Submit按钮无法重定向至/students页面问题排查求助

核心问题1：表单元素未被form标签包裹 #

你的<form>标签直接提前闭合，所有输入框和提交按钮都处于form标签外部，导致点击Submit时，浏览器无法识别这是表单提交操作，自然不会触发POST请求。必须将所有表单相关元素（输入框、提交按钮）嵌套在form标签内部。

核心问题2：Thymeleaf字段绑定语法错误 #

当通过th:object="${student}"绑定Student对象后，th:field应直接引用对象属性（如*{firstName}），而非*{student.firstName}——th:object已指定当前上下文对象为student，无需重复添加对象前缀。

修正后的完整代码 #

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Student Management System</title>
<link rel="stylesheet"
    href="https://cdn.jsdelivr.net/npm/bootstrap@4.4.1/dist/css/bootstrap.min.css"
    integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh"
    crossorigin="anonymous">
</head>
<body>

    <div class="container">
        <div class="row">
            <div
                class="col-lg-6 col-md-6 col-sm-6 container justify-content-center card">
                <h1 class="text-center">Create New Student</h1>
                <div class="card-body"></div>
                <!-- 表单标签包裹所有表单元素 -->
                <form th:action="@{/students}" th:object="${student}" method="POST">
                    <div class="form-group">
                        <label>Student First Name</label> <input type="text"
                            name="firstName" th:field="*{firstName}" class="form-control"
                            placeholder="Enter Student First Name" />
                    </div>
                    <div class="form-group">
                        <label>Student Last Name</label> <input type="text" name="lastName"
                            th:field="*{lastName}" class="form-control"
                            placeholder="Enter Student Last Name" />
                    </div>
                    <div class="form-group">
                        <label>Student Email</label> <input type="text" name="email"
                            th:field="*{email}" class="form-control"
                            placeholder="Enter Student Email" />
                    </div>
                    <div class="box-footer">
                        <button class="btn btn-primary" type="submit" value="submit">Submit</button>
                    </div>
                </form>
            </div>
        </div>

    </div>

</body>
</html>

内容的提问来源于stack exchange，提问作者Cuneyt YAZ