Thymeleaf/Spring MVC-如何在链接表达式中嵌套变量/表达式? [英] Thymeleaf/Spring MVC - How do you nest variables/expressions in a Link expression?

问题描述

例如，我在Spring中的控制器方法就是这样做的:

For example, my controller method in Spring does this:

model.addAttribute("view_name", "foobar")

我正在尝试在我的Thymeleaf模板中做到这一点:

And I'm trying to do this in my Thymeleaf template:

<link th:href="@{/resources/libs/css/${view_name}.css}" rel="stylesheet" />

但是渲染的结果是这样的:

But the rendered result is this:

<link href="/app/resources/libs/css/${view_name}.css" rel="stylesheet" />

所以它并没有像我期望的那样取代${view_name}.

So it's not replacing the ${view_name} like I'm expecting.

我做错了什么?一般来说，如何在Thymeleaf中嵌套这样的表达式?

What am I doing wrong? In general, how do you nest expressions like that in Thymeleaf?

推荐答案

由于您未使用表达式(例如${...}，#{...}，|...|，__...__，'quoted string'， ...)，Thymeleaf会将整个表达式视为String，而不执行任何内部表达式.

Since you are not starting the url rewrite with an expression (e.g. ${...}, #{...}, |...|, __...__, 'quoted string', ...), Thymeleaf will consider the whole expression as a String and not execute any of the inner expressions.

以下示例将起作用，因为它以表达式开头.

The following example would work because it starts with an expression.

@{${attribute}}

对于您的示例，您具有以下可能性

For your example you have the following possibilities

文学替代(首选方法)

您可以使用管道语法(|)在String中进行文字替换.

You can do literal substitions in a String with the pipeline syntax (|).

<link th:href="@{|/resources/libs/css/${view_name}.css|}" rel="stylesheet" />

字符串串联

<link th:href="@{'/resources/libs/css/' + ${view_name} + '.css'}" rel="stylesheet" />

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