ssh项目中，log4j可以直接放在src目录下，会被直接加载。也可以放在其他地方，在web.xml中声明加载。
#配置根Logger log4j.rootLogger = [ level ] , appenderName1 , appenderName2 , …
log4j.rootLogger=info, stdout
#配置hibernate的日志
log4j.logger.org.hibernate=info,file
#配置某个包的日志
log4j.logger.com.ys.action=info,test2log
log4j.logger.com.ys.service.impl=info,test3log
log4j.appender.test2log=org.apache.log4j.DailyRollingFileAppender
log4j.appender.test2log.File=e:/log/test2log.log
log4j.appender.test2log.layout=org.apache.log4j.PatternLayout
log4j.appender.test2log.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss} [%c-%L]-[%p] %m %n
log4j.appender.test3log=org.apache.log4j.DailyRollingFileAppender
log4j.appender.test3log.File=e:/log/test3log.log
log4j.appender.test3log.layout=org.apache.log4j.PatternLayout
log4j.appender.test3log.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss} [%c-%L]-[%p] %m %n
#配置各种框架的日志
#log4j.logger.org.springframework=OFF
#log4j.logger.org.apache.struts2=OFF
#log4j.logger.com.opensymphony.xwork2=OFF
#log4j.logger.com.ibatis=OFF
#log4j.logger.org.hibernate=OFF
### direct log messages to stdout ###
#log4j.appender.stdout=org.apache.log4j.ConsoleAppender
#log4j.appender.stdout.Target=System.out
#log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
#log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} [%-5p][%t] method:%l%n %m%n
#log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.FileAppender
log4j.appender.stdout.File=e:/log/test.log
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} [%-5p][%t] method:%l%n %m%n
#log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
### direct messages to file hibernate.log ###
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=test.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
### set log levels - for more verbose logging change 'info' to 'debug' ###
#log4j.rootLogger=info, stdout
#log4j.logger.org.hibernate=info
#log4j.logger.org.hibernate=info
### log HQL query parser activity
#log4j.logger.org.hibernate.hql.ast.AST=debug
### log just the SQL
#log4j.logger.org.hibernate.SQL=debug
### log JDBC bind parameters ###
#log4j.logger.org.hibernate.type=info
log4j.logger.org.hibernate.type=warn
### log schema export/update ###
log4j.logger.org.hibernate.tool.hbm2ddl=debug
### log HQL parse trees
#log4j.logger.org.hibernate.hql=debug
### log cache activity ###
#log4j.logger.org.hibernate.cache=debug
### log transaction activity
#log4j.logger.org.hibernate.transaction=debug
### log JDBC resource acquisition
#log4j.logger.org.hibernate.jdbc=debug
### enable the following line if you want to track down connection ###
### leakages when using DriverManagerConnectionProvider ###
#log4j.logger.org.hibernate.connection.DriverManagerConnectionProvider=trace
参考网址：http://lily200825.iteye.com/blog/1274041