There is no Action mapped for namespace / and action name login. - [unknown location]
（自己在浏览器中，直接进入项目的根目录，即 http://localhost:8080/ssh/ 时便报错，web.xml文件已经配置了 欢迎页面
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
并且 filter-mapping设置为 所有的url
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
其实问题是，自己无意中，将 index.jsp 文件 拖到了别的路径（应该在WebRoot 的根目录下）
网上有的人，将struts.xml 文件名 拼写错，也报该错误。
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