log4j:WARN No appenders could be found for logger警告解决方案

import org.apache.log4j.Logger;

public class LoggerTry

{

    private static Logger logger=Logger.getLogger(LoggerTry.class);

    public static void main(String args[])

    {

       System.out.println("xiayanhua");

       logger.debug("this is logger4j");

    }

}

 

打印信息应该是：

xiayanhua

DEBUG - this is logger4j

 

但出现了如下警告：log4j:WARN No appenders could be found for logger

且logger无法输出日志信息。

 

解决办法：只需将log4j.properties放置在src文件夹目录下即可。