struts的路径问题，高手帮忙

web.xml文件

<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
"http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">

<web-app>


<!-- Standard Action Servlet Configuration (with debugging) -->
<servlet>
<servlet-name>action</servlet-name>
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
<init-param>
<param-name>application</param-name>
<param-value>resources.application</param-value>
</init-param>
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>2</param-value>
</init-param>
<init-param>
<param-name>detail</param-name>
<param-value>2</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>


<!-- Action Servlet Mapping -->
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>


<!-- The Usual Welcome File List -->
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>




</web-app>

struts-config.xml文件

<?xml version="1.0" encoding="ISO-8859-1" ?>

<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.0//EN"
"http://jakarta.apache.org/struts/dtds/struts-config_1_0.dtd">

<struts-config>
<!-- ======================================== data-sources definitions -->

<!-- ======================================== Form Bean Definitions -->

<form-beans>

<form-bean
name="addForm"
type="app.addform"/>

</form-beans>


<!-- =================================== Global Forward Definitions -->

<global-forwards>


</global-forwards>


<!-- =================================== Action Mapping Definitions -->

<action-mappings>
<action path="/add.do" type="app.addaction" name="addForm">
<forward name="success" path="/add.jsp"/>
<forward name="fail" path="/error.jsp"/>
</action>

<action path="/delete.do" type="app.deleteaction" >
<forward name="success" path="/show.do"/>
<forward name="fail" path="/error.jsp"/>
</action>

<action path="/show.do" type="app.showaction" >
<forward name="success" path="/index.jsp"/>
<forward name="fail" path="/error.jsp"/>
</action>
</action-mappings>

</struts-config>
-----------------
哪位大哥帮忙看一下有什么问题
程序有时候可以运行 有时候又运行不了 提示action的路径无效

<global-forwards>


</global-forwards>
在这个中定义一下路径

为什么要在<global-forwards>中定义路径？

我再顶

应该是调用“/delete.do”成功的时候不好用，
把path的“.do”都删掉。