HTTP Status 404 - There is no Action mapped for namespace / and action name first.

type Status report

message There is no Action mapped for namespace / and action name first.

description The requested resource is not available.

Apache Tomcat/6.0.37

解决：

1.struts.xml文件名出现出错：如：sturts.xml拼写错误，struts2.xml理解错误；

2.struts.xml文件放置位置出错，应该放在src目录下；

3.struts.xml文件内容出错

Struts2-tomcat报错：There is no Action mapped for namespace / and action

原文：http://www.cnblogs.com/Hugooscar/p/6113047.html