如何从servlet调用泛型Portlet方法?

我已经创建了一个portlet,并且能够在servlet中执行所有业务逻辑。我需要在servlet中获取救生筏登录用户的详细信息。所以我创建了一个类,它将扩展 GenericPortlet 现在我的问题是如何调用执行GenericPorlet未实现方法所需的类。我的代码如下:,

public class ActionProcess extends GenericPortlet {

    public void init() throws PortletException{
        super.init();
    }

    public void doView(RenderRequest request, RenderResponse response) throws PortletException, IOException {
             User user = (User) request.getAttribute(WebKeys.USER);
             ThemeDisplay td  =(ThemeDisplay)request.getAttribute(WebKeys.THEME_DISPLAY);
             User urs = td.getUser();
             System.out.println("doView "+ urs);
             System.out.println("doView "+ user);
    }
}

现在我需要打电话给 doView() 并将值返回给servlet。我的servlet代码是如何做到的。

@WebServlet("/demoClass")
public class demoClass extends HttpServlet {
        private static final long serialVersionUID = 1L;

    public demoClass() {
        super();
        // TODO Auto-generated constructor stub
    }
        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
                // TODO Auto-generated method stub
                 doPost(request, response); // 
        }
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//Here I am performing the business logic....
//How do I call the ActionProcess class here, I need to get the User name which is return by diView() method
}
}

有什么建议吗?