????Spring boot RabbitMQ 简单程序示例
????避免麻烦,直接使用docker启动一个RabbitMQ,命令如下:
docker run -dit --name rabbitmq -p 5672:5672 rabbitmq
<?xml version="1.0" encoding="UTF-8"?>
<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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.1</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.spring.boot.rabbitmq</groupId>
<artifactId>rabbitmqexample</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>rabbitmqexample</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-amqp</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>
????编写一个消费类,接收消息后简单打印,代码大致如下:
import org.springframework.stereotype.Component;
import java.util.concurrent.CountDownLatch;
@Component
public class Receiver {
private CountDownLatch latch = new CountDownLatch(1);
public void receiveMessage(String message) {
System.out.println("Receive < " + message + " >");
latch.countDown();
}
public CountDownLatch getLatch() {
return latch;
}
}
????发送消息,代码大致如下:
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;
import java.util.concurrent.TimeUnit;
@Component
public class Runner implements CommandLineRunner {
private final RabbitTemplate rabbitTemplate;
private final Receiver receiver;
public Runner(Receiver receiver, RabbitTemplate rabbitTemplate) {
this.receiver = receiver;
this.rabbitTemplate = rabbitTemplate;
}
@Override
public void run(String... args) throws Exception {
System.out.println("Sending message ......");
rabbitTemplate.convertAndSend(RabbitmqexampleApplication.topicExchangeName, "foo.bar.baz",
"Hello from RabbitMA!");
receiver.getLatch().await(10000, TimeUnit.MILLISECONDS);
}
}
????直接在主函数中进行配置即可,代码如下:
import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.core.TopicExchange;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer;
import org.springframework.amqp.rabbit.listener.adapter.MessageListenerAdapter;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
@SpringBootApplication
public class RabbitmqexampleApplication {
static final String topicExchangeName = "spring-boot-exchange";
static final String queueName = "spring-boot";
@Bean
Queue queue() {
return new Queue(queueName, false);
}
@Bean
TopicExchange exchange() {
return new TopicExchange(topicExchangeName);
}
@Bean
Binding binding(Queue queue, TopicExchange exchange) {
return BindingBuilder.bind(queue).to(exchange).with("foo.bar.#");
}
@Bean
MessageListenerAdapter listenerAdapter(Receiver receiver) {
return new MessageListenerAdapter(receiver, "receiveMessage");
}
@Bean
SimpleMessageListenerContainer container(ConnectionFactory connectionFactory,
MessageListenerAdapter listenerAdapter) {
SimpleMessageListenerContainer container = new SimpleMessageListenerContainer();
container.setConnectionFactory(connectionFactory);
container.setQueueNames(queueName);
container.setMessageListener(listenerAdapter);
return container;
}
public static void main(String[] args) {
SpringApplication.run(RabbitmqexampleApplication.class, args).close();
}
}
????运行后即可看到输出
原文:https://www.cnblogs.com/freedom-only/p/14277598.html