前提安装http://mirror.bit.edu.cn/apache/logging/log4j/2.11.2/apache-log4j-2.11.2-bin.zip
Buildpath 配置add extend jar : log4j-1.2.17.jar
project/src/下 新建log4j配置文件
安装完成配置完后依然报错Caused by: java.lang.ClassNotFoundException: org.apache.logging.log4j.LogManager
解决：查看原来是有2个含有 org.apache.logging.log4j.LogManager 类的的包导致一个是之前接口httpclent-api-log4j的,一个是上面下载的
删除http-api-log4j问题解决
送上配置log4.jproperties
### log output control D is debug log output is or not ,E is ERROR OUTPUT is or not control by have D ,E manual control
log4j.rootLogger = error,stdout,D,E
### console logs ###
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n
### debug log ###
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = ./logs/debug/debug.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = DEBUG
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] - [ %p ] %m%n
###error logs ###
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.File = ./logs/error/error.log
log4j.appender.E.Append = true
log4j.appender.E.Threshold = ERROR
log4j.appender.E.layout = org.apache.log4j.PatternLayout
log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] - [ %p ] %m%n
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原文地址：https://www.cnblogs.com/SunshineKimi/p/10540376.html