log4j如何配置到spring中

本篇主要写一个完整的配置，只是一个大概的流程，至于配置文件的详细信息很多我也在学习，大家想了解的话可以百度一下，通过下面的流程配置好后，就能通过Logger/Log来以不同的方式记录log信息了。

1.首先在web.xml中添加如下信息。

log4j.properties也可以换成xml文件配置，只要指定相应的路径就行了。

 <listener>
         <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
  </listener>
<context-param>
     <param-name>log4jConfigLocation</param-name>
     <param-value>/log4j.properties</param-value>
</context-param>

2.log4j.properties

具体如何配置，可以baidu一下。

#  $Id: Action.java 502296 2007-02-01 17:33:39Z niallp $
# 
#  Licensed to the Apache Software Foundation (ASF) under one
#  or more contributor license agreements.  See the NOTICE file
#  distributed with this work for additional information
#  regarding copyright ownership.  The ASF licenses this file
#  to you under the Apache License, Version 2.0 (the
#  "License"); you may not use this file except in compliance
#  with the License.  You may obtain a copy of the License at
# 
#   http://www.apache.org/licenses/LICENSE-2.0
# 
#  Unless required by applicable law or agreed to in writing,
#  software distributed under the License is distributed on an
#  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
#  KIND, either express or implied.  See the License for the
#  specific language governing permissions and limitations
#  under the License.

log4j.rootLogger = WARN, stdout,R

log4j.appender.stdout = org.apache.log4j.ConsoleAppender
#log4j.appender.stdout.Threshold = WARN
#log4j.appender.stdout.Target   = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = %d{ISO8601} %-5p [%F:%L] : %m%n

log4j.appender.R = org.apache.log4j.FileAppender
log4j.appender.R.File = D:/apache-tomcat-6.0.35/logs/qc.log
#log4j.appender.stdout.Threshold = WARN
#log4j.appender.stdout.Target   = System.out
log4j.appender.R.layout = org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern = %d{ISO8601} %-5p [%F:%L] : %m%n

#log4j.logger.Time = ERROR,T
#log4j.appender.T = org.apache.log4j.FileAppender
#log4j.appender.T.File = D:/apache-tomcat-7.0.29/logs/qc.txt
##log4j.appender.stdout.Threshold = WARN
##log4j.appender.stdout.Target   = System.out
#log4j.appender.T.layout = org.apache.log4j.PatternLayout
#log4j.appender.T.layout.ConversionPattern = %-5p [%F:%L] : %m%n

3.log4j.xml
   控制台输出

<?xml version="1.0" encoding="GBK" ?>  
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">  
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">    
      <!-- 输出日志到控制台  ConsoleAppender --> 
        <appender name="console" 
          class="org.apache.log4j.ConsoleAppender">
          <param name="Threshold" value="info"></param>
          <layout class="org.apache.log4j.TTCCLayout">
              <param name="ConversionPattern" value="TTCCLayout"></param>
          </layout>
      </appender>

     <root>     
        <priority value="debug" />     
        <appender-ref ref="console" />  
     </root>        

</log4j:configuration> 

如果是使用log4j.properties文件的话，在启动tomcat时会有下面的WARN信息：

log4j:WARN No appenders could be found for logger (org.springframework.web.context.ContextLoader).
log4j:WARN Please initialize the log4j system properly.

如果想去掉这些信息的话，可以将文件挪到/WEB-INF/src下面。具体为什么能够去掉，我也不知道。望知道的告诉Me一声，谢谢。