修改log4j日志文件保存路径。

src/main/resources/log4j.properties

### \u8F93\u51FADEBUG \u7EA7\u522B\u4EE5\u4E0A\u7684\u65E5\u5FD7\u5230=E://logs/log.log ###
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = /home/tomcat/apache-tomcat-7.0.73/webapps/log.log
log4j.appender.D.File = /home/tomcat/apache-tomcat-7.0.73/webapps/logs/log.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = DEBUG 
log4j.appender.D.layout = org.apache.log4j.PatternLayout
### \u8F93\u51FAERROR \u7EA7\u522B\u4EE5\u4E0A\u7684\u65E5\u5FD7\u5230=E://logs/error.log ###
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.File =/home/tomcat/apache-tomcat-7.0.73/webapps/error.log 
log4j.appender.E.File =/home/tomcat/apache-tomcat-7.0.73/webapps/logs/error.log 
log4j.appender.E.Append = true
log4j.appender.E.Threshold = ERROR 
log4j.appender.E.layout = org.apache.log4j.PatternLayout