如何告诉struts2约定插件扫描包的所有子包。我试过了

<constant name="struts.convention.action.suffix" value="Controller" /> 
<constant name="struts.convention.package.locators.basePackage" value="fi.fpf.mvc" />

还有这个

<constant name="struts.convention.action.suffix" value="Controller" /> 
<constant name="struts.convention.package.locators.basePackage" value="fi.fpf.mvc.*" />

但它们不起作用。我的行动以 "Controller" 后缀。有人知道怎么做吗？
这是我的 struts.xml :

<struts>

    <constant name="struts.convention.exclude.parentClassLoader" value="true"/>
    <constant name="struts.convention.action.fileProtocols" value="jar,vfs,vfsfile,vfszip"/>
<constant name="struts.convention.action.suffix" value="Controller" /> 
    <constant name="struts.convention.package.locators.basePackage" value="fi.fpf.mvc" />

    <package name="fpf-default" extends="struts-default">
        <result-types>
            <result-type name="tiles" class="org.apache.struts2.views.tiles.TilesResult" />
        </result-types>
    </package>
</struts>

还有一个动作：

@Action("indexController")
public class IndexController extends ActionSupport{

    private static final long serialVersionUID = -2613425890762568273L;

    @Action(value="loadIndex", results={
            @Result(name="indexView", location = "indexView", type="tiles")
    })
    public String loadIndex() {
        return "indexView";     
    }    
}