One of the configuration log4j methods under Struts2

This method is configured in conjunction with LOG4J.

First, the libraries required to import log4j

Second, configure an initially loaded servlet in Web. Xml.

<servlet>
	 <servlet-name>Boottrap</servlet-name>
	 <servlet-class> cn.com.aliex.boottrapservlet</servlet-class>
	 <init-param>
	 	<param-name>xxx</ param-name>
	 	<param-value>123</param-value>
	 </init-param>
	 <load-on-startup >1</load-on-startup>
 </servlet>

Third, the configuration log4j.properties into the project directory.

Log4j.rootlogger=error
Log4j.logger.cn.com.aliex=debug,aliex

log4j.appender.aliex= Org.apache.log4j.RollingFileAppender
log4j.appender.aliex.threshold=debug
log4j.appender.aliex.file=${ Webapproot}\\log\\log.log
log4j.appender.aliex.maxfilesize=8000kb
log4j.appender.aliex.layout= Org.apache.log4j.PatternLayout 
log4j.appender.aliex.layout.conversionpattern=[%d] [%t] [%-5p]%c-%m%n

Iv. initializing log4j in the servlet that initiates the load

		String Currentdir = Getservletcontext (). Getrealpath ("");
		This setting is used to generate directory System.setproperty for log files loaded in log4j
		("Webapproot", Currentdir); 
		System.out.println ("Currentdir---" + currentdir);
		SYSTEM.OUT.PRINTLN ("System uses JDK version--" + System.getproperty ("java.version"));
		Load the log4j configuration file
		try {
			ClassLoader loader = Thread.CurrentThread (). Getcontextclassloader ();
			Properties log4j = new properties ();
			Log4j.load (Loader.getresourceasstream ("conf/log4j.properties"));
			Propertyconfigurator.configure (log4j);
		} catch (IOException e) {
			e.printstacktrace ();
		}

The code can be placed in the init () method.

Directory Structure (MYECLIPSE)