JFinal Web开发学习(七)使用layUI美化的登录功能

2023-02-24 18:53:07

效果：

验证码还是没有布局好.背景比较怀古.

1.写前端html
login.jsp

<!DOCTYPE html>

<html>

<head>

<meta charset="UTF-8">

<meta name="viewport"

    content="width=device-width, initial-scale=1, maximum-scale=1">

<title>登录</title>

<link rel="stylesheet" href="/static/css/layui.css">

<link rel="stylesheet" href="/static/css/login.css">

</head>

<body>

    <div class="clear box layui-main login">

        <form class="layui-form layui-form-pane1" action="ulogin" method="post">

            <div class="layui-form-item">

                <label class="layui-form-label">用户名：</label>

                <div class="layui-input-block">

                    <input type="text" name="user.name" lay-verify="uname" required

                        placeholder="请输入用户名" autocomplete="off" class="layui-input">${UnameErrMsg?if_exists}

                </div>

            </div>

            <div class="layui-form-item">

                <label class="layui-form-label">密码：</label>

                <div class="layui-input-block">

                    <input type="password" name="user.pwd" lay-verify="" required

                        placeholder="请输入密码" autocomplete="off" class="layui-input">${PwdErrMsg?if_exists}

                </div>

            </div>

            <div class="layui-form-item">

                <label class="layui-form-label">验证码：</label>

                <div class="layui-input-block">

                    <input type="text" name="yzm" lay-verify="" required

                        placeholder="请输入验证码" autocomplete="off" class="layui-input">${yzmErrMsg?if_exists}<br>

                <a href="/login.html"><img alt="验证码" src="/yzm"></a>

                </div>

            </div>

            <div class="layui-form-item">

            <label class="layui-form-label"></label>

                <button class="layui-btn layui-btn-normal btn-center" type="submit">登录</button>

            </div>

        </form>

    </div>

    <script src="/static/js/layui.js"></script>

</body>

</html>

登录界面样式

@CHARSET "UTF-8";

body{

    background-image:url(/static/images/login-bg.png);

}

.login {

    padding-top: 15%;

    width: 26%;

}

.btn-center{

    text-center:center;

    margin:0 auto;

}

2.写控制器
其中就是login方法与ulogin方法
controller包下IndexController类

package cn.pangpython.controller;

import com.jfinal.aop.Before;

import com.jfinal.core.Controller;

import com.jfinal.ext.kit.SessionIdKit;

import cn.pangpython.model.User;

import cn.pangpython.utils.DateUtils;

import cn.pangpython.utils.MD5;

import cn.pangpython.validate.RegistValidator;

import cn.pangpython.validate.UserLoginValidator;

/**

 * @author pangPython

 * 主页控制器

 */

public class IndexController extends Controller {

    public void index(){

        renderText("index");

    }

    //渲染注册页面

    public void regpage(){

        render("regist.html");

    }

    //处理注册

    @Before(RegistValidator.class)

    public void regist(){

        String pwd = getPara("user.pwd");

        String confirm = getPara("reg.confirm");

        //验证码验证

        boolean result = validateCaptcha("reg.yzm");

        if(!result){

            setAttr("yzmErrMsg", "验证码错误！");

            render("regist.html");

            return;

        }

        //确认密码验证

        if(!pwd.equals(confirm)){

            setAttr("confirmErrMsg", "请正确填写确认密码！");

            render("regist.html");

            return;

        }

        String uname = getPara("user.name");

        User user = getModel(User.class);

        String reg_time = DateUtils.dateToUnixTimestamp(DateUtils.getNowTime())+"";

        //使用用户注册日期作为md5密码加密的盐值,可节省一个salt数据库字段

        pwd = MD5.GetMD5Code(pwd+reg_time);

        //给user实体类填充数据

        user.setName(uname);

        user.setPwd(pwd);

        user.setRegTime(reg_time);

        //使用jfinal的保存操作

        user.save();

        renderText("注册成功！");

    }

    public void login(){

        render("login.html");

    }

    @Before(UserLoginValidator.class)

    public void ulogin(){

        // 验证码结果

        boolean result = validateCaptcha("yzm");

        if (!result) {

            setAttr("yzmErrMsg", "验证码错误！");

            render("login.html");

            return;

        }

        String uname = getPara("user.name");

        String sql = "select * from user where name = ? limit 1";

        User user = User.dao.findFirst(sql, uname);

        if (user != null) {

            String pwd = MD5.GetMD5Code(getPara("user.pwd") + user.getRegTime());

            if (user.getPwd().equals(pwd)) {

                // 生成唯一标识

                String sessionId = SessionIdKit.me().generate(getRequest());

                // 设置服务器端session

                setSessionAttr(sessionId, user);

                // 设置用户端cookie

                setCookie("cuser", sessionId, 60000);

                //redirect("/user");

                renderText("登录成功！");

            } else {

                // 密码不正确

                setAttr("UnameErrMsg", "用户名或密码不正确！");

                render("login.html");

            }

        } else {

            // 用户名不存在

            setAttr("UnameErrMsg", "用户名不存在！");

            render("login.html");

        }

    }

}

3.写登录验证器
validator包下的UserLoginValidator继承JFinal的Validator

package cn.pangpython.validate;

import com.jfinal.core.Controller;

import com.jfinal.validate.Validator;

public class UserLoginValidator extends Validator {

    @Override

    protected void handleError(Controller controller) {

        controller.keepPara();

    }

    @Override

    protected void validate(Controller arg0) {

        validateRequired("user.name", "UnameErrMsg", "请输入用户名！");

        validateRequired("user.pwd", "PwdErrMsg", "请输入密码！");

        validateRequired("yzm", "yzmErrMsg", "请输入验证码！");

    }

}

注：验证码的校验也可以在验证器中进行验证
到此就完成了登录功能.运行config文件，访问

http://localhost/login

原文：https://blog.csdn.net/u012995856/article/details/52927053

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