this application in RabbitMQ - Test Application chapter.