Question

我使用Eclipse WTP Tomcat创建了一个名为“test”的Dynamic Web Projects，Eclipse版本是Java EE Kepler Service Release 2，Tomcat版本是7.0.53，Servlet 3.0，Win 8.1 x86，jdk 1.6.0_45，但之后几次尝试，我发现在匹配以下所有条件时会出现问题：

Webapp（网络上下文）不在＆lt; CATALINA_HOME＆gt; / webapps（这是appBase的默认值）中，并且：
通过编写＆lt; Context＆gt;来配置Webapp。＆lt; CATALINA_HOME＆gt; \ conf \ server.xml中＆lt; Host＆gt;下的元素元件。

以下是＆lt; CATALINA_HOME＆gt; \ conf \ server.xml：

   <Host appBase="webapps" autoDeploy="true" name="localhost" unpackWARs="true">

    <!-- SingleSignOn valve, share authentication between web applications
         Documentation at: /docs/config/valve.html -->
    <!--
    <Valve className="org.apache.catalina.authenticator.SingleSignOn" />
    -->

    <!-- Access log processes all example.
         Documentation at: /docs/config/valve.html
         Note: The pattern used is equivalent to using pattern="common" -->
    <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" pattern="%h %l %u %t &quot;%r&quot; %s %b" prefix="localhost_access_log." suffix=".txt"/>
    <Context docBase="D:/tmpdev/apache-tomcat-7.0.53/wtpwebapps/test" path="/test" reloadable="true"/>
  </Host>

以下是“test”的目录结构：

test
├─META-INF
│      MANIFEST.MF
│
└─WEB-INF
    │  web.xml
    │
    ├─classes
    │  └─test
    │          HelloServlet.class
    │          MyFilter1.class
    │          MyFilter2.class
    │          MyHttpSessionListener.class
    │          MyServletContextListener.class
    │
    └─lib

虽然WEB-INF / web.xml是＆lt; WatchedResource＆gt;在＆lt; CATALINA_HOME＆gt; \ conf \ context.xml中默认情况下，我尝试添加＆lt; WatchedResource＆gt;以下每种格式的元素仍然不起作用：

<WatchedResource>WEB-INF/web.xml</WatchedResource>
<WatchedResource>WEB-INF\web.xml</WatchedResource>
<WatchedResource>D:/tmpdev/apache-tomcat-7.0.53/wtpwebapps/test/WEB-INF/web.xml</WatchedResource>
<WatchedResource>D:\tmpdev\apache-tomcat-7.0.53\wtpwebapps\test\WEB-INF\web.xml</WatchedResource>

HERE是其他有效的配置方式：

使用单独的文件＆lt; CATALINA_HOME＆gt; \ conf \ Catalina \ localhost \ test.xml配置上下文，或者：
在没有任何其他配置的情况下将“test”移动到＆lt; CATALINA_HOME＆gt; \ webapps，或者：
检查Eclipse WTP中的“服务器选项”中的“未发布服务模块”

Answer 1

<WatchedResoucre>仅适用于从server.xml部署上下文时未使用的自动部署功能。

Answer 2

重新加载仅在我更新server.xml文件后才起作用!!!

通过设置autoDeploy = true

<br>
The output from the logs then showed a "Reloading context" 

08-May-2018 20:58:56.654 INFO [ContainerBackgroundProcessor[StandardEngine[Catalina]]] org.apache.catalina.startup.HostConfig.reload <b>Reloading context </b>[/prototype_maven]
08-May-2018 20:58:56.654 INFO [ContainerBackgroundProcessor[StandardEngine[Catalina]]] org.apache.catalina.core.StandardContext.reload Reloading Context with name [/prototype_maven] has started
08-May-2018 20:58:58.619 INFO [ContainerBackgroundProcessor[StandardEngine[Catalina]]] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
08-May-2018 20:58:58.629 INFO [ContainerBackgroundProcessor[StandardEngine[Catalina]]] org.apache.catalina.core.StandardContext.reload Reloading Context with name [/prototype_maven] is completed

为什么更改WEB-INF / web.xml不会导致tomcat重新加载上下文？

2 个答案: