LOG4 Basic Settings

<span><span># defines the DEBUG priority, R is </span></span>log4j.rootlogger=debug,appender1 for log output purposes 
, Appender2

<pre name= "code" class= "HTML" ><span># Setup log output console
</span>

Log4j.appender.appender1=org.apache.log4j.consoleappender

<span><span># log Output Information format type </span></span>

Log4j.appender.appender1.layout=org.apache.log4j.patternlayout

<span># Log output information is formatted as date, </span><span> priority, full class path, </span> log information, newline <span></span>< Span></span>

LOG4J.APPENDER.APPENDER1.LAYOUT.CONVERSIONPATTERN=[%D{YY/MM/DD Hh:mm:ss:sss}]%p[%c]%m%n
# set log output type, Log4j.appender.appender2=org.apache.log4j.dailyrollingfileappender for file type

# Log Output Information format type Log4j.appender.appender2.layout=org.apache.log4j.patternlayout

# Log output information is formatted as date, log information, newline
Log4j.appender.appender2.layout.conversionpattern=[%d{yy--mm--hh HH:mm:ss}]%m%n

<span># log output file name and address </span>

Log4j.appender.appender2.file=d:/log/log.log

# BACKUP Log

Log4j.appender.appender2.DatePattern = '. ' Yyyy-mm-dd

The Web.xml is set as follows

  <servlet>
  <servlet-name>Log4jInit</servlet-name>
  <servlet-class> full class path </ servlet-class>
  <init-param>
   <param-name>log4j</param-name>
   <param-value >/WEB-INF/classes/log4j.properties</param-value>
  </init-param>
 </servlet>

Implementation class

	Import javax.servlet.ServletException;
	Import Javax.servlet.http.HttpServlet;

	Import Org.apache.log4j.PropertyConfigurator;

	public class Log4jinit extends HttpServlet {
	 private static final long serialversionuid = 1L;
	 public void Destroy () {
	  Super.destroy ();
	 }

	 Public Log4jinit () {
	  super ();
	 }
	 public void Init () throws servletexception {
	  String file =this.getinitparameter ("log4j"); Read from the Web.xml configuration, the name must be configured with the Web.xml consistent
	  if (file!= null) {
	     propertyconfigurator.configure (file);}
	 }}