是否可以在 Thymeleaf 中创建动态替换?
我有以下控制器:
@Controller公共类登录控制器{@RequestMapping("/登录")公共字符串getLogin(模型模型){model.addAttribute("模板","登录");返回索引"；}}以及以下视图:
<html xmlns:th="http://www.thymeleaf.org" ><头></头><身体><div th:replace="fragments/${template} :: ${template}"></div>我收到以下错误:
解析模板fragments/${template}"时出错，模板可能不存在或可能无法被任何配置的模板解析器访问更新
我尝试像这样预处理我的变量:
<div th:replace="fragments/${__#{${template}}__} :: ${__#{${template}}__}"></div>现在 ${template} 怎么被替换为 login 我现在有以下错误:
评估 SpringEL 表达式的异常:??login_en_US??"我相信在 thymeleaf 中管理这种行为的适当方法是使用 layout:fragment 标签.如果我错了，请纠正我.这是我的布局页面的一个简单示例，以及动态"加载的登录页面:
layout.html
<头><title layout:title-pattern="$DECORATOR_TITLE - $CONTENT_TITLE">布局</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/><meta http-equiv="X-UA-Compatible" content="IE=Edge"/><身体><div><div class="app-container"><div th:fragment="内容"><div th:fragment="script"></div></html>
然后，当 login 被加载时，它将 th:fragment div 替换为 html 视图中与控制器方法返回的字符串匹配的关联 div，在本例中为 login.html:
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"xmlns:layout="http://www.w3.org/1999/xhtml"布局:装饰者=布局"><头><title>登录</title><身体><div th:fragment="内容"><form th:action="@{/login}" method="post"><div><标签>用户名:<input type="text" name="username"/></label></div><div><标签>密码:<input type="password" name="password"/></label></div><div><input type="submit" value="Sign In"/></div></表单></html>
现在，如果您想有条件地加载另一个片段，我采用的方法是添加带有 th:if 情况的替换标签.下面是一个基于当前用户属性显示不同问题的表单示例:
<div th:replace="fragments/custom-questions :: type-1-checkboxes"></div><div th:if="${foo.type} == 'type_2'"><div th:replace="fragments/custom-questions :: type-2-checkboxes"></div>
然后从文件 custom-questions.html 加载关联的 div:
//东西<div th:fragment="type-2-checkboxes">//东西
Is it possible to create a dynamic replace in Thymeleaf?
I have the following controller:
@Controller
public class LoginController {
@RequestMapping("/login")
public String getLogin(Model model){
model.addAttribute("template","login");
return "index";
}
}
And the following view:
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org" >
<head></head>
<body>
<div th:replace="fragments/${template} :: ${template}"></div>
</body>
</html>
And i'm getting the following error:
Error resolving template "fragments/${template}", template might not exist or might not be accessible by any of the configured Template Resolvers
UPDATE
I tried to preprocess my variables like this:
<div th:replace="fragments/${__#{${template}}__} :: ${__#{${template}}__}"></div>
How ever now ${template} is getting replaced with login i have the following error now:
Exception evaluating SpringEL expression: "??login_en_US??"
I believe the appropriate method to manage this behavior in thymeleaf is to use layout:fragment tags. Please correct me if I'm wrong. Here is a simple example of my layout page, and the login page which is 'dynamically' loaded:
layout.html
<html xmlns:layout="http://www.w3.org/1999/xhtml" xmlns:th="http://www.w3.org/1999/xhtml">
<head>
<title layout:title-pattern="$DECORATOR_TITLE - $CONTENT_TITLE">Layout</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=Edge"/>
</head>
<body>
<div>
<div class="app-container">
<div th:fragment="content">
</div>
</div>
</div>
<div th:fragment="script"></div>
</body>
</html>
Then, when login gets loaded, it replaces the th:fragment div with the associated div in the html view which matches the string returned by the controller method, in this case login.html:
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"
xmlns:layout="http://www.w3.org/1999/xhtml"
layout:decorator="layout">
<head>
<title>Login</title>
</head>
<body>
<div th:fragment="content">
<form th:action="@{/login}" method="post">
<div><label> User Name : <input type="text" name="username"/> </label></div>
<div><label> Password: <input type="password" name="password"/> </label></div>
<div><input type="submit" value="Sign In"/></div>
</form>
</div>
</body>
</html>
Now, if you want to load another fragment conditionally, the approach I take is to add replace tags with th:if cases. Here's an example of a Form that displays different questions based on an attribute of the current user:
<div th:if="${foo.type)} == 'type_1'">
<div th:replace="fragments/custom-questions :: type-1-checkboxes"></div>
</div>
<div th:if="${foo.type} == 'type_2'">
<div th:replace="fragments/custom-questions :: type-2-checkboxes"></div>
</div>
Then the associated div gets loaded from the file custom-questions.html:
<div th:fragment="type-1-checkboxes">
//stuff
</div>
<div th:fragment="type-2-checkboxes">
//stuff
</div>
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