一、现象说明

最近在调试 RabbitMQ 程序的时候，日志里如下错误：

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 发送消息_程序代码如下：

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();
    }
}

二、解决方案

在pom文件中增加 slf4j-simple 的依赖，并 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>

（注意本地调试的时候，pom引用里 scope的值是“compile”，而非“test”！！！）

再次运行程序，就不会有报错日志了，效果如下：