J2EE工程+Log4j日誌

1.首先在WEB.XML中加上

 

<!-- log4j begin --><br /> <servlet><br />　　<servlet-name>log4j-init</servlet-name><br />　　<servlet-class>com.koal.ceshi.Log4jInit</servlet-class><br />　　<init-param><br />　　<param-name>log4j-init-file</param-name><br />　　<param-value>/WEB-INF/log4j.properties</param-value><br />　　</init-param><br />　　<load-on-startup>1</load-on-startup><br />　　</servlet><br /><!-- log4j end -->

 

2. 在/WEB-INF/log4j.properties目錄下建立log4j.properties，內容為

<br /> log4j.rootLogger = DEBUG, stdout, R<br /> log4j.rootCategory=INFO, stdout , R</p><p> log4j.appender.stdout=org.apache.log4j.ConsoleAppender<br /> log4j.appender.stdout.layout=org.apache.log4j.PatternLayout<br /> log4j.appender.stdout.layout.ConversionPattern=[QC] %p [%t] %C.%M(%L) | %m%n</p><p> log4j.appender.R=org.apache.log4j.DailyRollingFileAppender<br /> log4j.appender.R.File=./log4j.log<br /> log4j.appender.R.layout=org.apache.log4j.PatternLayout<br /> log4j.appender.R.layout.ConversionPattern=%d-[TS] %p %t %c - %m%n</p><p> log4j.logger.com.neusoft=DEBUG<br /> log4j.logger.com.opensymphony.oscache=ERROR<br /> log4j.logger.net.sf.navigator=ERROR<br /> log4j.logger.org.apache.commons=ERROR<br /> log4j.logger.org.apache.struts=WARN<br /> log4j.logger.org.displaytag=ERROR<br /> log4j.logger.org.springframework=DEBUG<br /> log4j.logger.com.ibatis.db=WARN<br /> log4j.logger.org.apache.velocity=FATAL</p><p> log4j.logger.com.canoo.webtest=WARN</p><p> log4j.logger.org.hibernate.ps.PreparedStatementCache=WARN<br /> log4j.logger.org.hibernate=DEBUG<br /> log4j.logger.org.logicalcobwebs=WARN<br />

 

3. 在lib目錄下載入

log4j-1.2.8.jar 和 commons-logging.jar

 

4. 在servlet或者action中加上

private static Log log =<br />LogFactory.getLog(SRTHPrepareData.class.getName());

然後在需要記錄日誌的地方加上類似

log.error("資料為空白");

 

5 然後運行之後到log4j.log檔案中去查看日誌