根据上下文数据显示主动导航-Java问题

Displaying active navigation based on contextual data(根据上下文数据显示主动导航)

本文介绍了根据上下文数据显示主动导航的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我在 Thymeleaf 模板中有以下分离的片段.

I have the following separated fragment in a Thymeleaf template.

<ul class="nav nav-tabs">
    <li role="presentation"><a href="/">Freight Invoices</a></li>
    <li role="presentation"><a href="/processed">Processed Invoices</a></li>
    <li role="presentation"><a href="/postingrules">Posting Rules</a></li>
    <li role="presentation" class="active"><a href="/settings">Settings</a></li>
</ul>

我想为活动导航元素添加一个活动"类——但在 Thymyleaf 中似乎很难实现.有什么建议吗?

I want to add an "active" class to active navigation element — but it seems hard to accomplish in Thymyleaf. Any suggestions?

推荐答案

您可以在控制器中为每个页面添加一个 ModelAttribute，其值为 active，例如:

You could add a ModelAttribute with the value active in your controllers for each page, e.g. :

SettingsController.java

@RequestMapping("/settings")
public String viewSettings(Model model) {
  // do stuff
  model.addAttribute("classActiveSettings","active");
  return "settings";
}

OR 在 SettingsControllerAdvice.java

@ControllerAdvice(assignableTypes = SettingsController.class)
public class SettingsControllerAdvice {

    @ModelAttribute("classActiveSettings")
    public String cssActivePage() {
        return "active";
    }

}

然后，在您的 settings.html 中包含的导航片段中:

Then, in the navigation fragment included in your settings.html :

<ul class="nav nav-tabs">
     <!-- Other links -->
    <li role="presentation" th:class="${classActiveSettings}">
       <a th:href="@{/settings}">Settings</a>
    </li>
</ul>

最后，您可以对导航栏中的每个控制器和链接重复此过程.

Finally, you can repeat this process for each controller and links in your navbar.

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