使用struts2.3进行动态方法调用时出现:

There is no Action mapped for namespace [/user] and action name [user!add] associated with context path错误,原因是

(1)DMI可能导致安全问题

(2)DMI与通配符方法功能有重叠,因此该版本Struts2默认关闭DMI,需要在struts.xml中加一句

<constant name="struts.enable.DynamicMethodInvocation" value="true" /> 来打开动态方法调用。动态方法调用官方推荐的做法是,使用通配符的形式。不要使用actionName!methodName的方式。

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