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    轉自：http://musicbox95351.iteye.com/blog/868526
    比如項目為一個UserServlet，主要分三步
    1 日志輸出文件log4j.xml的配置。
    2 加載日志配置文件的servlet類。
    3 web.xml配置

    第一步：

1

<?xml version="1.0" encoding="UTF-8" ?>
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<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
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<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
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<appender name="infoChannel"
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class="org.apache.log4j.RollingFileAppender">
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<param name="File" value="${catalina.home}/logs/tourist_guide_system_server.log" />
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<param name="Append" value="true" />
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<param name="MaxBackupIndex" value="10" />
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<param name="MaxFileSize" value="10KB"/>
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<layout class="org.apache.log4j.PatternLayout">
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<param name="ConversionPattern" value="%-d{yyyy-MM-dd HH:mm:ss} [%c]-[%p] %m%n" />
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</layout>
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<filter class="org.apache.log4j.varia.LevelRangeFilter">
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<param name="LevelMin" value="INFO" />
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<param name="LevelMax" value="INFO" />
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</filter>
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</appender>
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<appender name="debugChannel"
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class="org.apache.log4j.RollingFileAppender">
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<param name="File" value="${catalina.home}/logs/testdebug.log" />
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<param name="Append" value="true" />
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<param name="MaxBackupIndex" value="10" />
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<param name="MaxFileSize" value="10KB"/>
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<layout class="org.apache.log4j.PatternLayout">
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<param name="ConversionPattern" value="%-d{yyyy-MM-dd HH:mm:ss} [%c]-[%p] %m%n" />
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</layout>
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<filter class="org.apache.log4j.varia.LevelRangeFilter">
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<param name="LevelMin" value="DEBUG" />
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<param name="LevelMax" value="DEBUG" />
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</filter>
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</appender>
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<appender name="STDOUT" class="org.apache.log4j.ConsoleAppender">
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<layout class="org.apache.log4j.PatternLayout">
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<param name="ConversionPattern"
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value="%-4r [%t] %-5p %c %x - %m%n" />
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</layout>
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<filter class="org.apache.log4j.varia.LevelRangeFilter">
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<param name="levelMin" value="info" />
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<param name="levelMax" value="info" />
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<param name="AcceptOnMatch" value="true" />
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</filter>
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</appender>
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<root>
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<priority value="INFO" />
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<appender-ref ref="debugChannel" />
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<appender-ref ref="infoChannel" />
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<appender-ref ref="STDOUT" />
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</root>
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</log4j:configuration>

第二步：

1

2

import java.io.IOException;
3

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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.log4j.xml.DOMConfigurator;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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public class UserServlet extends HttpServlet {
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private static final Logger log = LoggerFactory.getLogger(UserServlet.class);
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public UserServlet(){}
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public void init() throws ServletException {
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log.info("Initializing, My MyActionServlet init this System's Const Variable");
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String prefix = this.getServletConfig().getServletContext().getRealPath("/");//讀取項目的路徑
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String file = this.getServletConfig().getInitParameter("log4j");//讀取log4j相對路徑
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String filePath = prefix + file;
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DOMConfigurator.configure(filePath);//加載.xml文件
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log.info("Initializing, end My Init");
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super.init();//此方法不能省，ActionServlet覆蓋了的此方法中有很多重要操作
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}
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}

第三步：web.xml文件中增加servlet配置

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<servlet>
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<servlet-name>userServlet</servlet-name>
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<servlet-class>com.richhouse.servlet.UserServlet</servlet-class>
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<init-param>
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<param-name>log4j</param-name>
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<param-value>/WEB-INF/log4j.xml</param-value>
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</init-param>
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<load-on-startup>1</load-on-startup>
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</servlet>
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<servlet-mapping>
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<servlet-name>userServlet</servlet-name>
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<url-pattern>/userServlet</url-pattern>
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</servlet-mapping>

posted on 2014-05-26 11:13 Terry Zou 閱讀(1429) 評論(0) 編輯收藏所屬分類: Tomcat+Eclipse

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