本文介紹了如何用Java RabbitMQ發送和接收文件？的處理方法，對大家解決問題具有一定的參考價值，需要的朋友們下面隨著小編來一起學習吧！
問題描述
如何用Java RabbitMQ發送文件？
尤其是使用消息轉換器。
我使用的是Spring框架，可以發送字符串或數組列表，但不能發送文件。我只使用convertAndSend和convertAndReceive發送文件，但獲取：
org.springframework.amqp.AmqpIOException: java.io.FileNotFoundException
我不知道如何使用消息轉換器。here中的代碼并更改某個類：
HelloWorldHandler.java
package org.springframework.amqp.helloworld.async;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import org.springframework.amqp.core.Message;
public class HelloWorldHandler {
public void handleMessage(File message) throws IOException {
BufferedReader br = new BufferedReader(new FileReader(message));
System.out.println(br.readLine());
}
}
ProducerConfiguration.java
package org.springframework.amqp.helloworld.async;
import java.io.File;
import java.util.concurrent.atomic.AtomicInteger;
import org.springframework.amqp.rabbit.connection.CachingConnectionFactory;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor;
@Configuration
public class ProducerConfiguration {
protected final String helloWorldQueueName = "hello.world.queue";
@Bean
public RabbitTemplate rabbitTemplate() {
RabbitTemplate template = new RabbitTemplate(connectionFactory());
template.setRoutingKey(this.helloWorldQueueName);
return template;
}
@Bean
public ConnectionFactory connectionFactory() {
CachingConnectionFactory connectionFactory = new CachingConnectionFactory("x.x.x.x");
connectionFactory.setUsername("username");
connectionFactory.setPassword("password");
return connectionFactory;
}
@Bean
public ScheduledProducer scheduledProducer() {
return new ScheduledProducer();
}
@Bean
public BeanPostProcessor postProcessor() {
return new ScheduledAnnotationBeanPostProcessor();
}
static class ScheduledProducer {
@Autowired
private volatile RabbitTemplate rabbitTemplate;
private final AtomicInteger counter = new AtomicInteger();
@Scheduled(fixedRate = 3000)
public void sendMessage() {
rabbitTemplate.convertAndSend(new File("test.txt"));
}
}
}
推薦答案
您可以將文件內容轉換為字節數組并發送byte[]，如下所示。
byte[] fileData = // get content from file as byte[] [Refer Here][1]
String fileType = // get file type from file
Message message = MessageBuilder.withBody(fileData).setHeader("ContentType", fileType).build();
rabbitTemplate.send("exchnage name", "routing key", message);
這篇關于如何用Java RabbitMQ發送和接收文件？的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，
