进入官网:http://logging.apache.org/log4j/1.2/manual.html
适用于ssm框架的日志配置文件:
log4j.rootLogger = DEBUG , stdout
log4j.logger.org.mybatis = DEBUG
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = %5p %d %C: %m%n