struts-config文件的action标签的scope属性是什么意思？

Question

I'm working on a Struts application.

In order to edit the struts-config.xml file, I think I have to add an attribute - scope , in the action tag. I'm not sure about its meaning, or its usage.

<action path="/WetsVpnSwapTraffic"
            type="com.kpn.bop.web.action.vpn.wets.WetsVpnSwapTraffic"
            scope="request"
            name="WetsVpnSwapTrafficForm"
            roles="bop_wetsvpn_migrate"
            validate="false">
        <forward name="success" path="/WetsVpnSwapTrafficValidate.do"/>
        <forward name="failure" path="/WetsVpnList.do"/>
</action>  

Can anyone explain me if I have to put this attribute?

Answer 1

The attribute scope is used to define the scope (life of the object, the form) of the object action form that used in that action configuration.

There's also different scopes, page , request , session , application . That's all from servlet specs. If you specify the scope of request that you want the form object is available during servlet http request.

You can check this reference to determine how to use scopes.

There's also link to action mapping configuration .

Answer 2

它确定ActionForm是否在请求或会话中。