Apache log4j 1.2 - Short introduction to log4j
https://logging.apache.org/log4j/1.2/manual.html
log4j日志配置 方法_百度经验
https://jingyan.baidu.com/article/ab0b5630b75edac15afa7dd0.html
Log4J与Tomcat
Spring 使用 Log4J 记录日志_w3cschool
https://www.w3cschool.cn/wkspring/47o21icw.html
Apache log4j 1.2 - Short introduction to log4j
原文：https://www.cnblogs.com/rgqancy/p/10903713.html