Log4j配置實例（log4j.xml）

import java.net.URL;

 

import org.apache.log4j.xml.DOMConfigurator;

 

/**

 * 單實例 讀取log4j配置文件，初始化log4j

 * 

 */

public class Log4jXMLConfig

{

    private static Log4jXMLConfig instance;

 

    public static synchronized Log4jXMLConfig initia()

    {

        if (instance == null)

        {

            return new Log4jXMLConfig();

        }

        return instance;

    }

 

    private Log4jXMLConfig()

    {

        final URL url = Log4jXMLConfig.class.getResource("log4j.xml");

        DOMConfigurator.configure(url);

    }

}

 

 

 

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

 

<log4j:configuration>

 

 <appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">

  <layout class="org.apache.log4j.PatternLayout">

   <param name="ConversionPattern"

    value="%d - %c -%-4r [%t] %-5p %x - %m%n" />

  </layout>

 

  <!--限制輸出級別-->

  <filter class="org.apache.log4j.varia.LevelRangeFilter">

   <param name="LevelMax" value="ERROR"/>

   <param name="LevelMin" value="TRACE"/>

  </filter>

 </appender>

 

 <appender name="FILE" class="org.apache.log4j.FileAppender">

  <param name="File" value="C:/log4j1.log"/>

  <layout class="org.apache.log4j.PatternLayout">

   <param name="ConversionPattern"

    value="%d - %c -%-4r [%t] %-5p %x - %m%n" />

  </layout>

 </appender> 

 

 <appender name="DATABASE" class="org.apache.log4j.jdbc.JDBCAppender">

  <param name="URL" value="jdbc:oracle:thin:@192.168.0.59:1521:oanet"/>

  <param name="driver" value="oracle.jdbc.driver.OracleDriver"/>

  <param name="user" value="hdczoa"/>

  <param name="password" value="system"/>   

  <layout class="org.apache.log4j.PatternLayout">

   <param name="ConversionPattern"

    value="INSERT INTO hdczoa.LOG4J(stamp,thread, info_level,class,message) VALUES ('%d', '%t', '%p', '%c', %m)" />

  </layout>

 </appender>

 

 <!-- 發郵件（只有ERROR時纔會發送！） -->

 <appender name="MAIL"

  class="org.apache.log4j.net.SMTPAppender">

  <param name="threshold" value="debug" />

  <!-- 日誌的錯誤級別

   <param name="threshold" value="fatal"/>

  -->

  <!-- 緩存文件大小，日誌達到512K時發送Email -->

  <param name="BufferSize" value="512" /><!-- 單位K -->

  <param name="From" value="[email protected]" />

  <param name="SMTPHost" value="smtp.163.com" />

  <param name="Subject" value="juyee-log4jMessage" />

  <param name="To" value="[email protected]" />

  <param name="SMTPUsername" value="test" />

  <param name="SMTPPassword" value="test" />

  <layout class="org.apache.log4j.PatternLayout">

   <param name="ConversionPattern"

    value="%-d{yyyy-MM-dd HH:mm:ss.SSS} [%p]-[%c] %m%n" />

  </layout>

 </appender>

 

 <appender name="ASYNC" class="org.apache.log4j.AsyncAppender">

  <param name="BufferSize" value="256" />

  <appender-ref ref="DATABASE" />

 </appender>

 

 <!--通過<logger></logger>的定義可以將各個包中的類日誌輸出到不同的日誌文件中-->

 <logger name="com.litt2.log4j" additivity="false">  

        <level value="WARN" />  

        <appender-ref ref="CONSOLE" />  

    </logger>

 

 <!--通過<category></category>的定義可以將各個包中的類日誌輸出到不同的日誌文件中-->

 <category name="com.litt3">  

    <level value="DEBUG" /> 

       <appender-ref ref="CONSOLE" />

       <appender-ref ref="MAIL" />

  </category>

 

 <root>

  <priority value="debug" />

  <appender-ref ref="CONSOLE" />

  <appender-ref ref="FILE" />

 </root>

 

 

</log4j:configuration>