Cookie实现记住密码代码

 

 jsp页面

<%--
  Created by IntelliJ IDEA.
  User: 60590
  Date: 2019/11/28
  Time: 14:10
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
    <base href=<%= request.getContextPath()%>/>
</head>

<body>
<%   String value="";
    String value1="";
    String check="";
//读取Cookie的内容
    Cookie[] cookies = request.getCookies();
    if (cookies!=null){
        for (int i = 0; i <cookies.length ; i++) {
            if ("uname".equals(cookies[i].getName())){
                value = cookies[i].getValue();
                //只要进入了if，说明记录了账号和密码
                check="checked";
            }
            if ("pwd".equals(cookies[i].getName())){
                 value1 = cookies[i].getValue();

            }
        }
    }
%>
<form action="login" method="get">
<p>用户名:<input type="text" name="uname" value="<%=value%>"></p>
<p>密码:<input type="password" name="pwd" value="<%=value1%>"></p>
<%
    Object msg = request.getAttribute("msg");
%>
<p style="color: red"><%=msg==null?"":msg%></p>
<p><input type="checkbox" name="ck" value="yes" <%=check%>>记住密码</p>
<p><input type="submit" value="登陆"></p>
</form>
</body>
</html>

　　servlet代码package com.bjsxt.servlet;



package com.bjsxt.servlet;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @program: JavaEE
 * @description
 * @author: wuhao
 * @create: 2019-11-28 14:15
 **/
@WebServlet("/login")
public class LoginServlet extends HttpServlet {
    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //设置编码
        req.setCharacterEncoding("utf-8");
        resp.setContentType("text/html;charset=UTF-8");

        //获取请求数据
        String uname = req.getParameter("uname");
        String pwd = req.getParameter("pwd");
        String ck = req.getParameter("ck");
        //处理请求(理应掉业务逻辑层)
        boolean flag = false;
        if ("张三".equals(uname) && "123".equals(pwd)) {
            flag = true;
        }
        if (flag) {
            // 判断是否记住密码
            if ("yes".equals(ck)) {
                //记录账号密码
                Cookie cookie = new Cookie("uname", uname);
                Cookie cookie1 = new Cookie("pwd", pwd);
                //设置时间
                cookie.setMaxAge(3600 * 24 * 3);
                cookie1.setMaxAge(3600 * 24 * 3);
                //设置路径
                cookie.setPath("/day14/login.jsp");
                cookie1.setPath("/day14/login.jsp");
                //放入响应头中
                resp.addCookie(cookie);
                resp.addCookie(cookie1);

            }
                req.getRequestDispatcher("success.jsp").forward(req, resp);
        } else {
           // resp.sendRedirect("login.jsp");
            req.setAttribute("msg", "账号或密码不正确");
            req.getRequestDispatcher("login.jsp").forward(req,resp );

        }


    }
}








            

            
posted @ 
2019-11-28 22:14 
wu110111‬ 
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