log4j

package common;

import org.apache.log4j.Logger;

public class MyLogger {
	public static Logger logger = Logger.getLogger(MyLogger.class);
}

　　定制输出样式

 # ConversionPattern
 # %p-->debug,info,warn,error,fatal
 # %t-->thread name 
 # %c-->class name and package name
 # %M-->method name
 # %l-->happen place line(include package.class.method(line))
 # %L-->line eg:(9)
 # %m-->message
 # %n-->enter.  if system is windows 
,Unix 

 # %d-->date default ISO9601, eg:%d{yyyy-MM-dd HH:mm:ss:SSS},hours HH is 24,hh is 12

　　web.xml

<context-param>
    <param-name>log4jConfigLocation</param-name>
    <param-value>classpath:log4j/log4j.properties</param-value>
  </context-param>
  <listener>
    <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
  </listener>

　　log4j.properties

log4j.rootLogger=debug, stdout, logfile
   
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
log4j.logger.java.sql.ResultSet=DEBUG
  
log4j.logger.org.springframework=ERROR
log4j.logger.org.compass=ERROR
  
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - %m%n
   
log4j.appender.logfile=org.apache.log4j.RollingFileAppender
log4j.appender.logfile.File=empi.log