SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder"

現象說明

最近在除錯RabbitMQ的時候，簡單的一個小程式，日誌裡如下錯誤：

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
 

RabbitMQ 傳送訊息_程式程式碼如下：

package com.miracle.luna.rabbitmq;

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

import java.nio.charset.StandardCharsets;

/**
 * @author Miracle Luna
 * @date 2021/10/19
 */
public class SendMQ {
    
 
private final static String QUEUE_NAME = "hello";

    public static void main(String[] args) throws Exception{
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        factory.setPort(5672);
        factory.setUsername("guest");
        factory.setPassword(
 
"guest");

        final Connection connection = factory.newConnection();
        final Channel channel = connection.createChannel();
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        String message = "Hello, RabbitMQ!";
        channel.basicPublish("", QUEUE_NAME, null, message.getBytes(StandardCharsets.UTF_8));
        System.out.println("Send '" + message + "'");

        channel.close();
        connection.close();
    }
}

解決方案

在pom檔案中增加 slf4j-simple 的依賴，並 Reload project，如下：

<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-simple -->
<dependency>
   <groupId>org.slf4j</groupId>
   <artifactId>slf4j-simple</artifactId>
   <version>1.7.32</version>
   <scope>compile</scope>
</dependency>

再次執行程式，就不會有報錯日誌了，效果如下：