Log4j配置-优快云博客

log4j 的配置

web.xml中配置：

<servlet>
  <servlet-name>LoggingLoader</servlet-name>
  <servlet-class>
   com.neusoft.brm.util.LoggingLoader
  </servlet-class>
  <init-param>
   <param-name>log</param-name>
   <param-value>/config/LogConfig.properties</param-value>
  </init-param>
  <load-on-startup>1</load-on-startup>
</servlet>

自定义java类（LoggingLoader.java）：

package com.neusoft.brm.util;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;

import org.apache.log4j.PropertyConfigurator;

public class LoggingLoader extends HttpServlet {

private static final long serialVersionUID = 1L;

    /**
     * <pre>
     * 初期化のメソッド
     * <pre>
     * @param config ServletConfig
     * @throws ServletException
     */
    public void init(ServletConfig config) throws ServletException {
        super.init(config);
        String prefix = getServletContext().getRealPath("/");
        String file = getInitParameter("log");
        System.out.println("======== 【BRM】 Logger Start ========");
        if (file != null) {
            PropertyConfigurator.configure(prefix + file);
        }
    }
}

自定义property文件（/config/LogConfig.properties）：

#Loggers
log4j.rootLogger=INFO, brmConsole, brmFile

#Appenders
log4j.appender.brmConsole=org.apache.log4j.ConsoleAppender

log4j.appender.brmFile=org.apache.log4j.RollingFileAppender
log4j.appender.brmFile.File=/..//logs//log.txt
log4j.appender.brmFile.MaxFileSize=5120KB
log4j.appender.brmFile.MaxBackupIndex=10

#Layouts
log4j.appender.brmConsole.layout=org.apache.log4j.PatternLayout
log4j.appender.brmConsole.layout.ConversionPattern=%d %p [%c] - <%m>%n

log4j.appender.brmFile.layout=org.apache.log4j.PatternLayout
log4j.appender.brmFile.layout.ConversionPattern=%d %p [%c] - <%m>%n

在应用中使用即可。