Servlet中使用HttpSession实现网页被访问的次数

首先我们需要通过使用HttpSession session = request.getSession();获取HttpSession对象public void doPost(HttpServletRequest request,HttpServletResponse response)
throws ServletException, java.io.IOException {
response.setContentType("text/html;charset=UTF-8");//设置响应的字符编码为UTF-8,以保证中文字符的正确显示
HttpSession session = request.getSession();
String heading;
Integer accessCount =(Integer)session.getAttribute("accessCount");
if(accessCount == null) {
accessCount = new Integer(0);
heading = "Welcom,You are first time to visit!";
}
else {
heading = "Welcome Healing_Hands";
accessCount = new Integer(accessCount.intValue()+1);
}
session.setAttribute("accessCount",accessCount);
PrintWriter out = response.getWriter();
out.println("The title:" + heading);
out.println("Access count: " + accessCount);
out.flush();
out.close();
}