简单的cookie，却无法刷新的有关问题-Java教程-爱易网页

简单的cookie，却无法刷新的有关问题

日期：2014-05-19　浏览次数：20596 次

简单的cookie，却无法刷新的问题~
以下这两段cookie代码，是照着书上做的（而且是两本不同的书），就是最简单的跟踪访问次数的那种，但都没办法刷新数值，一直都显示初始值，难道是浏览器的问题？请教高手~
第一段代码：[/size]

Java code


import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class cookie extends HttpServlet {


    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        Cookie cookie =null;
        Cookie[] cookies = request.getCookies();

        if(cookies!=null){
            for(int i =0;i<cookies.length;i++){
                if(cookies[i].getName().equals("VisitTimes")){
                    String v = cookies[i].getValue();
                    System.out.println(cookies[i].getValue());
                    int value = Integer.parseInt(v)+1;
                    cookies[i].setValue(Integer.toString(value));
                    cookie=cookies[i];
                    System.out.println(cookies[i].getValue());
                }
            }
        }

            
        if(cookie==null){
            System.out.print("new ");
            int maxAge = 10000;
            cookie = new Cookie("VisitTimes","1");
            cookie.setPath(request.getContextPath());
            cookie.setMaxAge(maxAge);
            response.addCookie(cookie);
        }
        

        response.setContentType("text/html;charset=gb2312");
        PrintWriter out = response.getWriter();
        out
                .println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
        out.println("<HTML>");
        out.println("  <HEAD><TITLE>跟踪会话</TITLE></HEAD>");
        out.println("  <BODY>");
        out.println("<h2>您好！</h2>");
        out.println("欢迎您第"+cookie.getValue()+"次访问<br>");
        out.println("  </BODY>");
        out.println("</HTML>");
    }

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

doGet(request,response);
    }

}

第二段代码

Java code

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class cookie2 extends HttpServlet {


    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        int count=1;
        Cookie cookie =null;
        Cookie[] cookies = request.getCookies();
        
        if(cookies==null||cookies.length==0){
            //System.out.print("new ");
            cookie = new Cookie("Visit","1");
            //cookie.setPath(request.getContextPath());
            cookie.setMaxAge(300);
            response.addCookie(cookie);
        }

        else{
            for(int i =0;i<cookies.length;i++){
                if(cookies[i].getName().

免责声明： 本文仅代表作者个人观点，与爱易网无关。其原创性以及文中陈述文字和内容未经本站证实，对本文以及其中全部或者部分内容、文字的真实性、完整性、及时性本站不作任何保证或承诺，请读者仅作参考，并请自行核实相关内容。

简单的cookie，却无法刷新的有关问题

相关资料更多>

推荐阅读更多>