<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Cookie使用的简单例子/title> </head> <body
> <% Cookie[] cook = request.getCookies();//获取本地所有的Cookie对象 String[] userMessage = new String[] { "", "" }; //用户存储从cookie中获取的用户名和密码 if (cook != null) { for (int i = 0; i < cook.length; i++) { if (cook[i].getName().equals("userInfo")) { userMessage = cook[i].getValue().split("#");//通过分割split获取用户名和密码. } } } %> <p>本页面仅用于测试,只有输入用户名为张运涛,密码为123456时,提示正常登录,否则提示用户名密码错误;正常登入后会把用户名与密码保存在cookie中便于用户登入</p> <form action="check.jsp" method="post"> <table> <tr> <td>用户名:</td> <td><input name="userName" type="text" value="<%=userMessage[0]%>"></td> </tr> <tr> <td>密码</td> <td><input type="password" name="password" value="<%=userMessage[1]%>"></td> </tr> <tr> <td> </td> </tr> <tr> <td colspan="2" align="center"><input type="submit" value="提交"> <input type="reset" value="重置"></td> </tr> </table> </form> </body> </html>
check.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <% request.setCharacterEncoding("utf-8"); String userName = request.getParameter("userName"); String password = request.getParameter("password"); if (userName.equals("张运涛") && password.equals("123456")) { Cookie mycook=new Cookie("userInfo",userName+"#"+password); //设置cookie对象 mycook.setMaxAge(60*60*20*365); //设置cookie有效期 response.addCookie(mycook);//把cookie对象发送到客户端进行存储 %> <script> alert("登录成功!"); window.location.href = "login.jsp"; </script> <% } else { %> <script> alert("登录失败,用户名或者密码错误"); window.location.href = "login.jsp"; </script> <% } %> </body> </html>
效果图
