Struts2的Action中如何操作作用域对象

得到作用域对象有三种方法，这里用代码来解释：

 package com.cy.action;

 import javax.servlet.ServletContext;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

 import org.apache.struts2.interceptor.ServletRequestAware;
 import org.apache.struts2.interceptor.ServletResponseAware;
 import org.apache.struts2.util.ServletContextAware;

 import com.opensymphony.xwork2.ActionSupport;

 public class BaseAction extends ActionSupport implements ServletRequestAware,ServletResponseAware,ServletContextAware {

     private static final long serialVersionUID = 1L;
     private ServletContext servletContext;
     private HttpServletRequest request;
     private HttpServletResponse response;

     @Override
     public void setServletContext(ServletContext arg0) {
         // TODO Auto-generated method stub
         this.servletContext=arg0;

     }

     @Override
     public void setServletResponse(HttpServletResponse arg0) {
         // TODO Auto-generated method stub
         this.response=arg0;

     }

     @Override
     public void setServletRequest(HttpServletRequest arg0) {
         // TODO Auto-generated method stub
         this.request=arg0;
     }

     public HttpServletRequest getRequest() {
         return request;
     }

     public void setRequest(HttpServletRequest request) {
         this.request = request;
     }

     public HttpServletResponse getResponse() {
         return response;
     }

     public void setResponse(HttpServletResponse response) {
         this.response = response;
     }

     public ServletContext getServletContext() {
         return servletContext;
     }

 }

 //--------------Struts2 操作作用域的3种方式-------------------
 //        //采用实现接口的方式，来获取作用域（最常用）
 //        getRequest().setAttribute(arg0, arg1)
 //        getRequest().getSession().setAttribute(arg0, arg1)
 //        getServletContext().setAttribute(arg0, arg1)
 //        

 //        //采用ActionContext对象来对作用域进行操作
 //        ActionContext ac = ActionContext.getContext();
 //        ac.put(key, value);//直接对request进行操作。
 //        ac.getSession().put(key, value)//向Session中设值
 //        ac.getApplication().put(key, value)//向ServletContext中设值

 //        //采用ServletActionContext对象来对作用域进行操作
 //        HttpServletRequest request = ServletActionContext.getRequest();
 //        HttpServletResponse response = ServletActionContext.getResponse();
 //        ServletContext sevletContext = ServletActionContext.getServletContext();
 //    

随着技术不断的更新，这里的仅供参考！（Struts在公司里已经不再是主流了！）