Struts2: method attribute in button doesn't work

Answer 1

Set

<constant name="struts.enable.DynamicMethodInvocation" value="false" />

to

<constant name="struts.enable.DynamicMethodInvocation" value="true" />

Another way is to define multiple mappings for the same Action, like

in JSP:

<s:submit value="Search"  action="employeeSearchAction" />
<s:submit value="Add New" action="employeeAddNewAction"/>

in Struts.xml

<action name="employeeSearchAction" class="example.EmployeeAction" method="doSearch">
       <result>/example/search.jsp</result>
</action>
<action name="employeeAddNewAction" class="example.EmployeeAction" method="doAddNew">
       <result>/example/add.jsp</result>
</action>

A third way is to use Wildcard Mappings.

P.S: If you go for the second one, I'll suggest, as a best practice, to use one Action for every logical action you have to perform...

If you have common data loaded / managed by both your actions, "search" and "addNew", then you can define a employeeBaseAction, extended by both employeeSearchAction and employeeAddNewAction.

---

EDIT

It's 2014 now, and DMI usage is unanimously discouraged (today more than ever), other than pretty useless, so I strongly suggest you to use solution n.2.