Spring Authorization Server 打造认证中心(三)自定义登录页

上期回顾

上篇文章我们修改了认证中心的用户来源和客户端来源,使其能被数据库表管理,本期我们讲解如何自定义修改丑丑的登录页。

自定义登录页

默认的登录页是这样的:

实际我们肯定不能拿这个出来用,那么如何自定义呢,跟我做:

1. 设计登录页模板

我们不是专业前端,可以申请公司UI资源或借助AI科技来生成一个thymeleafhtml模板,提示词就是让设计一个Spring Security的登录页,然后提出你的具体需求描述。

假设我们得到以下页面:

2. 添加登录页

将上面的html模板放到项目的resources/templates/login.html

然后给项目添加thymeleaf依赖:

xml 复制代码
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>

同时创建一个Controller,将默认/login映射到这个模板

这样在访问 /login时,就会到我们修改后的登录页了。

3. 修改配置

在第一篇的基础上,修改下面的地方

kotlin 复制代码
/**
 * 调用拦截链2:其余非oauth2请求拦截到登录页
 */
@Bean
@Order(2)
@Throws(java.lang.Exception::class)
fun defaultSecurityFilterChain(http: HttpSecurity): SecurityFilterChain {
    http
        .authorizeHttpRequests { authorize ->
            authorize.anyRequest().authenticated()
        } // Form login handles the redirect to the login page from the
        // authorization server filter chain
        // .formLogin(Customizer.withDefaults())
        .formLogin { it.loginPage("/login").permitAll() }
    return http.build()
}

把默认逻辑改成到'/login'这里去登录。

重启服务就能看到效果了😄

输入用户名和密码登录后,地址栏会出现一个continue的参数,代表登录认证通过。

附上登录页源码(由AI生成,仅供参考):

html 复制代码
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org" xmlns:sec="http://www.thymeleaf.org/extras/spring-security">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>登录 - 统一认证中心</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <style>
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            height: 100vh;
            overflow: hidden;
            background: #0f0f0f;
        }

        .login-wrapper {
            display: flex;
            height: 100vh;
            position: relative;
        }

        .left-section {
            flex: 1;
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .background-image {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.85), rgba(30, 41, 59, 0.75)),
            url('') center/cover;
            animation: backgroundZoom 20s ease-in-out infinite alternate;
        }

        @keyframes backgroundZoom {
            0% { transform: scale(1); }
            100% { transform: scale(1.1); }
        }

        .floating-elements {
            position: absolute;
            width: 100%;
            height: 100%;
            overflow: hidden;
            opacity: 0.3;
        }

        .floating-circle {
            position: absolute;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(168, 85, 247, 0.3));
            animation: float 15s ease-in-out infinite;
            backdrop-filter: blur(40px);
        }

        .floating-circle:nth-child(1) {
            width: 300px;
            height: 300px;
            top: -100px;
            left: -100px;
            animation-delay: 0s;
        }

        .floating-circle:nth-child(2) {
            width: 250px;
            height: 250px;
            bottom: -80px;
            right: 10%;
            animation-delay: 3s;
        }

        .floating-circle:nth-child(3) {
            width: 200px;
            height: 200px;
            top: 50%;
            left: 20%;
            animation-delay: 6s;
        }

        @keyframes float {
            0%, 100% { transform: translate(0, 0) scale(1); }
            33% { transform: translate(30px, -50px) scale(1.1); }
            66% { transform: translate(-20px, 30px) scale(0.9); }
        }

        .logo-section {
            position: relative;
            z-index: 2;
            text-align: center;
            color: white;
            padding: 40px;
        }

        .logo-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, #6366f1, #a855f7);
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 30px;
            font-size: 40px;
            box-shadow: 0 20px 60px rgba(99, 102, 241, 0.4);
            animation: logoFloat 3s ease-in-out infinite;
        }

        @keyframes logoFloat {
            0%, 100% { transform: translateY(0px); }
            50% { transform: translateY(-10px); }
        }

        .logo-text {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 15px;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #fff, #e0e7ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .logo-subtitle {
            font-size: 16px;
            opacity: 0.8;
            letter-spacing: 2px;
            font-weight: 300;
        }

