Struts2 在Action中获取request、session、servletContext的三种方法

首页message.jsp:

<body>
   	 ${requestScope.req }<br/>
   	 ${applicationScope.app }<br/>
   	 ${sessionScope.ses }<br/>
  </body>


（1）使用ActionContext获取


public String sayHello(){
		ActionContext cxt=ActionContext.getContext();
		cxt.getApplication().put("app", "application范围");
		cxt.getSession().put("ses", "session范围");
		cxt.put("req", "request范围");
		return "message";
	}



（2）使用ServletActionContext获取

public String sayTwo(){
		HttpServletRequest request=ServletActionContext.getRequest();
		ServletContext cxt=ServletActionContext.getServletContext();
		request.setAttribute("req", "request请求范围");
		request.getSession().setAttribute("ses", "会话范围");
		cxt.setAttribute("app", "应用程序范围");
		return "message";
	}


（3）通过继承ServletRequestAware,ServletContextAware 并实现set方法获取

public class HelloAction implements ServletRequestAware,ServletContextAware{
	private HttpServletRequest request1;
	private ServletContext context1;

	public HelloAction(){}
	
	public String sayThree(){
		request1.setAttribute("req", "request请求范围111");
		request1.getSession().setAttribute("ses", "会话范围111");
		context1.setAttribute("app", "应用程序范围111");
		return "message";
	}
	@Override
	public void setServletRequest(HttpServletRequest arg0) {
		request1=arg0;
	}
	@Override
	public void setServletContext(ServletContext arg0) {
		context1=arg0;
	}	
}



posted @ 2015-10-10 16:09  Bodi  阅读(6282)  评论(0)  编辑  收藏  举报