如何在struts-config中的正向标记中添加自定义元素

Question

I am new to struts 1.xi have used struts forward tag in my application like this

<struts-config>

<action-mappings>

    <action
        path="/Welcome"
        type="org.apache.struts.actions.ForwardAction"
        parameter="/pages/Welcome.jsp"/>

</action-mappings>

but in an application i am watching this approach

<action path="/getUserGrp" type="org.apache.struts.actions.ForwardAction"
        className="com.mj.metal.mapping.AutoActionMapping" parameter="/getUserGrp.screen">
        <set-property property="requireSignIn" value="true" />
        <forward name="requireSignIn" path="/getSignIn.do" />
        <forward name="failure" path="/errorHome.screen" />
        <forward name="invalidAccess" path="/underPrivileged.screen" />
    </action>

why className is used with forward action? and parameter is generally a method name like mapping dispatch. Can anyone explain the meaning of this tag?

Answer 1

The clasName attribute is optional and is used if you've created your own custom ActionMapping class.

The set-property element is used to initialize the properties in your custom ActionMapping class.

Read this for more info