action：

public String scope() throws Exception{
      ActionContext ctx = ActionContext.getContext();    ctx.getApplication().put("app", "应用范围");//往ServletContext里放入app    ctx.getSession().put("ses", "session范围");//往session里放入ses    ctx.put("req", "request范围");//往request里放入req    return "scope"; }

jsp：

     ${applicationScope.app} 
     ${sessionScope.ses}
     ${requestScope.req}
  

 

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获取HttpServletRequest / HttpSession / ServletContext / HttpServletResponse对象

方法一，通过ServletActionContext.类直接获取：

 

public String rsa() throws Exception{
        HttpServletRequest request = ServletActionContext.getRequest();     ServletContext servletContext = ServletActionContext.getServletContext();     request.getSession()         HttpServletResponse response = ServletActionContext.getResponse(); return "scope"; }

 

方法二，实现指定接口，由struts框架运行时注入：

public class HelloWorldAction implements ServletRequestAware, ServletResponseAware, ServletContextAware{
    private HttpServletRequest request; private ServletContext servletContext; private HttpServletResponse response; public void setServletRequest(HttpServletRequest req) {
    this.request=req;     } public void setServletResponse(HttpServletResponse res) {
    this.response=res;     } public void setServletContext(ServletContext ser) {
    this.servletContext=ser;     } }