EL1008E: 在类型为“java.util.ArrayList"的对象上找不到属性或字段“内容" - 可能不是公共的或无效的? [英] EL1008E: Property or field 'content' cannot be found on object of type 'java.util.ArrayList' - maybe not public or not valid?

问题描述

我试图为我的项目(电话簿)制作简单的过滤器，以便能够通过他们的电子邮件而不是 id 找到用户联系人.当我简单地启动 URL 时:http://localhost:8080/home/phonebook.我收到以下错误.

I trying to make simple filter for my project(phonebook) to be able to find users contacts by their email instead of id. When I simply lauch the URL: http://localhost:8080/home/phonebook. I get the following error.

错误信息

org.thymeleaf.exceptions.TemplateProcessingException:异常评估 SpringEL 表达式:data.content"(模板:/home/phonebook" - 第 29 行，第 13 栏)

org.thymeleaf.exceptions.TemplateProcessingException: Exception evaluating SpringEL expression: "data.content" (template: "/home/phonebook" - line 29, col 13)

原因:org.springframework.expression.spel.SpelEvaluationException: EL1008E:在类型的对象上找不到属性或字段内容"'java.util.ArrayList' - 可能不是公开的或无效的?

Caused by: org.springframework.expression.spel.SpelEvaluationException: EL1008E: Property or field 'content' cannot be found on object of type 'java.util.ArrayList' - maybe not public or not valid?

HomeController

@RequestMapping(value = {"/home/phonebook"}, method = RequestMethod.GET)
    public String showPage(Model model, @RequestParam(defaultValue = "0") int page){
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        User user = userService.findUserByEmail(auth.getName());
        model.addAttribute("data",phonebookRepository.findAllByUserEmail(user.getEmail(),PageRequest.of(page,10)));
        model.addAttribute("currentPage",page);
        return "/home/phonebook";
    }

Phonebook.html

<tr th:each="phonebook :${data.content}">
        <td th:text="${phonebook.id}"></td>
        <td th:text="${phonebook.surname}"></td>
        <td th:text="${phonebook.firstname}"></td>
        <td th:text="${phonebook.phoneNumber}"></td>
        <td>
            <a th:href="@{delete/(id=${phonebook.id})}" class="btn btn-danger delBtn">Delete</a>
            <a th:href="@{findOne/(id=${phonebook.id})}" class="btn btn-primary eBtn">Edit</a></td>
    </tr>
    </tbody>
    </table>
        <hr/>
        <ul class="nav nav-pills">
            <li class="nav-item" th:each="i: ${#numbers.sequence(0,data.totalPages-1)}">
                <a th:href="@{/home/phonebook(page=${i})}" th:text="${i}" class="nav-link"
                   th:classappend="${currentPage}==${i}?'active':''"></a>
            </li>
        </ul>

PhonebookRepository

@Repository("phonebookRepository")
public interface PhonebookRepository extends JpaRepository<Phonebook,Integer> {
    List<Phonebook> findAllByUserEmail(String email, Pageable pageable);
}

安全配置

@Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.jdbcAuthentication().dataSource(dataSource)
                .usersByUsernameQuery("select email, password, active from users where email=?")
                .authoritiesByUsernameQuery("select u.email, r.role from users u inner join user_role ur on(u.user_id=ur.user_id) inner join role r on(ur.role_id=r.role_id) where u.email=?")
                .passwordEncoder(passwordEncoder());

    }

更新 1

对 <tr th:each="phonebook :${data}"> 进行了更改，我认为它修复了它，但出现了新错误；

Made changes to <tr th:each="phonebook :${data}"> and i think it fixes it but i got a new error;

org.thymeleaf.exceptions.TemplateProcessingException:异常评估 SpringEL 表达式:#numbers.sequence(0,data.totalPages-1)"(模板:/home/phonebook"- 第 42 行，第 38 列)

org.thymeleaf.exceptions.TemplateProcessingException: Exception evaluating SpringEL expression: "#numbers.sequence(0,data.totalPages-1)" (template: "/home/phonebook" - line 42, col 38)

原因:org.springframework.expression.spel.SpelEvaluationException: EL1008E:在类型的对象上找不到属性或字段totalPages"'java.util.ArrayList' - 可能不是公开的或无效的?

Caused by: org.springframework.expression.spel.SpelEvaluationException: EL1008E: Property or field 'totalPages' cannot be found on object of type 'java.util.ArrayList' - maybe not public or not valid?

推荐答案

更改

到

因为要迭代查询列表结果，但是data.content只是一个属性.

Because you want to iterate the query list result,but data.content is just a property.

这篇关于EL1008E: 在类型为“java.util.ArrayList"的对象上找不到属性或字段“内容" - 可能不是公共的或无效的?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！