        .right-section {
            flex: 1;
            background: white;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            /* 移除斜线分割,改为竖线分割 */
            border-left: 1px solid rgba(0, 0, 0, 0.1);
        }

        .login-container {
            width: 100%;
            max-width: 420px;
            padding: 60px 50px;
            animation: slideInRight 0.6s ease-out;
        }

        @keyframes slideInRight {
            from {
                opacity: 0;
                transform: translateX(30px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        .login-header {
            margin-bottom: 40px;
        }

        .login-header h1 {
            font-size: 32px;
            font-weight: 700;
            color: #1e293b;
            margin-bottom: 10px;
            letter-spacing: -0.5px;
        }

        .login-header p {
            color: #64748b;
            font-size: 15px;
            line-height: 1.6;
        }

        .form-group {
            margin-bottom: 24px;
            position: relative;
        }

        .form-group label {
            display: block;
            margin-bottom: 10px;
            font-weight: 600;
            color: #334155;
            font-size: 14px;
            letter-spacing: 0.3px;
        }

        .input-wrapper {
            position: relative;
        }

        .input-icon {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: #94a3b8;
            font-size: 16px;
            transition: color 0.3s ease;
            pointer-events: none;
        }

        .form-control {
            width: 100%;
            padding: 14px 16px 14px 46px;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 15px;
            transition: all 0.3s ease;
            background: #f8fafc;
        }

        .form-control:focus {
            border-color: #6366f1;
            outline: none;
            background: white;
            box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
        }

        .form-control:focus ~ .input-icon {
            color: #6366f1;
        }

        .btn-login {
            width: 100%;
            padding: 15px;
            background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
            border: none;
            border-radius: 12px;
            color: white;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 10px;
            position: relative;
            overflow: hidden;
        }

        .btn-login::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            transition: left 0.5s ease;
        }

        .btn-login:hover::before {
            left: 100%;
        }

        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(99, 102, 241, 0.4);
        }

        .btn-login:active {
            transform: translateY(0);
        }

        .btn-logout {
            width: 100%;
            padding: 15px;
            background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
            border: none;
            border-radius: 12px;
            color: white;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 20px;
        }

        .btn-logout:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(239, 68, 68, 0.4);
        }

        .divider {
            display: flex;
            align-items: center;
            margin: 30px 0;
            color: #94a3b8;
            font-size: 13px;
        }

        .divider::before,
        .divider::after {
            content: "";
            flex: 1;
            border-bottom: 1px solid #e2e8f0;
        }

        .divider span {
            padding: 0 20px;
            font-weight: 500;
        }

        .cas-login-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 100%;
            padding: 14px;
            background: white;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            color: #475569;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
        }

        .cas-login-btn:hover {
            border-color: #6366f1;
            background: #f8fafc;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
        }

        .cas-login-btn i {
            margin-right: 10px;
            font-size: 18px;
            color: #6366f1;
        }

        .error-message {
            background: linear-gradient(135deg, #fef2f2, #fee2e2);
            color: #dc2626;
            padding: 14px 16px;
            border-radius: 12px;
            margin-bottom: 24px;
            font-size: 14px;
            border-left: 4px solid #dc2626;
            animation: shake 0.5s ease;
            display: none;
        }

        .error-message.active {
            display: block;
        }

        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            25% { transform: translateX(-10px); }
            75% { transform: translateX(10px); }
        }

        .success-message {
            background: linear-gradient(135deg, #f0fdf4, #dcfce7);
            color: #16a34a;
            padding: 16px;
            border-radius: 12px;
            margin-bottom: 24px;
            text-align: center;
            font-size: 15px;
            border-left: 4px solid #16a34a;
            animation: fadeInScale 0.5s ease;
        }

        @keyframes fadeInScale {
            from {
                opacity: 0;
                transform: scale(0.9);
            }
            to {
                opacity: 1;
                transform: scale(1);
            }
        }

        .user-info {
            text-align: center;
            margin-bottom: 24px;
            padding: 24px;
            background: linear-gradient(135deg, #f8fafc, #f1f5f9);
            border-radius: 16px;
            border: 2px solid #e2e8f0;
        }

