log4j将日志文件保存到项目中

web.xml:
<context-param>
    <param-name>webAppRootKey</param-name>
    <param-value>webApp.root</param-value>
  </context-param>
 <context-param>
  <param-name>log4jConfigLocation</param-name>
    <param-value>classpath:log4j.properties</param-val

log4j.rootCategory=info, stdout , R

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=[QC] %p [%t] %C.%M(%L) | %m%n

log4j.appender.R=org.apache.log4j.DailyRollingFileAppender
log4j.appender.R.File=D:\workerplace\mylogs-workspace\mylog.log 可以直接配置相对路径
log4j.appender.logfile.File=${webApp.root}/WEB-INF/logs/app.log
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%d-[TS] %p %t %c - %m%n

log4j.logger.com.ibatis=debug
log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=debug
log4j.logger.com.ibatis.common.jdbc.ScriptRunner=debug
log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=debug

log4j.logger.java.sql.Connection=debug
log4j.logger.java.sql.Statement=debug
log4j.logger.java.sql.PreparedStatement=debug,stdout 

ue>
 </context-param>
<listener>  
     <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>  
 </listener>
...

log4j.properties:
log4j.appender.logfile.File=${webApp.root}/WEB-INF/logs/app.log