SSH框架学习（五、加入log4j）

原文转自：http://blog.csdn.net/wuyt2008/article/details/8244195

log4j是个很多人喜欢用的日志工具，随大流咯。

log4j的最新版是2.0-beat3，稳妥起见，我用了log4j 1.2.17，下载地址：http://logging.apache.org/log4j/1.2/download.html

导入包，在src目录下添加log4j的配置文件：log4j.properties，下面这个是网络上下载来的，看起来不错。

 #------------------------------------------------------------------------------
 #
 #  The following properties set the logging levels and log appender.  The
 #  log4j.rootCategory variable defines the default log level and one or more
 #  appenders.  For the console, use 'S'.  For the daily rolling file, use 'R'.
 #  For an HTML formatted log, use 'H'.
 #
 #  To override the default (rootCategory) log level, define a property of the
 #  form (see below for available values):
 #
 #        log4j.logger. =
 #
 #    Available logger names:
 #      TODO
 #
 #    Possible Log Levels:
 #      FATAL, ERROR, WARN, INFO, DEBUG
 #
 #------------------------------------------------------------------------------
 log4j.rootCategory=INFO, S

 log4j.logger.com.dappit.Dapper.parser=ERROR
 log4j.logger.org.w3c.tidy=FATAL

 #------------------------------------------------------------------------------
 #
 #  The following properties configure the console (stdout) appender.
 #  See http://logging.apache.org/log4j/docs/api/index.html for details.
 #
 #------------------------------------------------------------------------------
 log4j.appender.S = org.apache.log4j.ConsoleAppender
 log4j.appender.S.layout = org.apache.log4j.PatternLayout
 log4j.appender.S.layout.ConversionPattern = %d{yyyy-MM-dd HH:mm:ss} %c{1} [%p] %m%n

 #------------------------------------------------------------------------------
 #
 #  The following properties configure the Daily Rolling File appender.
 #  See http://logging.apache.org/log4j/docs/api/index.html for details.
 #
 #------------------------------------------------------------------------------
 log4j.appender.R = org.apache.log4j.DailyRollingFileAppender
 log4j.appender.R.File = logs/bensApps.log
 log4j.appender.R.Append = true
 log4j.appender.R.DatePattern = '.'yyy-MM-dd
 log4j.appender.R.layout = org.apache.log4j.PatternLayout
 log4j.appender.R.layout.ConversionPattern = %d{yyyy-MM-dd HH:mm:ss} %c{1} [%p] %m%n

 #------------------------------------------------------------------------------
 #
 #  The following properties configure the Rolling File appender in HTML.
 #  See http://logging.apache.org/log4j/docs/api/index.html for details.
 #
 #------------------------------------------------------------------------------
 log4j.appender.H = org.apache.log4j.RollingFileAppender
 log4j.appender.H.File = logs/bensApps.html
 log4j.appender.H.MaxFileSize = 100KB
 log4j.appender.H.Append = false
 log4j.appender.H.layout =org.apache.log4j.HTMLLayout

在hibernate的配置里面，添加

 <property name="show_sql">true</property>
 <property name="format_sql">true</property>

这样，就能在控制台显示sql语句了，而且还排了下版。