当我们使用maven编译一个项目的时候，启动tomcat服务器，然后等待程序自动跑起来后的默认的跳转页面是到项目的web.xml配置文件里面去查找
<welcome-file-list><welcome-file>index.jsp</welcome-file><welcome-file>default.jsp</welcome-file><welcome-file>index.html</welcome-file></welcome-file-list>通过上面的标签便可以看出页面跳转时首先显示的是index.jsp然后是default.jsp最后是index.html。
我们还可以配置其他的一些过滤器：
<filter><filter-name>struts-prepare</filter-name><filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareFilter</filter-class><init-param><param-name>config</param-name><param-value>struts-default.xml,struts-plugin.xml,config/struts/struts.xml</param-value></init-param>
</filter><filter><filter-name>encodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>utf-8</param-value></init-param><init-param><param-name>forceEncoding</param-name><param-value>true</param-value></init-param>
</filter><filter-mapping>
<span style="white-space:pre"> </span><filter-name>encodingFilter</filter-name>
<span style="white-space:pre"> </span><url-pattern>/*</url-pattern>
<span style="white-space:pre"> </span><dispatcher>REQUEST</dispatcher>
<span style="white-space:pre"> </span><dispatcher>FORWARD</dispatcher>
</filter-mapping>
<pre name="code" class="html"><filter-mapping><filter-name>struts-prepare</filter-name><url-pattern>/*</url-pattern><dispatcher>REQUEST</dispatcher><dispatcher>FORWARD</dispatcher>
</filter-mapping>
)
)
