Struts2 获取参数的操作方式

以下方式能拿到上下文中的值:

import javax.servlet.http.HttpServletRequest;import org.apache.struts2.ServletActionContext; HttpServletRequest request=(HttpServletRequest)ServletActionContext.getRequest(); request.getSession().getAttribute("userId").toString() 

以下两种方式能拿到struts2前台传递到后台的参数值:String id = this.getRequest().getParameter("id");String ids = this.httpServletRequest.getParameter("id");