如何用cookie验证session

1、什么是状态管理，状态管理即对数据的管理，Cookie和session最大的区别是session将数据保存在服务器端，Cookie将数据保存在客户端；

2、public class CodeServlet extends HttpServlet{ @Overrideprotected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); response.setContentType("text/html;charset=utf-8"); PrintWriter out=response.getWriter();

3、 //添加cookie Cookie c=new Cookie(&孥恶膈茯quot;city",URLEncoder.encode烫喇霰嘴("合肥","utf-8")); response.addCookie(c); Cookie[] cookies=request.getCookies(); for(Cookie c2:cookies){ String value=c2.getValue(); out.print("name:"+c2.getName()+"value:"+URLDecoder.decode(value,"utf-8")); } out.close(); }}

4、public class Find觊皱筠桡CookieServlet extends HttpServlet{ @Overrideprotect髫潋啜缅ed void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); response.setContentType("text/html;charset=utf-8"); PrintWriter out=response.getWriter();

5、// Cookie c1=new Cookie("city","Hefei");// response.addCookie(c1); //查找cookie Cookie[] cookies=request.getCookies(); if (cookies!=null) {for(Cookie c:cookies){out.print("Cookie名："+c.getName()+";Cookie值："+c.getValue()+"<br>");}}}

6、 if(cookies==null){ out.print("<h1>没有找到相关的cookie信息</h1>"); } out.close(); }