小程序之统计网页访问人数

public class AServlet extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {//1 获得Application域中存放的统计数字Integer count = (Integer) getServletContext().getAttribute("count");//2 判断是否获得到统计数字if(count == null){//没获得到=> 将数字初始化为1count = 1;}else{//获得到了=> 将数字加1count += 1;}//3 输出,放回到Application域中response.getWriter().write("you are the "+ count+" vistors");getServletContext().setAttribute("count",count);}}