log4j配置文件

### set log levels ###
log4j.rootLogger = info, stdout , I ,db

### \u8F93\u51FA\u5230\u63A7\u5236\u53F0 ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%n%-6p %m %n==> %l%n

### \u8F93\u51FA\u5230\u65E5\u5FD7\u6587\u4EF6 ###
log4j.appender.I = org.apache.log4j.DailyRollingFileAppender
log4j.appender.I.File = ${shj}/logs/info/log.log
log4j.appender.I.Append = true
log4j.appender.I.Threshold = INFO
log4j.appender.I.layout = org.apache.log4j.PatternLayout
log4j.appender.I.layout.ConversionPattern = %d{yyyy-MM-dd HH:mm:ss} %p %C.%M(%L) : %m%n

log4j.appender.db=org.apache.log4j.jdbc.JDBCAppender
log4j.appender.db.driver=com.mysql.jdbc.Driver
log4j.appender.db.URL=jdbc:mysql://localhost:3306/shj1?useUnicode=true&characterEncoding=UTF-8
log4j.appender.db.user=root
log4j.appender.db.password=123
log4j.appender.db.Threshold = error
log4j.appender.db.sql=insert into shj_log (create_time,log,machinenmb) VALUES ('%d{yyyy-MM-dd HH:mm:ss}', '%m %n','%X{machinenmb}')
log4j.appender.db.layout=org.apache.log4j.PatternLayout
#%c %p %m %n

其中 ${shj}时web.xml里的
<context-param>
<param-name>webAppRootKey</param-name>
  <param-value>shj</param-value>
</context-param>