关于log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.lib.MutableMetricsFactory).的问题

几天初换IDEA编写java代码，感觉十分的爽，所以决定抛弃eclipse

---------------------------------------上面是题外话--------

今天在运行某程序时出现了如上图所示的问题，查找资料后发现是由于由于log4j这个日志信息打印模块的配置信息没有给出造成的，简单的说就是人家要有个地方来存放日志的打印信息，可是你又不给人家，所以就报错了吧

解决办法：

在你的项目的src目录中创建一个名为log4j.properties的文本文件，记住是文本文件，不是文件夹

然后在你的文本文件中加入如下的内容：

# Configure logging for testing: optionally with log file  

#log4j.rootLogger=debug,appender
log4j.rootLogger=info,appender
#log4j.rootLogger=error,appender  

#\u8F93\u51FA\u5230\u63A7\u5236\u53F0
log4j.appender.appender=org.apache.log4j.ConsoleAppender
#\u6837\u5F0F\u4E3ATTCCLayout
log4j.appender.appender.layout=org.apache.log4j.TTCCLayout

时间： 2024-10-04 17:54:17

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