错误：.TemplateProcessingException: Exception evaluating SpringEL expression:_exception processing template "error": exception e

错误org.thymeleaf.exceptions.TemplateInputException: An error happened during template parsing (template: “class path resource [templates/login/main.html]”)
Caused by: org.attoparser.ParseException: Exception evaluating SpringEL expression: “sub.url” (template: “login/main” - line 38, col 32)
Caused by: org.thymeleaf.exceptions.TemplateProcessingException: Exception evaluating SpringEL expression: “sub.url” (template: “login/main” - line 38, col 32)
2021-04-17 08:24:17.012 ERROR 4572 — [nio-8080-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.thymeleaf.exceptions.TemplateInputException: An error happened during template parsing (template: “class path resource [templates/login/main.html]”)] with root cause

HTML代码：

<dl class="layui-nav-child" th:if="${resource.subs} ne null " th:each="sub:${resource.subs}">
                        <dd><a th:href="'javascript:showTab(\''+${sub.url}+'\',\'' +${sub.resourceName}+'\',' + ${sub.resourceId} +');'" th:text="${sub.resourceName}">列表一</a></dd>

                    </dl>

<script th:src="@{/webjars/layui/layui.all.js}"></script>
<script th:src="@{/webjars/jquery/jquery.js}"></script>
<script th:src="@{/static/js/login/main.js}"></script>
1
2
3
4
5
6
7
8

js

function showTab(url,name,id){
    let length = $("li[lay-id="+id+"]").length;
    let element = layui.element;

    if (length == 0) {
        let fullUrl = "/" + url;
        let height = $(window).height() - 185;
        let content = '<iframe style="width: 100%;height: '+height+'px" src="' +fullUrl+'" frameborder="0" scrolling="no">'
        element.tabAdd('menu', {
            title: name,
            content: content,
            id: id
        });
    }
    element.tabChange("menu", id);
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

后台是没有URL的实体属性的。。。。。
解决：尚未解决
更新：需要在后台加入URL的实体属性。。