springboot如何整合阿里云iot的AMQP示例代码保持长连接
时间: 2023-10-27 11:16:19 浏览: 265
可以使用阿里云提供的Java SDK来实现与AMQP服务器建立长连接。以下是一个简单的示例:
1. 添加依赖
在pom.xml中添加以下依赖:
```
<dependency>
<groupId>com.aliyun</groupId>
<artifactId>aliyun-java-sdk-core</artifactId>
<version>4.5.0</version>
</dependency>
<dependency>
<groupId>com.aliyun</groupId>
<artifactId>aliyun-java-sdk-amqp</artifactId>
<version>1.0.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-amqp</artifactId>
</dependency>
```
2. 配置AMQP连接参数
在application.properties中配置AMQP连接参数:
```
spring.rabbitmq.host=amqp://xxxxx.mq-amqp.cn-shanghai-a.aliyuncs.com
spring.rabbitmq.username=xxxxx
spring.rabbitmq.password=xxxxx
```
3. 编写AMQP客户端代码
在Spring Boot应用程序中,可以使用@RabbitListener注释来创建AMQP客户端。以下是一个简单的示例:
```
@Configuration
@EnableRabbit
public class AmqpConfig {
@Bean
public ConnectionFactory connectionFactory() {
CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
connectionFactory.setHost(environment.getProperty("spring.rabbitmq.host"));
connectionFactory.setUsername(environment.getProperty("spring.rabbitmq.username"));
connectionFactory.setPassword(environment.getProperty("spring.rabbitmq.password"));
return connectionFactory;
}
@Bean
public SimpleMessageListenerContainer messageListenerContainer(ConnectionFactory connectionFactory) {
SimpleMessageListenerContainer container = new SimpleMessageListenerContainer();
container.setConnectionFactory(connectionFactory);
container.setQueueNames("amqp.queue.example");
container.setMessageListener(new MessageListenerAdapter(new AmqpMessageHandler()));
return container;
}
public static class AmqpMessageHandler {
// 处理接收到的消息
public void handleMessage(String message) {
System.out.println("Received message: " + message);
}
}
}
```
在上面的代码中,我们定义了一个名为messageListenerContainer的消息监听器容器。该容器使用我们在步骤2中配置的连接工厂和队列名称。消息监听器是一个简单的处理程序,它将打印接收到的消息。
4. 启动应用程序
现在,我们可以启动应用程序并开始接收来自AMQP服务器的消息。当应用程序启动时,它将建立一个长连接并开始监听队列。如果接收到新消息,它将调用我们在步骤3中定义的消息处理程序。
```
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
```
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