1,写个初始化的SERVLET:
package net.welovetennis.util.log;
import Javax.servlet.*;
import javax.servlet.http.*;
import org.apache.log4j.*;
/**
* <pTitle: </p
* <pDescription: </p
* <pCopyright: Copyright (c) 2004</p
* <pCompany: </p
* @author not attributable
* @version 1.0
*/
public class Log4jInit extends HttpServlet {
//Initialize global variables
public void init() throws ServletException {
String prefix =getServletContext().getRealPath("/");
String file = getInitParameter("log4j");
// if the log4j-init-file is not set, then no point in trying
System.out.println("................log4j start");
if(file != null) {
PropertyConfigurator.configure(prefix+file);
}
}
//Process the HTTP Get request
public void doGet(HttpServletRequest request, HttpServletResponse response) {
}
//Clean up resources
public void destroy() {
}
}
2,修改WEB。XML:
<servlet
<servlet-namelog4jinit</servlet-name
<servlet-classnet.welovetennis.util.log.Log4jInit</servlet-class
<init-param
<param-namelog4j</param-name
<param-valueWEB-INF/log4j.properties</param-value
</init-param
<load-on-startup1</load-on-startup
</servlet
3,在WEB-INF下放配制文件log4j.properties,并指定输出路径:
log4j.rootLogger=INFO, A1 , R
log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss} [%c]-[%p] %m%n
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=c:/project/david/racquet/logs/log4j.log
log4j.appender.R.MaxFileSize=100KB
log4j.appender.R.MaxBackupIndex=1
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n