tomcat——context.xml

本机tomcat位置：D:\tomcat7\apache-tomcat-7.0.61

---

context.xml

位置：D:\tomcat7\apache-tomcat-7.0.61\conf

每个Web应用程序将加载此文件的内容。

tomcat服务器会定时去扫描这个文件。一旦发现文件被修改（时间戳改变了），就会自动重新加载这个文件，而不需要重启服务器。

<?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>

    <!-- 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>

<WatchedResource>：指定被监视的资源，此元素可定义多个。如果WEB-INF/web.xml内容改变了，则自动重新加载改应用。

---

context.xml的三个作用范围

1. tomcat server级别：

在/conf/context.xml里配置

2. Host级别：

在/conf/Catalina/${hostName}里添加context.xml，继而进行配置

3. web app 级别：

在/conf/Catalina/${hostName}里添加${webAppName}.xml，继而进行配置

---

参考文档：

Tomcat中context.xml的配置

Tomcat的context.xml说明、Context标签讲解