全局对象统计点击次数

    ServletContext servletContext = request.getServletContext();
    Object count = servletContext.getAttribute("count");
    if (count==null){
         servletContext.setAttribute("count",1);
    }
    else {
        int i = Integer.parseInt(count.toString());
        servletContext.setAttribute("count",++i);
    }

    response.getWriter().println(count);



}