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HTTP404 There is no Action mapped for namespace / and action name login.

 
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Web项目采用SSH架构，偶尔报“There is no Action mapped for namespace / and action name login.”异常。

从字面上得信息来看，是找不到action的映射，出现这个错误是struts2报的错，主要有几方面原因：

1.访问的地址错误，这种情况没什么可说的，仔细检查一下就行

2.命名空间错误(namespace)，如果action有命名空间的话，访问的时候需要拼接上，如namespace='user'、<action name="login">，访问应该用：\user\login.action

3.struts.xml文件未被读取，有可能是文件名不对，也有可能是文件的引用地址不对

4.MyEclipse的bug，这个问题是最恶心的，如果以上问题都不是，那么最有可能的就是这个错了。这个错是怎么回事呢，主要是MyEclipse在发布到Tomcat上得时候没发布struts.xml，手动将struts.xml粘贴到项目的classes文件夹里就好了 - -!


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