| An abstract Action that dispatches to the subclass
mapped execute method. This is useful in cases where an HTML
form has multiple submit buttons with the same name. The button name is
specified by the parameter property of the corresponding
ActionMapping. To configure the use of this action in your
struts-config.xml file, create an entry like this:
<action path="/test"
type="org.example.MyAction"
name="MyForm"
scope="request"
input="/test.jsp"
parameter="method"/>
which will use the value of the request parameter named "method" to locate
the corresponding key in ApplicationResources. For example, you might have
the following ApplicationResources.properties:
button.add=Add Record
button.delete=Delete Record
And your JSP would have the following format for submit buttons:
<html:form action="/test">
<html:submit property="method">
<bean:message key="button.add"/>
</html:submit>
<html:submit property="method">
<bean:message key="button.delete"/>
</html:submit>
</html:form>
Your subclass must implement both getKeyMethodMap and the methods defined
in the map. An example of such implementations are:
protected Map getKeyMethodMap() {
Map map = new HashMap();
map.put("button.add", "add");
map.put("button.delete", "delete");
return map;
}
public ActionForward add(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException {
// do add
return mapping.findForward("success");
}
public ActionForward delete(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException {
// do delete
return mapping.findForward("success");
}
Notes - If duplicate values exist for the keys
returned by getKeys, only the first one found will be returned. If no
corresponding key is found then an exception will be thrown. You can
override the method unspecified to provide a custom handler.
If the submit was cancelled (a html:cancel button was
pressed), the custom handler cancelled will be used instead.
| 