maven redeploy过程无法删除Tomcat旧项目的目录

Windows系统下，redeploy过程无法删除旧项目的目录

报错信息在$TOMCAT_HOME/logs下的catalina日志文件中，如下：

信息: Undeploying context [/web-loab]  
十月 11, 2014 3:52:26 下午 org.apache.catalina.startup.ExpandWar deleteDir  
严重: [D:\tomcat\apache-tomcat-7.0.56\webapps\web-loab\WEB-INF] could not be completely deleted. The presence of the remaining files may cause problems

大概是因为Tomcat还在使用这个目录，无法删除，必须修改$TOMCAT_HOME/conf/context.xml

<?xml version='1.0' encoding='utf-8'?>
<!--
  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.
-->
<!-- The contents of this file will be loaded for each web application -->
<Context antiJARLocking="true" antiResourceLocking="true">

    <!-- Default set of monitored resources -->
    <WatchedResource>WEB-INF/web.xml</WatchedResource>

    <!-- Uncomment this to disable session persistence across Tomcat restarts -->
    <!--
    <Manager pathname="" />
    -->

    <!-- Uncomment this to enable Comet connection tacking (provides events
         on session expiration as well as webapp lifecycle) -->
    <!--
    <Valve className="org.apache.catalina.valves.CometConnectionManagerValve" />
    -->

</Context>

也就是 在 context 标签上 添加 “antiJARLocking”， “antiResourceLocking” 属性，并都设置为 true，即可！

参考文章《开发过程使用Tomcat Maven插件持续快捷部》