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idea运行无输出

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#1 Created at ... [Delete] [Delete and Lock User]

平台：jdk8、idea

将`commons-logging-1.3.0.jar`复制到lib目录，在idea中将jar包添加为库。

运行却没有输出，没有使用log4j

代码：

package org.example;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class Main {

public static void main(String[] args) {

Log log = LogFactory.getLog(Main.class);
log.info("start...");
log.warn("end.");

}

}

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#2 Created at ... [Delete] [Delete and Lock User]

玄学，重新创建了个新项目又好了

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#3 Created at ... [Delete] [Delete and Lock User]

我tm笑死,玄学组+1分,但你新建项目好了,应该是你项目建立的时候有设置没调好

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