【javaWeb第四天】-Web资源访问概述

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。