IDEA 配置 Log4j

1. 在 pom 中导入 log4j 的依赖

<!--log4j依赖-->
<dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.17</version>
</dependency>

2. 在 resource 目录下配置 log4j.properties 文件

#将等级为DEBUG的日志信息输出到console和file这两个目的地
log4j.rootLogger = DEBUG,console,file

#控制台输出的相关设置
log4j.appender.console = org.apache.log4j.ConsoleAppender
log4j.appender.console.Target = System.out
log4j.appender.console.Threshold = DEBUG
log4j.appender.console.layout = org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern = [%c]-%m%n

#文件输出的相关设置
log4j.appender.file = org.apache.log4j.RollingCalendar
log4j.appender.file.File = ./log/c21w.log
log4j.appender.file.MaxFileSize = 10mb
log4j.appender.file.Threshold = DEBUG
log4j.appender.file.layout = org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern = [%p][%d{yy-mm-dd}][%c]%m%n

#日志输出界别
log4j.logger.org.mybatis = DEBUG
log4j.logger.java.sql = DEBUG
log4j.logger.java.sql.Statement = DEBUG
log4j.logger.java.sql.ResultSet = DEBUG
log4j.logger.java.sql.PreparedStatement = DEBUG

IDEA 配置 Log4j

原文：https://www.cnblogs.com/c21w/p/13334011.html