Question

尝试打开/ users时出现错误。我不知道如何解决我的代码中的错误。我添加httpSecurity后出现了错误。

类控制器：

@GetMapping("/users")
 public String userPage(Model m) {
    m.addAttribute("Users", dao.findAll());
    return "users";
}

users.html：

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
    <head th:include="layout::head"> </head>
    <body>
        <div th:include="layout :: navigationPanel"></div>
        <h1>User list:</h1>

        <div th:if="${#lists.isEmpty(Users)}">
        No users...
        </div>
            <table th:if="${!#lists.isEmpty(Users)}">
            <tr> <th>UserID</th> 
            <th>Name</th>
            <th>Surname</th>
            <th>Login</th>
            <th>Password</th>
            <th sec:authentication="!isAuthenticated()">Edit</th>
            <th sec:authorize="!isAuthenticated()">Delete</th>
            </tr>
            <tr th:each="Users:${Users}">
            <td th:text="${Users.userid}"></td>
            <td th:text="${Users.name}"></td>
            <td th:text="${Users.surname}"></td>
            <td th:text="${Users.login}"></td>
            <td th:text="${Users.password}"></td>
            <td sec:authentication="!isAuthenticated()"><a th:href="@{/edit/__${Users.userid}__}">Edit</a></td>
            <td sec:authentication="!isAuthenticated()"><a th:href="@{/delete/__${Users.userid}__}" >Delete</a></td>
            </tr>
            </table>
        <div th:include="layout::footer"></div>
    </body>
</html>

Answer 1

在@GetMapping中，您返回"users"，但模板名称为"user-list"

并写th:if={!Users.isEmpty()}这会造成问题。你检查

是否从数据库获取输出

Answer 2

将以下依赖项添加到pom.xml

org.thymeleaf.extras.
thymeleaf-extras-springsecurity4.
将您的html标记更改为<html lang="en" xmlns:th="http://www.thymeleaf.org" xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity4">

春季启动错误：类型=内部服务器错误，状态= 500

2 个答案: