在Windows Tomcat下部署的log4j日志自动保存到Tomcat下的logs目录下，如果不熟悉Linux的日志输出方式，那么很有可能找不到对应的日志。这篇文章讲述的是如何去找Linux配置的应用输出日志。Linux下配置路径默认是系统路径。
log4j.properties配置
log4j.rootLogger=INFO, Console,RollingFile, D
#Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n
log4j.logger.java.sql.ResultSet=INFO
log4j.logger.org.apache=INFO
log4j.logger.java.sql.Connection=debug
log4j.logger.java.sql.Statement=debug
log4j.logger.java.sql.PreparedStatement=debug
### \u8f93\u51fa\u65e5\u5fd7\u5230\u6587\u4ef6 ###
log4j.appender.RollingFile=org.apache.log4j.DailyRollingFileAppender
log4j.appender.RollingFile.File=logs/fmcgwms.log
log4j.appender.RollingFile.layout=org.apache.log4j.PatternLayout
log4j.appender.RollingFile.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n
### \u8f93\u51fa\u5f02\u5e38\u5230\u6307\u5b9a\u6587\u4ef6 ###
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = logs/fmcgwms_error.log ##
log4j.appender.D.Append = true
log4j.appender.D.Threshold = ERROR
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %d [%t] %-5p [%c] - %m%n %m%n
Windows Tomcat日志输出
Windows下采用的是Tomcat的相对路径，如：C:\App\Tomcat\apache-tomcat-7.0.62\logs,即${TOMCAT_HOME}/logs
Linux Tomcat输出日志
Linux下采用的路径是系统的绝对路径：跟上面log4j配置的路径一致
logs/fmcgwms.log #相当于是/logs/fmcgwms.log
