Struts2 DMI cannot run

When learning dynamic method calls, the written link is <a href = "User/user! List "> Add students </a>

However, when you click the link, the following error message is displayed:

There is no Action mapped for namespace [/user] and action name [user! Add] associated with context path [/struts2_050_actionmethod]

 

After checking the document, we can see that struts2 can choose enable and disable for DMI for two reasons: 1) DMI may cause security problems; 2) DMI and wildcard method functions overlap.

However, by default, DMI is enable.

After carefully reading my configuration file, I found that when I copied other files, I copied such a sentence.

<Constant name = "struts. Enable. dynamicmethodinvocation" value = "false"/>

In this case, DMI is set to disable.

 

Delete this sentence, or change the value to "true" to get the expected result.

Add in struts. xml

<Constant name = "struts. Enable. dynamicmethodinvocation" value = "true"/>
Enable dynamic method call.
We recommend that you use wildcards to call dynamic methods. Do not use actionname! Methodname
.

 

Dynamic method calls in versions earlier than struts2 are enabled by default, but 2.3.15 is disabled by default.

Struts2 DMI cannot run