一、实例化application

public class ServletA extends HttpServlet {

public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

ServletContext application = this.getServletContext();  // //GenericServlet提供的方法，得到application

// 以 javax.servlet-api 2.5为例，request为请求实例：

//ServletContext application = request.getSession().getServletContext();

application.setAttribute("name",name);

application.getAttribute("name");

}

}

 

二、实例化session

public class ServletA extends HttpServlet {

public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

HttpSession session = request.getSession(); //实例化session

}

}