        .user-avatar {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, #6366f1, #a855f7);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 36px;
            color: white;
            box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
        }

        .user-info h3 {
            color: #1e293b;
            margin-bottom: 8px;
            font-size: 20px;
            font-weight: 600;
        }

        .user-info p {
            color: #64748b;
            font-size: 14px;
        }

        .footer-links {
            text-align: center;
            margin-top: 28px;
            font-size: 14px;
            color: #64748b;
        }

        .footer-links a {
            color: #6366f1;
            text-decoration: none;
            transition: color 0.3s ease;
            font-weight: 500;
        }

        .footer-links a:hover {
            color: #a855f7;
        }

        @media (max-width: 1024px) {
            .left-section {
                display: none;
            }

            .right-section {
                flex: 1;
                border-left: none;
            }
        }

        @media (max-width: 480px) {
            .login-container {
                padding: 40px 30px;
            }

            .login-header h1 {
                font-size: 26px;
            }
        }

        .particles {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            overflow: hidden;
            pointer-events: none;
        }

        .particle {
            position: absolute;
            background: rgba(255, 255, 255, 0.5);
            border-radius: 50%;
            animation: particleFloat 20s linear infinite;
        }

        .particle:nth-child(1) {
            width: 4px;
            height: 4px;
            left: 10%;
            animation-delay: 0s;
            animation-duration: 15s;
        }

        .particle:nth-child(2) {
            width: 6px;
            height: 6px;
            left: 25%;
            animation-delay: 2s;
            animation-duration: 18s;
        }

        .particle:nth-child(3) {
            width: 3px;
            height: 3px;
            left: 40%;
            animation-delay: 4s;
            animation-duration: 20s;
        }

        .particle:nth-child(4) {
            width: 5px;
            height: 5px;
            left: 55%;
            animation-delay: 1s;
            animation-duration: 16s;
        }

        .particle:nth-child(5) {
            width: 4px;
            height: 4px;
            left: 70%;
            animation-delay: 3s;
            animation-duration: 19s;
        }

        .particle:nth-child(6) {
            width: 6px;
            height: 6px;
            left: 85%;
            animation-delay: 5s;
            animation-duration: 17s;
        }

        @keyframes particleFloat {
            0% {
                transform: translateY(100vh) scale(0);
                opacity: 0;
            }
            10% {
                opacity: 1;
            }
            90% {
                opacity: 1;
            }
            100% {
                transform: translateY(-100px) scale(1);
                opacity: 0;
            }
        }
    </style>
</head>
<body>
<div class="login-wrapper">
    <div class="left-section">
        <div class="background-image"></div>

        <div class="floating-elements">
            <div class="floating-circle"></div>
            <div class="floating-circle"></div>
            <div class="floating-circle"></div>
        </div>

        <div class="particles">
            <div class="particle"></div>
            <div class="particle"></div>
            <div class="particle"></div>
            <div class="particle"></div>
            <div class="particle"></div>
            <div class="particle"></div>
        </div>

        <div class="logo-section">
            <div class="logo-icon">
                <i class="fas fa-shield-alt"></i>
            </div>
            <div class="logo-text">统一认证中心</div>
            <div class="logo-subtitle">SECURE AUTHENTICATION</div>
        </div>
    </div>

    <div class="right-section">
        <div class="login-container">
            <div class="error-message" th:if="${param.error}">
                <i class="fas fa-exclamation-circle"></i>
                <span th:if="${session.SPRING_SECURITY_LAST_EXCEPTION != null and session.SPRING_SECURITY_LAST_EXCEPTION.message != null}"
                      th:text="${session.SPRING_SECURITY_LAST_EXCEPTION.message}">
                            用户名或密码错误
                        </span>
                <span th:if="${session.SPRING_SECURITY_LAST_EXCEPTION == null or session.SPRING_SECURITY_LAST_EXCEPTION.message == null}">
                            用户名或密码错误
                        </span>
            </div>

