Servlet统计访问网站次数

UseServlet.java

ServletContext context = getServletContext();
        Integer count = (Integer)context.getAttribute("counter");
        if(count==null){
            count=1;
            context.setAttribute("counter", count);
        }else {
            context.setAttribute("counter", count+1);
        }
        resp.setContentType("text/html");
        resp.setCharacterEncoding("utf-8");
        PrintWriter out = resp.getWriter();
        out.println("");
        out.println("");
        out.println("");
        out.println("");
        out.println("
");
        out.println("您是第 "+context.getAttribute("counter")+" 位访客！ ");
        out.println("
");
        out.println("");
        out.println("");

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