【log4j】springboot项目启动 ,使用的druid数据源，log4j报错 log4j:WARN Please initialize the log4j system properly.

springboot项目启动 ,使用的druid数据源，log4j报错

-- ::21.168  INFO  --- [  restartedMain] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.0..Final}
log4j:WARN No appenders could be found for logger (druid.sql.Connection).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

解决办法：

配置log4j的日志配置文件log4j.properties

log4j.rootLogger=debug, stdout, R

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

log4j.appender.stdout.layout.ConversionPattern=%5p - %m%n

log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=firestorm.log

log4j.appender.R.MaxFileSize=100KB
log4j.appender.R.MaxBackupIndex=

log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n

#log4j.logger.自己的包名=DEBUG
log4j.logger.com.sxd=DEBUG