            <form th:action="@{/login}" method="post">
                <div class="form-group">
                    <label for="username">用户名</label>
                    <div class="input-wrapper">
                        <input type="text" id="username" name="username" class="form-control"
                               placeholder="请输入用户名" required autofocus>
                        <i class="fas fa-user input-icon"></i>
                    </div>
                </div>

                <div class="form-group">
                    <label for="password">密码</label>
                    <div class="input-wrapper">
                        <input type="password" id="password" name="password" class="form-control"
                               placeholder="请输入密码" required>
                        <i class="fas fa-lock input-icon"></i>
                    </div>
                </div>

                <button type="submit" class="btn-login">
                    <i class="fas fa-sign-in-alt"></i> 登录
                </button>
            </form>

            <div class="divider">
                <span>或使用其他方式登录</span>
            </div>

            <div class="footer-links">
                <a href="#">忘记密码?</a> • <a href="#">注册新账户</a>
            </div>
        </div>
    </div>
</div>

<script>
    document.addEventListener('DOMContentLoaded', function () {
        const urlParams = new URLSearchParams(window.location.search);
        if (urlParams.has('error')) {
            const errorElement = document.querySelector('.error-message');
            if (errorElement) {
                errorElement.classList.add('active');
                setTimeout(() => {
                    errorElement.classList.remove('active');
                }, 5000);
            }
        }

        const form = document.querySelector('form[action*="/login"]');
        if (form) {
            const username = document.getElementById('username');
            const password = document.getElementById('password');

            form.addEventListener('submit', function (e) {
                if (username && password && (!username.value.trim() || !password.value.trim())) {
                    e.preventDefault();
                    alert('请输入用户名和密码');
                }
            });

            const inputs = document.querySelectorAll('.form-control');
            inputs.forEach(input => {
                input.addEventListener('focus', function () {
                    this.parentElement.classList.add('focused');
                });

                input.addEventListener('blur', function () {
                    if (!this.value) {
                        this.parentElement.classList.remove('focused');
                    }
                });
            });
        }
    });

</script>
</body>
</html>

登录状态优化

按上面操作后按理已经是可以使用了,但是有一个问题:

登录以后如果用户手动再访问 '/login' 页,还会直接显示上面的登录界面,也就是看不出来登录还是没登录的区分,所以我们再加一个已登录状态的优化,这个要借助一个插件库实现:

xml 复制代码
<dependency>
    <groupId>org.thymeleaf.extras</groupId>
    <artifactId>thymeleaf-extras-springsecurity6</artifactId>
    <version>3.1.3.RELEASE</version>
</dependency>

pom里引入后,再修改一下login页代码:

html 复制代码
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>登录 - 统一认证中心</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <style>
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            height: 100vh;
            overflow: hidden;
            background: #0f0f0f;
        }

        .login-wrapper {
            display: flex;
            height: 100vh;
            position: relative;
        }

        .left-section {
            flex: 1;
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .background-image {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.85), rgba(30, 41, 59, 0.75)),
            url('') center/cover;
            animation: backgroundZoom 20s ease-in-out infinite alternate;
        }

        @keyframes backgroundZoom {
            0% {
                transform: scale(1);
            }
            100% {
                transform: scale(1.1);
            }
        }

        .floating-elements {
            position: absolute;
            width: 100%;
            height: 100%;
            overflow: hidden;
            opacity: 0.3;
        }

        .floating-circle {
            position: absolute;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(168, 85, 247, 0.3));
            animation: float 15s ease-in-out infinite;
            backdrop-filter: blur(40px);
        }

        .floating-circle:nth-child(1) {
            width: 300px;
            height: 300px;
            top: -100px;
            left: -100px;
            animation-delay: 0s;
        }

        .floating-circle:nth-child(2) {
            width: 250px;
            height: 250px;
            bottom: -80px;
            right: 10%;
            animation-delay: 3s;
        }

        .floating-circle:nth-child(3) {
            width: 200px;
            height: 200px;
            top: 50%;
            left: 20%;
            animation-delay: 6s;
        }

        @keyframes float {
            0%, 100% {
                transform: translate(0, 0) scale(1);
            }
            33% {
                transform: translate(30px, -50px) scale(1.1);
            }
            66% {
                transform: translate(-20px, 30px) scale(0.9);
            }
        }

