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There is no Action mapped for namespace / and action name "yourActionName". - [u

struts 
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问题描述： 
There is no Action mapped for namespace / and action name "yourActionName". - [unknown location]
    com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:178)
    org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:61)
   ...


解决办法：

Try this...in your struts.xml file, add a namespace to the default package like so: 
<package name="default" extends="struts-default" namespace="/">


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