【原创】Log4j 日志文件 使用
log4j.properties 代码
log4j.rootLogger=INFO,stdout,R log4j.appender.stdout=org.apache.log4j.ConsoleAppender #其中log4j提供4种布局 log4j.appender.stdout.layout=org.apache.log4j.PatternLayout #R 输出到文件 RollingFileAppender的扩展,可以提供一种日志的备份功能。 log4j.appender.R=org.apache.log4j.RollingFileAppender #日志文件的名称 log4j.appender.R.File=${webappHome}logs/wisdomxf.log #日志文件的大小 log4j.appender.R.MaxFileSize=20KB #保存一个备份文件 log4j.appender.R.MaxBackupIndex=1 log4j.appender.R.layout=org.apache.log4j.PatternLayout log4j.appender.R.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss} [%c]-[%p] %m%n
package com.zwj.tools; import org.apache.log4j.Logger; import org.apache.log4j.PropertyConfigurator; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * @模块功能:读取log4j 配置文件 * @UserName 周文俊 * @Mail [email protected] * @Date 2010-11-19 * @Version V1.0 */ public class Log4jInit extends HttpServlet { private static final long serialVersionUID = 1L; private static Logger logger = Logger.getLogger(Log4jInit.class); public void init() { String prefix = getServletContext().getRealPath("/"); String file = getInitParameter("log4j-init-file"); System.setProperty("webappHome", prefix); if (file != null) { PropertyConfigurator.configure(prefix + file); logger.info(">>>>>>>>>Log4j 日志记录器 已启动.............."); } } public void doGet(HttpServletRequest req, HttpServletResponse res) { } }web.xml
<!-- log4j日志 --> <servlet> <servlet-name>log4j-init</servlet-name> <servlet-class>com.zwj.tools.Log4jInit</servlet-class> <init-param> <param-name>log4j-init-file</param-name> <param-value>WEB-INF/classes/log4j.properties</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet>
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