        .logo-section {
            position: relative;
            z-index: 2;
            text-align: center;
            color: white;
            padding: 40px;
        }

        .logo-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, #6366f1, #a855f7);
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 30px;
            font-size: 40px;
            box-shadow: 0 20px 60px rgba(99, 102, 241, 0.4);
            animation: logoFloat 3s ease-in-out infinite;
        }

        @keyframes logoFloat {
            0%, 100% {
                transform: translateY(0px);
            }
            50% {
                transform: translateY(-10px);
            }
        }

        .logo-text {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 15px;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #fff, #e0e7ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .logo-subtitle {
            font-size: 16px;
            opacity: 0.8;
            letter-spacing: 2px;
            font-weight: 300;
        }

        .right-section {
            flex: 1;
            background: white;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            /* 移除斜线分割,改为竖线分割 */
            border-left: 1px solid rgba(0, 0, 0, 0.1);
        }

        .login-container {
            width: 100%;
            max-width: 420px;
            padding: 60px 50px;
            animation: slideInRight 0.6s ease-out;
        }

        @keyframes slideInRight {
            from {
                opacity: 0;
                transform: translateX(30px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        .login-header {
            margin-bottom: 40px;
        }

        .login-header h1 {
            font-size: 32px;
            font-weight: 700;
            color: #1e293b;
            margin-bottom: 10px;
            letter-spacing: -0.5px;
        }

        .login-header p {
            color: #64748b;
            font-size: 15px;
            line-height: 1.6;
        }

        .form-group {
            margin-bottom: 24px;
            position: relative;
        }

        .form-group label {
            display: block;
            margin-bottom: 10px;
            font-weight: 600;
            color: #334155;
            font-size: 14px;
            letter-spacing: 0.3px;
        }

        .input-wrapper {
            position: relative;
        }

        .input-icon {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: #94a3b8;
            font-size: 16px;
            transition: color 0.3s ease;
            pointer-events: none;
        }

        .form-control {
            width: 100%;
            padding: 14px 16px 14px 46px;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 15px;
            transition: all 0.3s ease;
            background: #f8fafc;
        }

        .form-control:focus {
            border-color: #6366f1;
            outline: none;
            background: white;
            box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
        }

        .form-control:focus ~ .input-icon {
            color: #6366f1;
        }

        .btn-login {
            width: 100%;
            padding: 15px;
            background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
            border: none;
            border-radius: 12px;
            color: white;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 10px;
            position: relative;
            overflow: hidden;
        }

        .btn-login::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            transition: left 0.5s ease;
        }

        .btn-login:hover::before {
            left: 100%;
        }

        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(99, 102, 241, 0.4);
        }

        .btn-login:active {
            transform: translateY(0);
        }

        .btn-logout {
            width: 100%;
            padding: 15px;
            background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
            border: none;
            border-radius: 12px;
            color: white;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 20px;
        }

        .btn-logout:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(239, 68, 68, 0.4);
        }

        .divider {
            display: flex;
            align-items: center;
            margin: 30px 0;
            color: #94a3b8;
            font-size: 13px;
        }

        .divider::before,
        .divider::after {
            content: "";
            flex: 1;
            border-bottom: 1px solid #e2e8f0;
        }

        .divider span {
            padding: 0 20px;
            font-weight: 500;
        }

        .cas-login-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 100%;
            padding: 14px;
            background: white;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            color: #475569;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
        }

        .cas-login-btn:hover {
            border-color: #6366f1;
            background: #f8fafc;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
        }

        .cas-login-btn i {
            margin-right: 10px;
            font-size: 18px;
            color: #6366f1;
        }

        .error-message {
            background: linear-gradient(135deg, #fef2f2, #fee2e2);
            color: #dc2626;
            padding: 14px 16px;
            border-radius: 12px;
            margin-bottom: 24px;
            font-size: 14px;
            border-left: 4px solid #dc2626;
            animation: shake 0.5s ease;
            display: none;
        }

