here is no Action mapped for namespace [/user] and action name [user!add] associated with context pa
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Struts2中DMI(动态方法调用)的一些问题
好947
里面并没有excute()方法，这时大家给以这样配置<action name="helloword" class="struts.IndexAction" method="add">就可以返回IndexAction类中add方法的值，
但是这种方法不推荐！推荐的方法是动态调用，也就是DMI.
比如在地址栏中输入URL:http://localhost:8080/struts2/front/helloword!add
但是：如果这样输入的话，会报错（There is no Action mapped for namespace [/front] and action name [helloword!add()] associated with context path [/Struts2_10003].）
因为：struts2中默认不允许使用DMI
所以：需要在配置文件中打开： <constant name="struts.enable.DynamicMethodInvocation" value="true"/>这样大家在地址栏动态输入就可以得到预期的页面
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