【javaWeb第四天】-Web资源访问概述

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本文介绍了如何在Tomcat服务器中部署Web应用，包括通过放置在webapps文件夹、使用虚拟主机映射以及通过配置context.xml文件的方式。此外还讲解了如何设置应用的默认首页及配置热更新。

netstat - ano查看端口占用情况

Web应用供外界访问方法
1.放在tomcat的webapp文件夹中。
2.虚拟映像
tomcat提供5种方法。
http://localhost:8080/docs/config/context.html

Context elements may be explicitly defined:

In the $CATALINA_BASE/conf/context.xml file: the Context element information will be loaded by all webapps.
In the $CATALINA_BASE/conf/[enginename]/[hostname]/context.xml.default file: the Context element information will be loaded by all webapps of that host.
In individual files (with a ".xml" extension) in the $CATALINA_BASE/conf/[enginename]/[hostname]/ directory. The name of the file (less the .xml extension) will be used as the context path. Multi-level context paths may be defined using #, e.g. foo#bar.xml for a context path of /foo/bar. The default web application may be defined by using a file called ROOT.xml.
Only if a context file does not exist for the application in the $CATALINA_BASE/conf/[enginename]/[hostname]/, in an individual file at /META-INF/context.xml inside the application files. If the web application is packaged as a WAR then /META-INF/context.xml will be copied to $CATALINA_BASE/conf/[enginename]/[hostname]/ and renamed to match the application's context path. Once this file exists, it will not be replaced if a new WAR with a newer/META-INF/context.xml is placed in the host's appBase.
Inside a Host element in the main conf/server.xml.

使用第四种
若Tomcat 和Web应用不在同一个盘中，可在 tomcat的conf/Catalina/localhost目录中加一个XML文件，文件名为虚拟映像名，如zpy.xml，内容为<Context docBase="F:\web文件名"/>，服务器会自动加载该应用。

在项目的Web-inf目录中可配置首页，输入项目名即可访问（http://localhost:8080/Test/）

<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

reloadable 设置为true.改过之后不需要重新发布，服务器会自动更新。在实际开发中最好不要配制，因为一但改动就会重新加载，应用较大时一旦连续加载会挂掉。