        .error-message.active {
            display: block;
        }

        @keyframes shake {
            0%, 100% {
                transform: translateX(0);
            }
            25% {
                transform: translateX(-10px);
            }
            75% {
                transform: translateX(10px);
            }
        }

        .success-message {
            background: linear-gradient(135deg, #f0fdf4, #dcfce7);
            color: #16a34a;
            padding: 16px;
            border-radius: 12px;
            margin-bottom: 24px;
            text-align: center;
            font-size: 15px;
            border-left: 4px solid #16a34a;
            animation: fadeInScale 0.5s ease;
        }

        @keyframes fadeInScale {
            from {
                opacity: 0;
                transform: scale(0.9);
            }
            to {
                opacity: 1;
                transform: scale(1);
            }
        }

        .user-info {
            text-align: center;
            margin-bottom: 24px;
            padding: 24px;
            background: linear-gradient(135deg, #f8fafc, #f1f5f9);
            border-radius: 16px;
            border: 2px solid #e2e8f0;
        }

        .user-avatar {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, #6366f1, #a855f7);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 36px;
            color: white;
            box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
        }

        .user-info h3 {
            color: #1e293b;
            margin-bottom: 8px;
            font-size: 20px;
            font-weight: 600;
        }

        .user-info p {
            color: #64748b;
            font-size: 14px;
        }

        .footer-links {
            text-align: center;
            margin-top: 28px;
            font-size: 14px;
            color: #64748b;
        }

        .footer-links a {
            color: #6366f1;
            text-decoration: none;
            transition: color 0.3s ease;
            font-weight: 500;
        }

        .footer-links a:hover {
            color: #a855f7;
        }

        @media (max-width: 1024px) {
            .left-section {
                display: none;
            }

            .right-section {
                flex: 1;
                border-left: none;
            }
        }

        @media (max-width: 480px) {
            .login-container {
                padding: 40px 30px;
            }

            .login-header h1 {
                font-size: 26px;
            }
        }

        .particles {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            overflow: hidden;
            pointer-events: none;
        }

        .particle {
            position: absolute;
            background: rgba(255, 255, 255, 0.5);
            border-radius: 50%;
            animation: particleFloat 20s linear infinite;
        }

        .particle:nth-child(1) {
            width: 4px;
            height: 4px;
            left: 10%;
            animation-delay: 0s;
            animation-duration: 15s;
        }

        .particle:nth-child(2) {
            width: 6px;
            height: 6px;
            left: 25%;
            animation-delay: 2s;
            animation-duration: 18s;
        }

        .particle:nth-child(3) {
            width: 3px;
            height: 3px;
            left: 40%;
            animation-delay: 4s;
            animation-duration: 20s;
        }

        .particle:nth-child(4) {
            width: 5px;
            height: 5px;
            left: 55%;
            animation-delay: 1s;
            animation-duration: 16s;
        }

        .particle:nth-child(5) {
            width: 4px;
            height: 4px;
            left: 70%;
            animation-delay: 3s;
            animation-duration: 19s;
        }

        .particle:nth-child(6) {
            width: 6px;
            height: 6px;
            left: 85%;
            animation-delay: 5s;
            animation-duration: 17s;
        }

        @keyframes particleFloat {
            0% {
                transform: translateY(100vh) scale(0);
                opacity: 0;
            }
            10% {
                opacity: 1;
            }
            90% {
                opacity: 1;
            }
            100% {
                transform: translateY(-100px) scale(1);
                opacity: 0;
            }
        }
    </style>
</head>
<body>
<div class="login-wrapper">
    <div class="left-section">
        <div class="background-image"></div>

        <div class="floating-elements">
            <div class="floating-circle"></div>
            <div class="floating-circle"></div>
            <div class="floating-circle"></div>
        </div>

        <div class="particles">
            <div class="particle"></div>
            <div class="particle"></div>
            <div class="particle"></div>
            <div class="particle"></div>
            <div class="particle"></div>
            <div class="particle"></div>
        </div>

        <div class="logo-section">
            <div class="logo-icon">
                <i class="fas fa-shield-alt"></i>
            </div>
            <div class="logo-text">统一认证中心</div>
            <div class="logo-subtitle">SECURE AUTHENTICATION</div>
        </div>
    </div>

