前言
Java实现登录时cookie记住密码,下次登录不用重新输入密码,自动记住密码进行登录
编写代码
首先写一个页面登录表单,还有它对应的js
<%--Created by IntelliJ IDEA.User: wx_weiyiheDate: /8/30Time: 15:50To change this template use File | Settings | File Templates.--%><%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head><title>Title</title></head><body><form method="post" action="/cookie">用户名:<input type="text" name="username" id="username"><br>密码:<input type="password" name="password" id="password"><br><input type="checkbox" name="remember" id="remember" value="true">记住密码<br><input type="submit" value="登录"></form></body><script>var cookies=document.cookie.split(";");function getCK(mkey) {for(var i=0;i<cookies.length;i++){var kv=cookies[i].split("=");if(kv[0].trim()==mkey){return kv[1].trim();}}return "";}window.onload=function(){var remember=getCK("remember");var username=getCK("username");var password=getCK("password");if(remember=='true'){var userNameInput=document.getElementById("username");userNameInput.value=username;var rememberInput=document.getElementById("remember");rememberInput.checked='checked';var passwordInput=document.getElementById("password");passwordInput.value=password;}}</script></html>
java处理,用户名密码验证，判断是否勾选记住密码，并生成cookie，保存到客户端
@RequestMapping("/cookie")public void cookieTest(HttpServletRequest request, HttpServletResponse response) throws IOException {response.setHeader("content-type","text/html;charset=utf-8");String username=request.getParameter("username");String password=request.getParameter("password");String remember=request.getParameter("remember");//这里方便测试我把用户名密码写死了 用户名:sw 密码:123boolean success="sw".equals(username) && "123".equals(password);if(success){response.getWriter().write("登陆成功");}else{response.getWriter().write("登陆失败");}if("true".equals(remember) && success==true){Cookie ck1=new Cookie("remember", remember);ck1.setMaxAge(60*60);response.addCookie(ck1);Cookie ck2=new Cookie("username", username);ck1.setMaxAge(60*60);response.addCookie(ck2);Cookie ck3=new Cookie("password", password);ck1.setMaxAge(60*60);response.addCookie(ck3);}else{//清除cookieCookie[] cks=request.getCookies();if(cks !=null){for (Cookie c : cks) {c.setMaxAge(0);response.addCookie(c);}}}}
查看效果
退出去重新刷新页面,密码自动绑定
总结
把密码存入cookie是有盗号风险的，为了解决这个问题，推荐将密码加密，这样就能保证密码的安全了。欢迎大家一起研究
