log4j配置（XML配置方式）

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log4j.xml<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE log4j:configuration SYSTEM "log4j.dtd"><log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">      <!--==============================================-->      <!--                                              -->      <!--           rolling file Appender                      -->      <!--==============================================-->       <appender name="B1" class="org.apache.log4j.RollingFileAppender">            <param name="File" value="log.htm" />            <param name="Append" value="false" />            <layout class="org.apache.log4j.PatternLayout">                <param name="ConversionPattern" value="%d [%t] %p -%m%n" />             </layout>      </appender>      <!--==============================================-->      <!--                                              -->      <!--           console Appender                         -->      <!--==============================================-->      <appender name="A1" class="org.apache.log4j.ConsoleAppender">            <layout class="org.apache.log4j.PatternLayout">                <param name="ConversionPattern" value="%d [%t] %p - %m%n" />            </layout>      </appender>      <!-- define root-->      <root>            <level value="INFO" />            <appender-ref ref="A1" />            <appender-ref ref="B1" />      </root></log4j:configuration>
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