    <div class="right-section">
        <div class="login-container">
            <div th:if="${#authorization == null or !#authorization.expression('isAuthenticated()')}">
                <div class="error-message" th:if="${param.error}">
                    <i class="fas fa-exclamation-circle"></i>
                    <span th:if="${session.SPRING_SECURITY_LAST_EXCEPTION != null and session.SPRING_SECURITY_LAST_EXCEPTION.message != null}"
                          th:text="${session.SPRING_SECURITY_LAST_EXCEPTION.message}">
                            用户名或密码错误
                        </span>
                    <span th:if="${session.SPRING_SECURITY_LAST_EXCEPTION == null or session.SPRING_SECURITY_LAST_EXCEPTION.message == null}">
                            用户名或密码错误
                        </span>
                </div>

                <form th:action="@{/login}" method="post">
                    <div class="form-group">
                        <label for="username">用户名</label>
                        <div class="input-wrapper">
                            <input type="text" id="username" name="username" class="form-control"
                                   placeholder="请输入用户名" required autofocus>
                            <i class="fas fa-user input-icon"></i>
                        </div>
                    </div>

                    <div class="form-group">
                        <label for="password">密码</label>
                        <div class="input-wrapper">
                            <input type="password" id="password" name="password" class="form-control"
                                   placeholder="请输入密码" required>
                            <i class="fas fa-lock input-icon"></i>
                        </div>
                    </div>

                    <button type="submit" class="btn-login">
                        <i class="fas fa-sign-in-alt"></i> 登录
                    </button>
                </form>

                <div class="divider">
                    <span>或使用其他方式登录</span>
                </div>

                <div class="footer-links">
                    <a href="#">忘记密码?</a> • <a href="#">注册新账户</a>
                </div>
            </div>
            <div th:if="${#authorization != null and #authorization.expression('isAuthenticated()')}">
                <div class="success-message">
                    <i class="fas fa-check-circle"></i> 您已成功登录
                </div>

                <div class="user-info">
                    <div class="user-avatar">
                        <i class="fas fa-user"></i>
                    </div>
                    <h3 th:text="'欢迎,' + ${#authentication.name} + '!'">欢迎,用户!</h3>
                    <p>您已经成功登录到统一认证中心</p>
                </div>

                <form th:action="@{/logout}" method="post">
                    <button type="submit" class="btn-logout">
                        <i class="fas fa-sign-out-alt"></i> 安全退出
                    </button>
                </form>

                <div class="footer-links">
                    <a th:href="@{/}">返回首页</a> • <a href="#">个人中心</a>
                </div>
            </div>
        </div>
    </div>
</div>

<script>
    document.addEventListener('DOMContentLoaded', function () {
        const urlParams = new URLSearchParams(window.location.search);
        if (urlParams.has('error')) {
            const errorElement = document.querySelector('.error-message');
            if (errorElement) {
                errorElement.classList.add('active');
                setTimeout(() => {
                    errorElement.classList.remove('active');
                }, 5000);
            }
        }

        const form = document.querySelector('form[action*="/login"]');
        if (form) {
            const username = document.getElementById('username');
            const password = document.getElementById('password');

            form.addEventListener('submit', function (e) {
                if (username && password && (!username.value.trim() || !password.value.trim())) {
                    e.preventDefault();
                    alert('请输入用户名和密码');
                }
            });

            const inputs = document.querySelectorAll('.form-control');
            inputs.forEach(input => {
                input.addEventListener('focus', function () {
                    this.parentElement.classList.add('focused');
                });

                input.addEventListener('blur', function () {
                    if (!this.value) {
                        this.parentElement.classList.remove('focused');
                    }
                });
            });
        }
    });

</script>
</body>
</html>

修改点在于使用

html 复制代码
<div th:if="${#authorization != null and #authorization.expression('isAuthenticated()')}">

这种判断标签来区分是否登录了,而authorization对象正是上面引入的thymeleaf-extras-springsecurity6所提供的。

修改后,当登录后再手动跳到登录页的话,会显示如下界面:

是不是更加合理了。

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