1<?xml version="1.0" encoding="UTF-8"?>
2<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
3    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
 5    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
 6    <filter>
7        <filter-name>webwork</filter-name>
8        <filter-class>
9            com.opensymphony.webwork.dispatcher.FilterDispatcher
10        </filter-class>
11    </filter>
12
13    <filter-mapping>
14        <filter-name>webwork</filter-name>
15        <url-pattern>*.action</url-pattern>
16    </filter-mapping>
17</web-app>

再url中输入的链接是*.action后缀名结尾，例如：http://localhost:8080/login/login.action如果把<url-patterm>*.action</url-pattern>改成<url-patterm>*.jspa</url-pattern>再没有配置webwork.properties的情况下输入http://localhost:8080/login/login*.jspa会报错，找不到相关的文件404错误，解决办法：配置webwork.properties文件，加入webwork.action.extension=jspa就可以解决自己想用的url后缀名http://localhost:8080/login/login*.jspa。

原文地址