Struts2访问servlet分享

一：访问或添加request/session/application属性
 

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}

 

二：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";
}

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;
       }
}